{"id":40240,"date":"2023-03-11T17:03:30","date_gmt":"2023-07-23T17:20:35","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%86java-8%e7%9a%84spring-boot-querydsl%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e5%8d%87%e7%ba%a7%e8%87%b3java-11%e3%80%82\/"},"modified":"2024-04-29T18:26:09","modified_gmt":"2024-04-29T10:26:09","slug":"%e5%b0%86java-8%e7%9a%84spring-boot-querydsl%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e5%8d%87%e7%ba%a7%e8%87%b3java-11%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%86java-8%e7%9a%84spring-boot-querydsl%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e5%8d%87%e7%ba%a7%e8%87%b3java-11%e3%80%82\/","title":{"rendered":"\u5c06Java 8\u7684Spring Boot + QueryDSL\u5e94\u7528\u7a0b\u5e8f\u5347\u7ea7\u81f3Java 11"},"content":{"rendered":"<h1>\u603b\u7ed3<\/h1>\n<p>\u5728\u5c06\u8fd0\u884c\u5728Java 8\u4e0a\u7684\u5e94\u7528\u7a0b\u5e8f\u8fc1\u79fb\u5230Java 11\u65f6\uff0c\u6211\u4eec\u8fdb\u884c\u4e86\u5b9e\u73b0\u65b9\u6cd5\u7684\u8c03\u67e5\u3002<br \/>\n\u7531\u4e8eSpring Boot\u5df2\u6b63\u5f0f\u652f\u6301JOOQ\uff0c\u5e76\u4e14\u4f3c\u4e4e\u505c\u6b62\u4e86\u5bf9QueryDSL\u7684\u5f00\u53d1\uff0c\u6240\u4ee5\u4eca\u540e\u5b83\u7684\u4f7f\u7528\u53ef\u80fd\u4f1a\u51cf\u5c11\u3002<br \/>\n\u7531\u4e8e\u9700\u8981\u8fdb\u884c\u8f83\u591a\u7684\u66f4\u6539\uff0c\u56e0\u6b64\u6211\u5c06\u8fd9\u4e9b\u66f4\u6539\u7684\u5185\u5bb9\u7559\u4f5c\u5907\u5fd8\u5f55\u3002<\/p>\n<h1>\u6846\u67b6\u7b49<\/h1>\n<p>\u5f00\u53d1\u73af\u5883\u9884\u8ba1\u4f7f\u7528 IntelliJ IDEA\u3002<br \/>\n\u5e94\u7528\u7a0b\u5e8f\u7531\u4ee5\u4e0b\u6280\u672f\u6808\u6784\u6210\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Jdk 1.8.0.131<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Gradle 3.5-rc-2<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Spring Boot 1.5.4.RELEASE<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">QueryDSL 4.2.1<\/ul>\n<h1>\u9879\u76ee\u7684\u7ec4\u6210<\/h1>\n<p>\u4f7f\u7528Gradle\u6765\u8fd0\u884c\u4efb\u52a1\u8c03\u5ea6\u5668\u548c\u89e3\u51b3\u4f9d\u8d56\u5173\u7cfb\u3002<br \/>\n\u8be6\u7ec6\u5185\u5bb9\u8bf7\u53c2\u8003build.gradle\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">buildscript<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"n\">ext<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">springBootVersion<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\"1.5.4.RELEASE\"<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"k\">repositories<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">mavenCentral<\/span><span class=\"o\">()<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">classpath<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}\"<\/span><span class=\"o\">)<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"n\">apply<\/span> <span class=\"nl\">plugin:<\/span> <span class=\"s2\">\"java\"<\/span>\r\n<span class=\"n\">apply<\/span> <span class=\"nl\">plugin:<\/span> <span class=\"s2\">\"org.springframework.boot\"<\/span>\r\n\r\n<span class=\"n\">version<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\"1.0.0\"<\/span>\r\n<span class=\"n\">sourceCompatibility<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">1.8<\/span>\r\n\r\n<span class=\"k\">repositories<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">mavenCentral<\/span><span class=\"o\">()<\/span>\r\n<span class=\"o\">}<\/span>\r\n<span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.querydsl:querydsl-apt:4.2.1'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.querydsl:querydsl-sql:4.2.1'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.querydsl:querydsl-sql-spring:4.2.1'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.querydsl:querydsl-jpa:4.2.1'<\/span><span class=\"o\">)<\/span>\r\n\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.springframework.boot:spring-boot-starter-jdbc\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.springframework.boot:spring-boot-starter-data-jpa\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter-aop'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.springframework.boot:spring-boot-starter-web\"<\/span><span class=\"o\">)<\/span>\r\n\r\n    <span class=\"n\">compile<\/span> <span class=\"s2\">\"org.lazyluke:log4jdbc-remix:0.2.7\"<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.bgee.log4jdbc-log4j2:log4jdbc-log4j2-jdbc4.1:1.16\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter-actuator'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter-data-jpa'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">runtime<\/span><span class=\"o\">(<\/span><span class=\"s1\">'mysql:mysql-connector-java'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.projectlombok:lombok'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">testRuntime<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.h2database:h2'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">testCompile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.dbunit:dbunit:2.5.1'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">testCompile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter-test'<\/span><span class=\"o\">)<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"k\">sourceSets<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">generated<\/span>\r\n<span class=\"o\">}<\/span>\r\n<span class=\"k\">sourceSets<\/span><span class=\"o\">.<\/span><span class=\"na\">generated<\/span><span class=\"o\">.<\/span><span class=\"na\">java<\/span><span class=\"o\">.<\/span><span class=\"na\">srcDirs<\/span> <span class=\"o\">=<\/span> <span class=\"o\">[<\/span><span class=\"s1\">'build\/classes\/main'<\/span><span class=\"o\">]<\/span>\r\n<span class=\"n\">configurations<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">querydslapt<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"cm\">\/**** QueryDSL Class Generate Script to avoid lombok error ****\/<\/span>\r\n<span class=\"kt\">def<\/span> <span class=\"n\">queryDslOutput<\/span> <span class=\"o\">=<\/span> <span class=\"n\">file<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"src\/main\/generated\"<\/span><span class=\"o\">)<\/span>\r\n<span class=\"k\">sourceSets<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">main<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">java<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"n\">srcDir<\/span> <span class=\"n\">queryDslOutput<\/span>\r\n        <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"n\">task<\/span> <span class=\"nf\">generateQueryDSL<\/span><span class=\"o\">(<\/span><span class=\"nl\">type:<\/span> <span class=\"n\">JavaCompile<\/span><span class=\"o\">,<\/span> <span class=\"nl\">group:<\/span> <span class=\"s1\">'build'<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">source<\/span> <span class=\"o\">=<\/span> <span class=\"k\">sourceSets<\/span><span class=\"o\">.<\/span><span class=\"na\">main<\/span><span class=\"o\">.<\/span><span class=\"na\">java<\/span>\r\n    <span class=\"n\">classpath<\/span> <span class=\"o\">=<\/span> <span class=\"n\">configurations<\/span><span class=\"o\">.<\/span><span class=\"na\">compile<\/span>\r\n    <span class=\"n\">destinationDir<\/span> <span class=\"o\">=<\/span> <span class=\"n\">queryDslOutput<\/span>\r\n    <span class=\"n\">options<\/span><span class=\"o\">.<\/span><span class=\"na\">compilerArgs<\/span> <span class=\"o\">=<\/span> <span class=\"o\">[<\/span>\r\n            <span class=\"s2\">\"-proc:only\"<\/span><span class=\"o\">,<\/span>\r\n            <span class=\"s2\">\"-processor\"<\/span><span class=\"o\">,<\/span> <span class=\"s1\">'com.querydsl.apt.jpa.JPAAnnotationProcessor,lombok.launch.AnnotationProcessorHider$AnnotationProcessor'<\/span>\r\n    <span class=\"o\">]<\/span>\r\n<span class=\"o\">}<\/span>\r\n<span class=\"n\">compileJava<\/span><span class=\"o\">.<\/span><span class=\"na\">dependsOn<\/span><span class=\"o\">(<\/span><span class=\"n\">generateQueryDSL<\/span><span class=\"o\">)<\/span>\r\n\r\n<span class=\"n\">clean<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">delete<\/span> <span class=\"n\">queryDslOutput<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>QueryDSL\u7684\u4efb\u52a1<\/h2>\n<p>\u5728\u4e0a\u8ff0\u7684 build.gradle \u6587\u4ef6\u4e2d\uff0c\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a generateQueryDSL \u7684\u4efb\u52a1\u3002\u8fd9\u4e2a\u4efb\u52a1\u88ab\u5b9a\u4e49\u4e3a JavaCompile\u3002\u5f53\u8be5\u4efb\u52a1\u88ab\u6267\u884c\u65f6\uff0c\u5b83\u4f1a\u751f\u6210 QueryDSL \u7684\u6e90\u4ee3\u7801\uff08\u4ee5\u4e0b\u79f0\u4e3a Q java \u6587\u4ef6\uff09\u3002\u7701\u7565\u4e86\u5bf9 QueryDSL \u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u4f46\u8be5\u6846\u67b6\u4f7f\u7528\u4e86\u6ce8\u89e3\u5904\u7406\u5668\u5de5\u5177\uff08APT\uff09\u7684\u529f\u80fd\u3002APT \u4f1a\u63d0\u53d6 Java \u7c7b\uff0c\u5e76\u751f\u6210\u7528\u4e8e\u5b9e\u73b0\u9488\u5bf9\u8fd9\u4e9b\u63d0\u53d6\u7684\u7c7b\u7684\u67e5\u8be2\u7684\u65b9\u6cd5\u94fe\u7684\u7c7b\u6587\u4ef6\u3002<\/p>\n<h3>JPA\u6ce8\u89e3\u5904\u7406\u5668<\/h3>\n<p>\u5728build.gradle\u7684generateQueryDSL\u4e2d\u6709\u4e00\u4e9b\u5c5e\u6027\uff0c\u800cJPAAnnotationProcessor\u901a\u8fc7options.compilerArgs\u5c5e\u6027\u5c06\u5176\u5b9a\u4e49\u4e3aAPT\u3002\u5f53\u7f16\u8bd1Java\u65f6\uff0cAPT\u5c06\u4ee5\u9644\u6709\u4ee5\u4e0b\u6ce8\u89e3\u7684\u7c7b\u4f5c\u4e3a\u7f16\u8bd1\u76ee\u6807\u3002<\/p>\n<p>\u30fb @\u5b9e\u4f53<br \/>\n\u30fb @\u6620\u5c04\u8d85\u7c7b<br \/>\n\u30fb @\u53ef\u5d4c\u5165<br \/>\n\u30fb @\u5d4c\u5165\u5f0f<\/p>\n<p>\u53e6\u5916\uff0cgenerateQueryDSL\u4efb\u52a1\u7684\u5c5e\u6027\u610f\u4e49\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">source<\/ul>\n<\/li>\n<\/ul>\n<p>main \u914d\u4e0b\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u5bfe\u8c61\u306b<\/p>\n<p>destination<\/p>\n<p>build.gradle \u3067 compile \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30af\u30e9\u30b9\u30d1\u30b9\u306b\u901a\u3059<\/p>\n<p>destinationDir<\/p>\n<p>APT \u306e\u6210\u679c\u7269\u3092\u914d\u7f6e\u3059\u308b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3002src\/main\/generated \u306b\u306a\u308a\u307e\u3059\u3002SourceSets \u306e\u5b9a\u7fa9\u306b\u3088\u308a\u3001src\/main\/generated \u304c\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306e\u914d\u7f6e\u5834\u6240\u3068\u3057\u3066 IDE \u306b\u8a8d\u8b58\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>options.compilerArgs<\/p>\n<p>APT \u306e\u30af\u30e9\u30b9\u3092\u6307\u5b9a\u3002QueryDSL \u306e APT \u304c\u52d5\u4f5c\u3059\u308b\u969b\u306b\u5fc5\u8981\u3068\u306a\u308b\u306e\u3067\u3001Lobok \u306e APT \u3082\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002APT \u306f\u30ab\u30f3\u30de\u3067\u533a\u5207\u308a\u3067\u6307\u5b9a\u3002<\/p>\n<p>\u53c2\u8003<br \/>\nJavaCompile\u7c7b<br \/>\nhttps:\/\/docs.gradle.org\/current\/javadoc\/org\/gradle\/api\/tasks\/compile\/JavaCompile.html<\/p>\n<p>\u53c2\u8003<br \/>\nJavaCompile\u7c7b\u662fGradle API\u4e2d\u7684\u4e00\u4e2a\u4efb\u52a1\u7f16\u8bd1\u7c7b\u3002\u53ef\u4ee5\u5728\u4ee5\u4e0b\u94fe\u63a5\u627e\u5230\u8be6\u7ec6\u7684\u6587\u6863\u548c\u8bf4\u660e\uff1a<br \/>\nhttps:\/\/docs.gradle.org\/current\/javadoc\/org\/gradle\/api\/tasks\/compile\/JavaCompile.html<\/p>\n<h2>\u6267\u884c generateQueryDSL<\/h2>\n<p>\u6309\u7167\u4e0a\u8ff0\u7684\u5b9a\u4e49\uff0cgenerateQueryDSL\u4efb\u52a1\u5c06\u88ab\u6267\u884c\uff0c\u5e76\u6700\u7ec8\u751f\u6210Q java\u6587\u4ef6\u3002<br \/>\n\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4ee5\u4e0b\u5b9e\u4f53\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@Entity<\/span>\r\n<span class=\"nd\">@Getter<\/span>\r\n<span class=\"nd\">@NoArgsConstructor<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">MemberInformation<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Serializable<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nd\">@Id<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">Integer<\/span> <span class=\"n\">memberId<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">Integer<\/span> <span class=\"n\">artistId<\/span><span class=\"o\">;<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u7684 Q Java \u6587\u4ef6\u5c06\u4f5c\u4e3a\u6210\u54c1\u751f\u6210\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@Generated<\/span><span class=\"o\">(<\/span><span class=\"s\">\"com.querydsl.codegen.EntitySerializer\"<\/span><span class=\"o\">)<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">QMemberInformation<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">EntityPathBase<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">MemberInformation<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">static<\/span> <span class=\"kd\">final<\/span> <span class=\"kt\">long<\/span> <span class=\"n\">serialVersionUID<\/span> <span class=\"o\">=<\/span> <span class=\"o\">-<\/span><span class=\"mi\">575571004L<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"nc\">ConstructorExpression<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">MemberInformation<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">create<\/span><span class=\"o\">(<\/span><span class=\"nc\">Expression<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Integer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">artistId<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nc\">Projections<\/span><span class=\"o\">.<\/span><span class=\"na\">constructor<\/span><span class=\"o\">(<\/span><span class=\"nc\">MemberInformation<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">,<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Class<\/span><span class=\"o\">&lt;?&gt;[]{<\/span><span class=\"kt\">int<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">},<\/span> <span class=\"n\">artistId<\/span><span class=\"o\">,<\/span> <span class=\"n\">memberId<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">static<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">PathInits<\/span> <span class=\"no\">INITS<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">PathInits<\/span><span class=\"o\">.<\/span><span class=\"na\">DIRECT2<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">QMemberInformation<\/span> <span class=\"n\">memberInformation<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">QMemberInformation<\/span><span class=\"o\">(<\/span><span class=\"s\">\"memberInformation\"<\/span><span class=\"o\">);<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">NumberPath<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Integer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">artistId<\/span> <span class=\"o\">=<\/span> <span class=\"n\">createNumber<\/span><span class=\"o\">(<\/span><span class=\"s\">\"artistId\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Integer<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">);<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">NumberPath<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Integer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">memberId<\/span> <span class=\"o\">=<\/span> <span class=\"n\">createNumber<\/span><span class=\"o\">(<\/span><span class=\"s\">\"memberId\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Integer<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">);<\/span>\r\n   <span class=\"c1\">\/\/ \u4ee5\u4e0b\u7701\u7565<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u6309\u7167\u4e0b\u9762\u7684\u7ed3\u6784\uff0cJava\u6587\u4ef6\u7684\u751f\u6210\u76ee\u5f55\u5c06\u4f4d\u4e8e src\/main\/generated \u5b50\u76ee\u5f55\u4e0b\u3002<br \/>\n\u7531\u4e8e src\/main\/generated \u5b50\u76ee\u5f55\u4e0b\u7684\u6e90\u4ee3\u7801\u5df2\u7ecf\u88ab\u914d\u7f6e\u4e3aGradle\u7684\u7f16\u8bd1\u76ee\u6807\u6e90\u4ee3\u7801\uff0c\u6240\u4ee5 src\/main\/java \u76ee\u5f55\u4e0b\u7684\u7c7b\u53ef\u4ee5\u5f15\u7528\u8fd9\u4e9b\u6e90\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;Project Root&gt;\r\n  |- src\r\n  |   |- main\r\n  |   |    |- generated\r\n  |   |    |     |- QMemberInformation.java\r\n  |   |    | - java  --&gt; \u914d\u4e0b\u306e Java \u30d5\u30a1\u30a4\u30eb\u306fQMemberInformation.java \u3092\u53c2\u7167\u53ef\u80fd\r\n  |   |    |     |- MemberInformation.java\r\n  |   |- test\r\n<\/code><\/pre>\n<h1>\u8fc1\u79fb\u5230Java 11<\/h1>\n<p>\u4e3a\u4e86\u8fc1\u79fb\u5230Java 11\uff0c\u6211\u4eec\u5347\u7ea7\u4e86Spring Boot\u548cGradle\u7684\u7248\u672c\u3002<br \/>\n\u5728IntelliJ IDEA\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7Command + ; -&gt; [Project]\u8bbe\u7f6e\u4e86JDK 11\u3002<br \/>\n\u6b64\u5916\uff0c\u6211\u4eec\u4f7f\u7528jenv\u5c06Java 11\u8bbe\u7f6e\u4e3a\u9ed8\u8ba4\u7684JDK\u3002<\/p>\n<h2>\u6625\u5b63\u5f15\u5bfc<\/h2>\n<p>\u636e\u5b98\u65b9\u9875\u9762\u663e\u793a\uff0c\u636e\u8bf4Java 9\u4ee5\u53ca\u4ee5\u4e0a\u7248\u672c\u4e0d\u652f\u63011.5.x\u7248\u672c\u3002<br \/>\n\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u5347\u7ea7\u5230Spring Boot 2.1.1\u7248\u672c\u3002<\/p>\n<blockquote><p>Spring Boot 2\u662f\u7b2c\u4e00\u4e2a\u652f\u6301Java 9\u7684\u7248\u672c\uff08\u540c\u65f6\u4e5f\u652f\u6301Java 8\uff09\u3002\u5982\u679c\u4f60\u6b63\u5728\u4f7f\u75281.5\u7248\u672c\u4e14\u5e0c\u671b\u4f7f\u7528Java 9\uff0c\u4f60\u5e94\u8be5\u5347\u7ea7\u52302.0\uff0c\u56e0\u4e3a\u6211\u4eec\u6ca1\u6709\u8ba1\u5212\u5728Spring Boot 1.5.x\u4e0a\u652f\u6301Java 9\u3002<\/p><\/blockquote>\n<h2>Gradle &#8211; \u9002\u7528\u4e8e\u6784\u5efa\u5e94\u7528\u7a0b\u5e8f\u7684\u6784\u5efa\u81ea\u52a8\u5316\u5de5\u5177\u3002<\/h2>\n<p>\u5728Gradle 3.5\u4e2d\uff0cJava 11\u65e0\u6cd5\u8fd0\u884c\u3002\u53e6\u5916\uff0c\u4f7f\u7528Gradle 4.9\uff0c\u53ea\u9700\u5bf9\u6700\u5c0f\u9650\u5ea6\u7684build.gradle\u8fdb\u884c\u4fee\u6b63\uff0c\u5373\u53ef\u6b63\u5e38\u8fd0\u884c\uff0c\u4f46\u662f\u5982\u679c\u6d4b\u8bd5\u7c7b\u4e2d\u6709\u5185\u90e8\u7c7b\uff0c\u5219\u5b58\u5728\u65e0\u6cd5\u6b63\u5e38\u8fd0\u884c\u7684\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':test'.\r\n        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:110)\r\n        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:77)\r\n\r\n ......... omitted ..........\r\n\r\nCaused by: java.lang.IllegalArgumentException: Unsupported class file major version 55\r\n        at org.objectweb.asm.ClassReader.&lt;init&gt;(ClassReader.java:166)\r\n        at org.objectweb.asm.ClassReader.&lt;init&gt;(ClassReader.java:148)\r\n        at org.objectweb.asm.ClassReader.&lt;init&gt;(ClassReader.java:136)\r\n        at org.gradle.api.internal.tasks.testing.detection.AbstractTestFrameworkDetector.classVisitor(AbstractTestFrameworkDetector.java:123)\r\n        ... 67 more\r\n<\/code><\/pre>\n<p>\u4e3a\u6b64\uff0c\u6211\u5c06 Gradle \u7248\u672c\u5347\u7ea7\u5230 5.0\u3002<br \/>\n\u8981\u5347\u7ea7 Gradle \u7248\u672c\uff0c\u9700\u8981\u66f4\u6539 \/gradle\/wrapper\/gradle-wrapper.properties \u4e2d\u7684 distributionUrl\u3002<\/p>\n<pre class=\"post-pre\"><code>distributionUrl=https\\:\/\/services.gradle.org\/distributions\/gradle-3.5-rc-2-all.zip\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>distributionUrl=https\\:\/\/services.gradle.org\/distributions\/gradle-5.0-all.zip\r\n<\/code><\/pre>\n<p>\u53c2\u8003\uff1a<br \/>\n\u5982\u679c\u6d4b\u8bd5\u4e2d\u6709\u5185\u90e8\u7c7b\uff0c\u4f7f\u7528JDK 11\u6784\u5efa\u65f6\u4f1a\u51fa\u73b0\u95ee\u9898\u3002<br \/>\nhttps:\/\/github.com\/gradle\/gradle\/issues\/7723<\/p>\n<h1>build.gradle \u7684\u4fee\u6539<\/h1>\n<p>\u5728 Gradle \u4ece3.5\u5347\u7ea7\u52305.0\u7684\u8fc7\u7a0b\u4e2d\uff0cbuild.gradle\u7684\u89c4\u8303\u53d1\u751f\u4e86\u91cd\u5927\u53d8\u5316\uff0c\u56e0\u6b64\u6211\u91cd\u65b0\u7f16\u5199\u4e86\u4fee\u6539\u90e8\u5206\u3002<br \/>\n\u6b64\u5916\uff0c\u7531\u4e8e\u672a\u77e5\u662f\u7531\u4e8eGradle\u7684\u66f4\u6539\u8fd8\u662f\u7531\u4e8e\u5176\u4ed6\u539f\u56e0\uff0cIntelliJ IDEA\u7684\u64cd\u4f5c\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u56e0\u6b64\u6211\u5728build.gradle\u4e2d\u7f16\u5199\u4e86\u7528\u4e8e\u9002\u5e94\u8fd9\u4e9b\u64cd\u4f5c\u53d8\u5316\u7684\u914d\u7f6e\u3002<\/p>\n<p>\u5728\u4f7f\u7528Java 11\u7684Spring Boot + QueryDSL\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0cbuild.gradle\u6700\u7ec8\u53d8\u6210\u4e86\u8fd9\u6837\u7684\u5f62\u5f0f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">buildscript<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">ext<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"c1\">\/\/ \u2460 Spring Boot \u306e\u30d0\u30fc\u30b8\u30e7\u30f3<\/span>\r\n        <span class=\"n\">springBootVersion<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'2.1.1.RELEASE'<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"k\">repositories<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">mavenCentral<\/span><span class=\"o\">()<\/span>\r\n        <span class=\"c1\">\/\/ \u2461 \u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u8ffd\u52a0<\/span>\r\n        <span class=\"n\">maven<\/span> <span class=\"o\">{<\/span> <span class=\"n\">url<\/span> <span class=\"s1\">'http:\/\/repo.spring.io\/plugins-release'<\/span> <span class=\"o\">}<\/span>\r\n        <span class=\"n\">maven<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"n\">url<\/span> <span class=\"s2\">\"https:\/\/plugins.gradle.org\/m2\/\"<\/span>\r\n        <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">classpath<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">classpath<\/span> <span class=\"s2\">\"net.ltgt.gradle:gradle-apt-plugin:0.19\"<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"n\">apply<\/span> <span class=\"nl\">plugin:<\/span> <span class=\"s2\">\"java\"<\/span>\r\n<span class=\"n\">apply<\/span> <span class=\"nl\">plugin:<\/span> <span class=\"s2\">\"org.springframework.boot\"<\/span>\r\n<span class=\"c1\">\/\/\u2462 \u30d7\u30e9\u30b0\u30a4\u30f3\u8ffd\u52a0<\/span>\r\n<span class=\"n\">apply<\/span> <span class=\"nl\">plugin:<\/span> <span class=\"s1\">'io.spring.dependency-management'<\/span>\r\n<span class=\"n\">apply<\/span> <span class=\"nl\">plugin:<\/span> <span class=\"s1\">'net.ltgt.apt'<\/span>\r\n\r\n<span class=\"n\">version<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\"1.0.0\"<\/span>\r\n<span class=\"c1\">\/\/\u2463 Java \u306e\u30d0\u30fc\u30b8\u30e7\u30f3<\/span>\r\n<span class=\"n\">sourceCompatibility<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">11<\/span>\r\n\r\n<span class=\"k\">repositories<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">mavenCentral<\/span><span class=\"o\">()<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.querydsl:querydsl-apt:4.2.1'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.querydsl:querydsl-sql:4.2.1'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.querydsl:querydsl-sql-spring:4.2.1'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.querydsl:querydsl-jpa:4.2.1'<\/span><span class=\"o\">)<\/span>\r\n\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.springframework.boot:spring-boot-starter-jdbc\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.springframework.boot:spring-boot-starter-data-jpa\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter-aop'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.springframework.boot:spring-boot-starter-web\"<\/span><span class=\"o\">)<\/span>\r\n\r\n    <span class=\"n\">compile<\/span> <span class=\"s2\">\"org.lazyluke:log4jdbc-remix:0.2.7\"<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"org.bgee.log4jdbc-log4j2:log4jdbc-log4j2-jdbc4.1:1.16\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter-actuator'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter-data-jpa'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">runtime<\/span><span class=\"o\">(<\/span><span class=\"s1\">'mysql:mysql-connector-java'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">compile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.projectlombok:lombok'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">testRuntime<\/span><span class=\"o\">(<\/span><span class=\"s1\">'com.h2database:h2'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">testCompile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.dbunit:dbunit:2.5.1'<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">testCompile<\/span><span class=\"o\">(<\/span><span class=\"s1\">'org.springframework.boot:spring-boot-starter-test'<\/span><span class=\"o\">)<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u2464 Q Java \u30d5\u30a1\u30a4\u30eb\u3092\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3068\u3059\u308b<\/span>\r\n<span class=\"kt\">def<\/span> <span class=\"n\">queryDslDir<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\".\/out\/production\/classes\/generated\"<\/span>\r\n<span class=\"kt\">def<\/span> <span class=\"n\">queryDslOutput<\/span> <span class=\"o\">=<\/span> <span class=\"n\">file<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"${queryDslDir}\"<\/span><span class=\"o\">)<\/span>\r\n<span class=\"k\">sourceSets<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">main<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">java<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"n\">srcDir<\/span> <span class=\"n\">queryDslDir<\/span>\r\n        <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u2465\u3000APT \u306e\u4f9d\u5b58\u6027<\/span>\r\n<span class=\"kt\">def<\/span> <span class=\"n\">queryDSLVersion<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\"4.2.1\"<\/span>\r\n<span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">compile<\/span> <span class=\"s2\">\"com.querydsl:querydsl-jpa:${queryDSLVersion}\"<\/span>\r\n    <span class=\"n\">annotationProcessor<\/span><span class=\"o\">(<\/span>\r\n            <span class=\"s2\">\"com.querydsl:querydsl-apt:${queryDSLVersion}:jpa\"<\/span>\r\n            <span class=\"o\">,<\/span> <span class=\"s2\">\"javax.annotation:javax.annotation-api:1.3.2\"<\/span>\r\n            <span class=\"o\">,<\/span> <span class=\"s2\">\"org.hibernate.javax.persistence:hibernate-jpa-2.1-api:1.0.2.Final\"<\/span>\r\n    <span class=\"o\">)<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">compile<\/span> <span class=\"s2\">\"org.projectlombok:lombok:1.18.4\"<\/span>\r\n    <span class=\"n\">annotationProcessor<\/span> <span class=\"s2\">\"org.projectlombok:lombok:1.18.4\"<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"k\">dependencies<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">testCompile<\/span> <span class=\"s2\">\"org.projectlombok:lombok:1.18.4\"<\/span>\r\n    <span class=\"n\">testAnnotationProcessor<\/span><span class=\"o\">(<\/span>\r\n            <span class=\"s2\">\"org.projectlombok:lombok:1.18.4\"<\/span>\r\n    <span class=\"o\">)<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u2466 Gradle \u5b9f\u884c\u6642\u306e\u6319\u52d5<\/span>\r\n<span class=\"n\">compileJava<\/span><span class=\"o\">.<\/span><span class=\"na\">doFirst<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">delete<\/span> <span class=\"nf\">file<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"${queryDslDir}\/com\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"n\">ant<\/span><span class=\"o\">.<\/span><span class=\"na\">echo<\/span><span class=\"o\">(<\/span><span class=\"nl\">message:<\/span> <span class=\"s2\">\"compileJava... we successully deleted files\"<\/span><span class=\"o\">)<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"kt\">def<\/span> <span class=\"n\">gradleGeneratedDir<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\".\/build\/generated\/source\/apt\"<\/span>\r\n<span class=\"kt\">def<\/span> <span class=\"n\">gradleQueryDslOutput<\/span> <span class=\"o\">=<\/span> <span class=\"n\">file<\/span><span class=\"o\">(<\/span><span class=\"s2\">\"${gradleGeneratedDir}\"<\/span><span class=\"o\">)<\/span>\r\n<span class=\"n\">task<\/span> <span class=\"nf\">cleanUpQueryDsl<\/span><span class=\"o\">(<\/span><span class=\"nl\">type:<\/span> <span class=\"n\">Copy<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">from<\/span> <span class=\"s2\">\"${gradleGeneratedDir}\/main\"<\/span>\r\n    <span class=\"n\">into<\/span> <span class=\"s2\">\"${queryDslDir}\"<\/span>\r\n    <span class=\"n\">doLast<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">delete<\/span> <span class=\"n\">gradleQueryDslOutput<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<span class=\"n\">compileJava<\/span><span class=\"o\">.<\/span><span class=\"na\">finalizedBy<\/span><span class=\"o\">(<\/span><span class=\"n\">cleanUpQueryDsl<\/span><span class=\"o\">)<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u2467 clean \u6642\u306e\u6319\u52d5<\/span>\r\n<span class=\"n\">clean<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">delete<\/span> <span class=\"n\">gradleQueryDslOutput<\/span>\r\n    <span class=\"n\">delete<\/span> <span class=\"n\">queryDslOutput<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u5c06\u89e3\u91ca\u4e0b\u9762\u7684\u66f4\u6539\u5185\u5bb9\u3002<\/p>\n<h2>\u2460 Spring Boot \u7248\u672c<\/h2>\n<p>\u5c06 Spring Boot \u7248\u672c\u5347\u7ea7\u81f3 2.1.1\u3002<\/p>\n<h2>\u2461 \u6dfb\u52a0\u5b58\u50a8\u5e93<\/h2>\n<p>\u6dfb\u52a0Spring Boot \u548cGradle\u63d2\u4ef6\u7684\u5b58\u50a8\u5e93\u3002<\/p>\n<h2>\u6dfb\u52a0\u63d2\u4ef6<\/h2>\n<p>\u5982\u679c\u9009\u62e9\u4f7f\u7528Spring Boot 2.X \u7cfb\u5217\uff0c\u4f3c\u4e4e\u6dfb\u52a0\u4e86BOM\u9879\u76ee\uff0c\u73b0\u5728\u9700\u8981 dependency-management\u3002<br \/>\n\u6b64\u5916\uff0c\u8fd8\u9700\u8981\u6dfb\u52a0 net.ltgt.apt \u63d2\u4ef6\u3002\u4e00\u65e6\u8be5\u63d2\u4ef6\u88ab\u914d\u7f6e\uff0cGradle \u5c06\u4f1a\u5728\u751f\u6210\u57fa\u4e8e APT \u7684\u6e90\u4ee3\u7801\uff08\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u662f Q java \u6587\u4ef6\uff09\u65f6\uff0c\u5728\u4ee5\u4e0b\u6587\u4ef6\u5939\u4e2d\u751f\u6210\u6e90\u4ee3\u7801\u3002<\/p>\n<p>\/build\/generated\/source\/apt \u53ef\u4ee5\u7528\u4e2d\u56fd\u7684\u539f\u751f\u8bed\u8a00\u6539\u5199\u6210\uff1a\/\u6784\u5efa\/\u751f\u6210\u7684\/\u6e90\u7801\/apt<\/p>\n<pre class=\"post-pre\"><code>&lt;Project Root&gt;\r\n  |- build\r\n  |   |- classes\r\n  |   |     |- java\r\n  |   |     |    |- MembershipInfo.class\r\n  |   |     |    |- QMembershipInfo.class\r\n  |   |- generaeted\r\n  |   |     |- source\r\n  |   |     |   |- apt\r\n  |   |     |   |    |- QMembershipInfo.java\r\n\r\n<\/code><\/pre>\n<p>\u5982\u679c\u6ca1\u6709\u8fd9\u4e2a\u63d2\u4ef6\uff0c\u5728\u901a\u8fc7Gradle \u4f7f\u7528 APT \u751f\u6210\u6e90\u4ee3\u7801\u65f6\uff0c\u4f1a\u5728\u4e0e .class \u6587\u4ef6\u76f8\u540c\u7684\u76ee\u5f55\u4e2d\u751f\u6210 Q java \u6587\u4ef6\u3002<\/p>\n<p>\/build\/classes\/java is translated into Chinese as \/\u6784\u5efa\/\u7c7b\/Java.<\/p>\n<pre class=\"post-pre\"><code>&lt;Project Root&gt;\r\n   |- build\r\n   |    |- classes\r\n   |    |     |- java\r\n   |    |     |   |- MembershipInfo.class\r\n   |    |     |   |- QMembershipInfo.class\r\n   |    |     |   |- QMembershipInfo.java\r\n<\/code><\/pre>\n<p>\u4e0d\u9700\u8981\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u6df7\u5408\u6765\u81eaAPT\u751f\u6210\u7684\u6e90\u4ee3\u7801\uff0c\u56e0\u6b64\u53ef\u4ee5\u4f7f\u7528\u6b64\u63d2\u4ef6\u3002<\/p>\n<p>\u53c2\u8003io.spring.dependency-management\u63d2\u4ef6\u5728https:\/\/plugins.gradle.org\/plugin\/io.spring.dependency-management<\/p>\n<p>\u7528\u4e2d\u6587\u5c06\u4ee5\u4e0b\u5185\u5bb9\u6539\u5199\uff0c\u53ea\u63d0\u4f9b\u4e00\u79cd\u9009\u9879\uff1a<br \/>\nnet.ltgt.apt<br \/>\nhttps:\/\/plugins.gradle.org\/plugin\/net.ltgt.apt<\/p>\n<p>net.ltgt.apt<br \/>\nhttps:\/\/plugins.gradle.org\/plugin\/net.ltgt.apt\u7684\u4e2d\u6587\u91ca\u4e49\uff1a<\/p>\n<h2>\u2463 Java \u7248\u672c<\/h2>\n<p>\u5c06Java\u7248\u672c\u5347\u7ea7\u81f311\u3002<\/p>\n<h2>\u5c06Java\u6587\u4ef6\u4f5c\u4e3a\u6e90\u4ee3\u7801<\/h2>\n<p>\u9019\u88e1\u6210\u70ba\u4e86\u6700\u5927\u7684\u96e3\u95dc\u3002\u5728Java 1.8\u548cJava 11\u7248\u672c\u4e2d\uff0c IntelliJ IDEA\u51fa\u73fe\u4e86\u4ee5\u4e0b\u7684\u5dee\u7570\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java1.8<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">IntelliJ \u3067\u30d3\u30eb\u30c9\u3057\u3066\u3082 Q Java \u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3057\u306a\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java 11<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">IntelliJ \u3067\u30d3\u30eb\u30c9\u3059\u308b\u3068\u3001Q Java \u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3059\u308b\u3002\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u308b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306f\u3001out\/production\/classes\/generated \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u914d\u4e0b\u306b\u306a\u308b\u3002<\/ul>\n<p>\u4e5f\u8bb8\u6709\u4e00\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6539\u53d8\u8fd9\u4e2a\u52a8\u4f5c\uff0c\u4f46\u7531\u4e8e\u6211\u4e0d\u4e86\u89e3\uff0c\u6240\u4ee5\u6211\u9009\u62e9\u9075\u5faa IntelliJ \u7684\u9ed8\u8ba4\u64cd\u4f5c\u3002\u73b0\u5728\uff0c\u6bcf\u6b21\u5728 IntelliJ \u4e2d\u6784\u5efa\u65f6\uff0cout \u76ee\u5f55\u4e0b\u751f\u6210\u7684 Q java \u6587\u4ef6\u5c06\u88ab\u8bc6\u522b\u4e3a\u6e90\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;Project Root&gt;\r\n  |-out\r\n  |  |-production\r\n  |  |    |- classes\r\n  |  |    |     |- MembershipInfo.class\r\n  |  |    |     |- QMembershipInfo.class\r\n  |  |    |- genereated\r\n  |  |    |     |- QMembershipInfo.java\r\n<\/code><\/pre>\n<h2>\u2465 APT\u7684\u4f9d\u8d56\u6027<\/h2>\n<p>\u6839\u636eGitHub\u4e0a\u7684\u95ee\u9898\uff0c\u4eceGradle 5.0\u5f00\u59cb\uff0c\u5b83\u4e0d\u518d\u81ea\u52a8\u4ece\u7c7b\u8def\u5f84\u83b7\u53d6\u6ce8\u91ca\u5904\u7406\u5668\u3002<br \/>\n\u6839\u636e\u95ee\u9898\u9875\u9762\u7684\u63cf\u8ff0\uff0c\u9700\u8981\u660e\u786e\u5730\u5c06AnnotationProcessor\u6dfb\u52a0\u5230dependencies\u4e2d\u3002\u7531\u4e8elombok\u4e5f\u5728\u6d4b\u8bd5\u7c7b\u4e2d\u4f7f\u7528\uff0c\u6240\u4ee5\u8fd8\u9700\u8981\u6dfb\u52a0testAnnotationProcessor\u3002<\/p>\n<p>\u5728\u5b98\u65b9\u7f51\u9875\u4e0a\uff0c\u6211\u4eec\u88ab\u6307\u793a\u4e3a\u6bcf\u4e2a\u6ce8\u89e3\u5904\u7406\u5668\u5206\u522b\u5b9a\u4e49Annotation Processor\u3002\u56e0\u6b64\uff0cqueryDSL\u548clombok\u7684dependencies\u5c06\u4e0e\u666e\u901a\u7684dependencies\u5206\u5f00\u5b9a\u4e49\u3002<\/p>\n<blockquote><p>\u7531\u4e8e\u5b9e\u73b0\u7ec6\u8282\u5bf9\u4e8e\u6ce8\u89e3\u5904\u7406\u5668\u5f88\u91cd\u8981\uff0c\u5b83\u4eec\u5fc5\u987b\u5728\u6ce8\u89e3\u5904\u7406\u5668\u8def\u5f84\u4e0a\u5355\u72ec\u58f0\u660e\u3002Gradle\u4f1a\u5ffd\u7565\u7f16\u8bd1\u7c7b\u8def\u5f84\u4e0a\u7684\u6ce8\u89e3\u5904\u7406\u5668\u3002<\/p><\/blockquote>\n<p>\u53e6\u5916\uff0c\u5bf9\u4e8e queryDSL \u7684\u4f9d\u8d56\u4e2d\u7684 AnnotationProcessor\uff0c\u6211\u6307\u5b9a\u4e86\u4ee5\u4e0b\u4e09\u4e2a\u53c2\u6570\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>com.querydsl:querydsl-apt:${queryDSLVersion}:jpa<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>javax.annotation:javax.annotation-api:1.3.2<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>org.hibernate.javax.persistence:hibernate-jpa-2.1-api:1.0.2.Final<\/ol>\n<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u662f\u4e2d\u6587\u7ffb\u8bd1\u7684\u9009\u9879\uff1a<\/p>\n<p>com.querydsl:querydsl-apt:${queryDSLVersion}:jpa<br \/>\njavax.annotation:javax.annotation-api:1.3.2<br \/>\norg.hibernate.javax.persistence:hibernate-jpa-2.1-api:1.0.2.Final<\/p>\n<p>\u5173\u4e8e\u7b2c\u4e00\u70b9\uff0c\u9700\u8981\u4f7f\u7528QueryDSL\u7684APT\uff0c\u5e76\u4e14\u5728\u7248\u672c\u540e\u9762\u8bbe\u7f6e\u4e86&#8221;jpa&#8221;\u7684jar\u5f15\u7528\u3002\u5173\u4e8e\u7b2c\u4e8c\u548c\u7b2c\u4e09\u70b9\uff0c\u5982\u679c\u53ea\u6709\u7b2c\u4e00\u70b9\u7684\u63cf\u8ff0\uff0c\u5728\u901a\u8fc7IntelliJ\u8fdb\u884c\u91cd\u5efa\u548c\u6d4b\u8bd5\u65f6\u662f\u6210\u529f\u7684\uff0c\u4f46\u662f\u901a\u8fc7gralew\u7f16\u8bd1compileJava\u4efb\u52a1\u65f6\u4f1a\u751f\u6210\u5931\u8d25\uff0c\u53ef\u80fd\u662f\u7531\u4e8eQ java\u6587\u4ef6\u751f\u6210\u5931\u8d25\u5bfc\u81f4\u627e\u4e0d\u5230\u7b26\u53f7\u800c\u5bfc\u81f4\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>\/\/src\/main\/java\/jpaandquerydsl\/adapter\/EntityDSL.java:8: error: cannot find symbol\r\nimport QMemberInformation;\r\n<\/code><\/pre>\n<p>\u5f53\u5c062\u548c3\u4f5c\u4e3a\u53c2\u6570\u8bbe\u7f6e\u7ed9gradlew\u65f6\uff0ccompileJava\u4f1a\u6b63\u5e38\u901a\u8fc7gradlew\u5b8c\u6210\u3002<\/p>\n<p>\u53c2\u8003\u4e86Gradle 5.0\uff0c\u5bf9annotationProcessor\u8fdb\u884c\u4e86\u8c03\u67e5\u3002\u94fe\u63a5\u5982\u4e0b\uff1a<br \/>\nhttps:\/\/qiita.com\/opengl-8080\/items\/08a9cbe973fad53d93a7<\/p>\n<p>\u5728Gradle\u548cIntelliJ IDEA\u4e2d\u4f7f\u7528QueryDSL\u6ce8\u91ca\u5904\u7406\u5668<\/p>\n<h2>\u2466 \u5728 Gradle \u6267\u884c\u65f6\u7684\u884c\u4e3a<\/h2>\n<p>\u5728Gradle\u4e2d\u6267\u884ccompileJava\u4efb\u52a1\u65f6\uff0c\u4f1a\u5728build\u76ee\u5f55\u4e0b\u751f\u6210Q java\u6587\u4ef6\u3002\u5728\u751f\u6210Q java\u6587\u4ef6\u65f6\uff0c\u901a\u5e38\u4f1a\u5728out\u76ee\u5f55\u4e0b\u7684generated\u6587\u4ef6\u5939\u4e2d\u751f\u6210\u7531IntelliJ\u751f\u6210\u7684Q java\u6587\u4ef6\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u5728Gradle\u4e2d\u6267\u884ccompileJava\u4efb\u52a1\u65f6\uff0cout\u76ee\u5f55\u4e0b\u7684generated\u6587\u4ef6\u5939\u4e2d\u5b58\u5728Q java\u6587\u4ef6\uff0c\u5c31\u4f1a\u53d1\u751f\u4e0b\u9762\u7684\u9519\u8bef\uff0c\u5bfc\u81f4\u4efb\u52a1\u5931\u8d25\u3002<\/p>\n<pre class=\"post-pre\"><code>error: Attempt to recreate a file for type QMemberShipInfo.java\r\n<\/code><\/pre>\n<p>\u4e3a\u4e86\u907f\u514d\u5728\u5df2\u5b58\u5728\u7684\u6e90\u4ee3\u7801\u4f4d\u7f6e\u4e0a\u751f\u6210\u76f8\u540c\u7684\u6e90\u4ee3\u7801\u5e76\u4e14\u5931\u8d25\uff0c\u6211\u4eec\u5c06\u5728\u6267\u884ccompileJava\u4e4b\u524d\uff0c\u5fc5\u987b\u5220\u9664out\/production\/classes\/generated\u76ee\u5f55\u4e0b\u7684\u6240\u6709\u5185\u5bb9\u3002\u7531\u4e8eout\/production\/classes\/generated\u4e0b\u7684Q java\u6587\u4ef6\u5df2\u88ab\u5220\u9664\uff0cGradle\u73b0\u5728\u53ef\u4ee5\u751f\u6210Q java\u6587\u4ef6\u3002<br \/>\n\u53e6\u4e00\u65b9\u9762\uff0ccompileJava\u4e2d\u9700\u8981\u5c06Q java\u6587\u4ef6\u653e\u7f6e\u5728build\u76ee\u5f55\u4e0b\uff0c\u4f46\u5728compileJava\u4efb\u52a1\u5b8c\u6210\u540e\uff0cQ java\u6587\u4ef6\u7684class\u6587\u4ef6\u5c06\u751f\u6210\u5728build\/classes\u6587\u4ef6\u5939\u4e0b\uff0c\u56e0\u6b64build\/generated\u76ee\u5f55\u4e2d\u7684Q java\u6587\u4ef6\u7684\u4efb\u52a1\u5df2\u7ecf\u5b8c\u6210\u3002<\/p>\n<p>\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879\uff0c\u8bf7\u7528\u4e2d\u6587\u91cd\u65b0\u8868\u8fbe\u4ee5\u4e0b\u5185\u5bb9\uff1a<br \/>\n\u76f8\u53cd\u5730\uff0cIntelliJ\u5c06\u5f15\u7528\u7684Q java\u6587\u4ef6\u9700\u8981\u653e\u7f6e\u5728out\/production\/classes\/generated\u6587\u4ef6\u5939\u4e0b\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728compileJava\u7ed3\u675f\u540e\uff0cbuild\/generated\u6587\u4ef6\u5939\u4e0b\u7684Q java\u6587\u4ef6\u5c06\u4e0d\u518d\u9700\u8981\uff0c\u800c\u662f\u5fc5\u987b\u653e\u7f6e\u5728out\/production\/classes\/generated\u6587\u4ef6\u5939\u4e0b\u3002<br \/>\n\u56e0\u6b64\uff0c\u5f53compileJava\u7ed3\u675f\u65f6\uff0c\u6211\u4eec\u5fc5\u987b\u786e\u4fdd\u59cb\u7ec8\u6267\u884ccleanUpQueryDsl\u4efb\u52a1\u3002<\/p>\n<p>\u7f16\u8bd1Java\u4efb\u52a1\u7684\u6d41\u7a0b\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728\u5f00\u59cb\u7f16\u8bd1Java\u4e4b\u524d\uff0c\u5220\u9664 out\/production\/classes\/generated \u6587\u4ef6\u5939\u4e0b\u7684\u6240\u6709 Q.java \u6587\u4ef6\u3002\u7531\u4e8e\u9700\u8981\u9012\u5f52\u5220\u9664\u6587\u4ef6\u5939\uff0c\u56e0\u6b64\u9700\u8981\u6307\u5b9a\u6587\u4ef6\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5f53\u6267\u884ccompileJava\u65f6\uff0c\u7531\u4e8eltgt\u63d2\u4ef6\u7684\u5e2e\u52a9\uff0c\u4f1a\u5728build\/generated\u6587\u4ef6\u5939\u4e0b\u751f\u6210Q.java\u6587\u4ef6\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728compileJava\u7ed3\u675f\u540e\uff0c\u5c06build\/generated\u6587\u4ef6\u5939\u4e0b\u7684\u6240\u6709Q.java\u6587\u4ef6\u590d\u5236\u5230out\/production\/classes\/generated\u6587\u4ef6\u5939\u4e0b\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u5728Q.java\u6587\u4ef6\u590d\u5236\u5b8c\u6210\u540e\uff0c\u5220\u9664\u4e0d\u518d\u9700\u8981\u7684build\/generated\u6587\u4ef6\u5939\u4e0b\u7684\u6240\u6709Q.java\u6587\u4ef6\u3002<\/ol>\n<p>\u7531\u4e8e\u8fd9\u4e2a\u64cd\u4f5c\uff0c\u4e0eJava 1.8\u4e0d\u540c\u7684\u662f\uff0c\u4e0d\u518d\u9700\u8981\u5728src\/generated\u76ee\u5f55\u4e0b\u751f\u6210Q Java\u6587\u4ef6\u3002<br \/>\n\u56e0\u6b64\uff0c\u6211\u4eec\u5c06\u5220\u9664\u5728src\/generated\u6587\u4ef6\u5939\u4e0b\u751f\u6210Q Java\u6587\u4ef6\u7684\u4efb\u52a1generateQueryDSL\u3002<\/p>\n<h2>\u6e05\u6f54\u6642\u7684\u884c\u70ba\u3002<\/h2>\n<p>\u4e0d\u4e00\u5b9a\u5fc5\u8981\uff0c\u4f46\u6267\u884cclean\u64cd\u4f5c\u65f6\u4f1a\u5220\u9664Q.java\u6587\u4ef6\u3002<br \/>\n\u5728Java 1.8\u4e4b\u524d\uff0c\u6211\u4eec\u5220\u9664\u4e86src\/generated\u76ee\u5f55\u4e0b\u7684Q.java\u6587\u4ef6\uff0c\u4f46\u5728\u5347\u7ea7\u5230Java 11\u4e4b\u540e\uff0c\u8be5\u6587\u4ef6\u5939\u4e0d\u518d\u751f\u6210\u3002<br \/>\n\u6211\u4eec\u5c06\u5220\u9664build\u548cout\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6\u5939\u3002<\/p>\n<h1>\u5176\u4ed6\u66f4\u6539<\/h1>\n<p>\u6b64\u5916\uff0c\u8fd8\u5217\u4e3e\u4e86\u5173\u4e8eJava\u548cSpring\u9700\u8981\u8fdb\u884c\u66f4\u6539\u7684\u95ee\u9898\u3002<\/p>\n<h2>\u53d6\u6d88TestComponent<\/h2>\n<p>\u7531\u4e8e\u5c06Spring Boot\u5347\u7ea7\u52302.x\u7248\u672c\u540e\uff0c\u4f7f\u7528@TestComponent\u6ce8\u89e3\u7684\u7c7b\u4e0d\u518d\u751f\u6210\u4e3aBean\uff0c\u5bfc\u81f4\u6ce8\u5165\u5931\u8d25\u3002\u56e0\u6b64\uff0c\u5c06@TestComponent\u6ce8\u89e3\u66f4\u6539\u4e3a@Component\u3002<\/p>\n<h2>\u5141\u8bb8\u91cd\u5199Bean\u7684\u8bed\u53e5<\/h2>\n<p>\u5728\u751f\u4ea7\u4ee3\u7801\u4e2d\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a dataSource \u7684\u65b9\u6cd5\uff0c\u540c\u65f6\u5728\u53e6\u4e00\u4e2a\u6d4b\u8bd5\u7c7b\u4e2d\u4e5f\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a dataSource \u7684\u65b9\u6cd5\u3002<\/p>\n<ul class=\"post-ul\">\u30d7\u30ed\u30c0\u30af\u30b7\u30e7\u30f3<\/ul>\n<pre class=\"post-pre\"><code>    <span class=\"nd\">@Bean<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">DataSource<\/span> <span class=\"nf\">dataSource<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n\r\n        <span class=\"nc\">DriverManagerDataSource<\/span> <span class=\"n\">dataSource<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">DriverManagerDataSource<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">dataSource<\/span><span class=\"o\">.<\/span><span class=\"na\">setDriverClassName<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.driver-class-name\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">dataSource<\/span><span class=\"o\">.<\/span><span class=\"na\">setUrl<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.url\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">dataSource<\/span><span class=\"o\">.<\/span><span class=\"na\">setUsername<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.username\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">dataSource<\/span><span class=\"o\">.<\/span><span class=\"na\">setPassword<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.password\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">TransactionAwareDataSourceProxy<\/span><span class=\"o\">(<\/span><span class=\"n\">dataSource<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u30c6\u30b9\u30c8<\/ul>\n<pre class=\"post-pre\"><code>    <span class=\"nd\">@Bean<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">TransactionAwareDataSourceProxy<\/span> <span class=\"nf\">dataSource<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">net<\/span><span class=\"o\">.<\/span><span class=\"na\">sf<\/span><span class=\"o\">.<\/span><span class=\"na\">log4jdbc<\/span><span class=\"o\">.<\/span><span class=\"na\">sql<\/span><span class=\"o\">.<\/span><span class=\"na\">jdbcapi<\/span><span class=\"o\">.<\/span><span class=\"na\">DataSourceSpy<\/span> <span class=\"n\">proxyDs<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"s\">\"jdbc:log4jdbc:h2:mem:testDB;MODE=MySQL;DB_CLOSE_ON_EXIT=FALSE\"<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.url\"<\/span><span class=\"o\">)))<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"nc\">EmbeddedDatabase<\/span> <span class=\"n\">ds<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">EmbeddedDatabaseBuilder<\/span><span class=\"o\">().<\/span><span class=\"na\">setType<\/span><span class=\"o\">(<\/span><span class=\"nc\">EmbeddedDatabaseType<\/span><span class=\"o\">.<\/span><span class=\"na\">H2<\/span><span class=\"o\">).<\/span><span class=\"na\">build<\/span><span class=\"o\">();<\/span>\r\n            <span class=\"n\">proxyDs<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"n\">net<\/span><span class=\"o\">.<\/span><span class=\"na\">sf<\/span><span class=\"o\">.<\/span><span class=\"na\">log4jdbc<\/span><span class=\"o\">.<\/span><span class=\"na\">sql<\/span><span class=\"o\">.<\/span><span class=\"na\">jdbcapi<\/span><span class=\"o\">.<\/span><span class=\"na\">DataSourceSpy<\/span><span class=\"o\">(<\/span><span class=\"n\">ds<\/span><span class=\"o\">);<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">TransactionAwareDataSourceProxy<\/span><span class=\"o\">(<\/span><span class=\"n\">proxyDs<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"nc\">DriverManagerDataSource<\/span> <span class=\"n\">dataSource<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">DriverManagerDataSource<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">proxyDs<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"n\">net<\/span><span class=\"o\">.<\/span><span class=\"na\">sf<\/span><span class=\"o\">.<\/span><span class=\"na\">log4jdbc<\/span><span class=\"o\">.<\/span><span class=\"na\">sql<\/span><span class=\"o\">.<\/span><span class=\"na\">jdbcapi<\/span><span class=\"o\">.<\/span><span class=\"na\">DataSourceSpy<\/span><span class=\"o\">(<\/span><span class=\"n\">dataSource<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">dataSource<\/span><span class=\"o\">.<\/span><span class=\"na\">setDriverClassName<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.driver-class-name\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">dataSource<\/span><span class=\"o\">.<\/span><span class=\"na\">setUrl<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.url\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">dataSource<\/span><span class=\"o\">.<\/span><span class=\"na\">setUsername<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.username\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">dataSource<\/span><span class=\"o\">.<\/span><span class=\"na\">setPassword<\/span><span class=\"o\">(<\/span><span class=\"n\">environment<\/span><span class=\"o\">.<\/span><span class=\"na\">getProperty<\/span><span class=\"o\">(<\/span><span class=\"s\">\"spring.datasource.password\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">TransactionAwareDataSourceProxy<\/span><span class=\"o\">(<\/span><span class=\"n\">proxyDs<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u79cd\u72b6\u6001\u4e0b\u8fd0\u884c\u5e94\u7528\u7a0b\u5e8f\u7684\u7ed3\u679c\u662f\u53d1\u751f\u4e86BeanDefinitionOverrideException\u5f02\u5e38\u3002<\/p>\n<pre class=\"post-pre\"><code>Caused by: org.springframework.beans.factory.support.BeanDefinitionOverrideException: Invalid bean definition with name 'dataSource' defined in com.kasakaid.jpaandquerydsl.spring.TestConfig: Cannot register bean definition [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=testConfig; factoryMethodName=dataSource; initMethodName=null; destroyMethodName=(inferred); defined in com.kasakaid.jpaandquerydsl.spring.TestConfig] for bean 'dataSource': There is already [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=config; factoryMethodName=dataSource; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [com\/kasakaid\/jpaandquerydsl\/spring\/Config.class]] bound.\r\n    at org.springframework.beans.factory.support.DefaultListableBeanFactory.registerBeanDefinition(DefaultListableBeanFactory.java:894)\r\n    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:274)\r\n    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:141)\r\n    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:117)\r\n    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:327)\r\n    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:232)\r\n    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275)\r\n    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95)\r\n    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:691)\r\n    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:528)\r\n    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)\r\n    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)\r\n    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)\r\n    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:127)\r\n    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)\r\n    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117)\r\n    ... 24 more\r\n\r\n<\/code><\/pre>\n<p>\u6839\u636eGitHub\u95ee\u9898\uff0cSpring Boot\u9ed8\u8ba4\u4e0d\u5141\u8bb8\u8986\u76d6bean\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u5728\u7528\u4e8e\u751f\u4ea7\u548c\u6d4b\u8bd5\u7684application.properties\u6587\u4ef6\u4e2d\u6dfb\u52a0\u4e86\u914d\u7f6e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"py\">spring.main.allow-bean-definition-overriding<\/span><span class=\"p\">=<\/span><span class=\"s\">true<\/span>\r\n<\/code><\/pre>\n<blockquote><p>Spring Boot 2.1.x \u9ed8\u8ba4\u7981\u7528\u4e86\u5bf9\u6b64\u7c7b\u578b\u7684Bean\u7684\u8986\u76d6\u529f\u80fd\u3002\u8bf7\u5c1d\u8bd5\u5728\u5e94\u7528\u5c5e\u6027\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u884c\uff1a<br \/>\nspring.main.allow-bean-definition-overriding=true<br \/>\n\u8fd9\u5c06\u91cd\u65b0\u542f\u7528\u5148\u524d\u7684\u884c\u4e3a\u3002<\/p><\/blockquote>\n<h2>\u6539\u53d8 GeneratedValue \u7684\u503c<\/h2>\n<p>\u4f7f\u7528JPA\u65f6\uff0c\u9700\u8981\u4f7f\u7528@GeneratedValue\u6765\u6307\u5b9aID\u7684\u751f\u6210\u65b9\u6cd5\u3002\u5982\u679c\u5728\u4f7f\u7528SpringConnectionProvider\u5171\u5b58JPA\u548cQueryDSL\u65f6\uff0c\u6307\u5b9a\u9ed8\u8ba4\u503cGenerationType.AUTO\uff0c\u4f1a\u51fa\u73b0hibernate_sequence\u4e0d\u5b58\u5728\u7684\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Schema-validation: missing sequence [hibernate_sequence]\r\n    at org.hibernate.tool.schema.internal.AbstractSchemaValidator.validateSequence(AbstractSchemaValidator.java:184)\r\n    at org.hibernate.tool.schema.internal.AbstractSchemaValidator.performValidation(AbstractSchemaValidator.java:100)\r\n    at org.hibernate.tool.schema.internal.AbstractSchemaValidator.doValidation(AbstractSchemaValidator.java:68)\r\n    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:191)\r\n    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72)\r\n    at org.hibernate.internal.SessionFactoryImpl.&lt;init&gt;(SessionFactoryImpl.java:310)\r\n    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467)\r\n    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939)\r\n    at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:57)\r\n    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365)\r\n    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:390)\r\n    ... 43 more\r\n\r\n<\/code><\/pre>\n<p>\u6307\u5b9a\u660e&#8221;Generation Type&#8221;\uff0c\u4f1a\u6d88\u9664\u9519\u8bef\u3002<br \/>\n\u4e0b\u9762\u7684\u60c5\u51b5\uff0c\u901a\u8fc7\u4f7f\u7528&#8221;IDENTITY&#8221;\u6765\u907f\u514d\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@Id<\/span>\r\n<span class=\"nd\">@GeneratedValue<\/span><span class=\"o\">(<\/span><span class=\"n\">strategy<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">GenerationType<\/span><span class=\"o\">.<\/span><span class=\"na\">IDENTITY<\/span><span class=\"o\">)<\/span>\r\n<span class=\"kd\">private<\/span> <span class=\"nc\">Integer<\/span> <span class=\"n\">id<\/span><span class=\"o\">;<\/span>\r\n<\/code><\/pre>\n<h2>\u627e\u5230\u4e00\u4e2a\u66ff\u4ee3findOne\u65b9\u6cd5<\/h2>\n<p>JpaRepository \u4e2d\u7684 findOne \u65b9\u6cd5\u5df2\u88ab\u5f03\u7528\u3002\u9700\u8981\u4f7f\u7528 Optional findById(S) \u6765\u66ff\u4ee3\u3002<\/p>\n<h2>\u89e3\u51b3&#8221;hibernate.dialect&#8221;\u672a\u8bbe\u7f6e\u7684\u95ee\u9898\u3002<\/h2>\n<p>\u7531\u4e8e\u53d1\u751f\u4e86\u4e0b\u8ff0\u9519\u8bef\uff0c\u6211\u660e\u786e\u5730\u5c06\u4f7f\u7528\u7684\u6570\u636e\u5e93\u6dfb\u52a0\u5230\u4e86application-.properties\u6587\u4ef6\u4e2d\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u5c06\u5176\u6dfb\u52a0\u5230\u4e86application-development.properties\u6587\u4ef6\u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"py\">spring.jpa.database<\/span><span class=\"p\">=<\/span><span class=\"s\">mysql<\/span>\r\n<\/code><\/pre>\n<p>\u53d1\u751f\u7684\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set\r\n    at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:100)\r\n    .... omitted .......\r\n    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:94)\r\n    at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263)\r\n    ... 28 more\r\n<\/code><\/pre>\n<h1>\u586b\u8865<\/h1>\n<p>\u6211\u8ba4\u4e3a\u4f7f\u7528QueryDSL\u7684\u597d\u5904\u6709\u4ee5\u4e0b\u51e0\u70b9\u3002<\/p>\n<h2>\u4e0d\u9700\u8981\u4f7f\u7528\u6587\u5b57\u4e32\u62fc\u63a5\u67e5\u8be2\u3002<\/h2>\n<p>\u53ef\u4ee5\u4f7f\u7528\u65b9\u6cd5\u94fe\u6765\u6784\u5efa\u53ef\u8bfb\u6027\u8f83\u9ad8\u7684 Java \u6e90\u4ee3\u7801\uff0c\u5e76\u7ec4\u88c5\u67e5\u8be2\u3002\u4ee5\u4e0b\u4e3a\u4ee5\u7b80\u5355\u5f62\u5f0f\u5728\u4ee3\u7801\u5e93\u4e2d\u8fdb\u884c\u63cf\u8ff0\uff0c\u4f46\u8fd8\u53ef\u4ee5\u521b\u5efaQueryDSL\u7c7b\u4f5c\u4e3a\u53ef\u91cd\u7528\u7ec4\u4ef6\u6765\u7528\u4e8e\u67e5\u8be2\u3002<br \/>\n\u751f\u6210\u7684\u67e5\u8be2\u5728\u8fd0\u884c\u65f6\u51e0\u4e4e\u7b49\u540c\u4e8eQueryDSL\u7684\u65b9\u6cd5\uff0c\u56e0\u6b64\u60a8\u4e0d\u5fc5\u62c5\u5fc3\u4f7f\u7528HQL\u4f1a\u5bfc\u81f4\u7684\u96be\u4ee5\u7406\u89e3\u7684\u9519\u8bef\u3002\u6545\u969c\u6392\u9664\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">MemberInformationRepository<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">QMemberInformation<\/span> <span class=\"n\">member<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">QMemberInformation<\/span><span class=\"o\">.<\/span><span class=\"na\">memberInformation<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">QMemberInformation<\/span> <span class=\"n\">m<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">QMemberInformation<\/span><span class=\"o\">(<\/span><span class=\"s\">\"m\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">MemberInformation<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">find<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">sqlQueryFactory<\/span><span class=\"o\">.<\/span><span class=\"na\">select<\/span><span class=\"o\">(<\/span>\r\n                <span class=\"nc\">Projections<\/span><span class=\"o\">.<\/span><span class=\"na\">constructor<\/span><span class=\"o\">(<\/span><span class=\"nc\">MemberInformation<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">,<\/span>\r\n                        <span class=\"n\">m<\/span><span class=\"o\">.<\/span><span class=\"na\">artistId<\/span><span class=\"o\">.<\/span><span class=\"na\">as<\/span><span class=\"o\">(<\/span><span class=\"n\">m<\/span><span class=\"o\">.<\/span><span class=\"na\">artistId<\/span><span class=\"o\">),<\/span>\r\n                        <span class=\"n\">m<\/span><span class=\"o\">.<\/span><span class=\"na\">memberId<\/span>\r\n                <span class=\"o\">)<\/span>\r\n        <span class=\"o\">)<\/span>\r\n                <span class=\"o\">.<\/span><span class=\"na\">from<\/span><span class=\"o\">(<\/span><span class=\"n\">member<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"o\">.<\/span><span class=\"na\">fetch<\/span><span class=\"o\">()<\/span>\r\n                <span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u4e0d\u9700\u8981\u5b9a\u4e49\u4e0d\u5e26\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570<\/h2>\n<p>\u4f7f\u7528Hibernate\u65f6\uff0c\u5fc5\u987b\u4e3a\u5b9e\u4f53\u5b9a\u4e49\u4e00\u4e2a\u65e0\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u3002\u65e0\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u4f7f\u5f97\u5b9e\u4f53\u53ef\u4ee5\u751f\u6210\u4e0d\u7b26\u5408\u5176\u672c\u6765\u72b6\u6001\u7684\u5bf9\u8c61\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8eMemberInformation\u5b9e\u4f53\uff0c\u5fc5\u987b\u8bbe\u7f6eartistId\u548cmemberId\uff0c\u4f46\u5982\u679c\u5b9a\u4e49\u4e86\u65e0\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\uff0c\u90a3\u4e48\u8fd9\u4e2a\u524d\u63d0\u5c31\u88ab\u7834\u574f\u4e86\u3002\u65e0\u6cd5\u4ece\u6e90\u4ee3\u7801\u4e2d\u660e\u786e\u5f97\u77e5\u4e0d\u80fd\u4f7f\u7528\u65e0\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u6b63\u3057\u3044\u5229\u7528\u65b9\u6cd5<\/span>\r\n<span class=\"nc\">MemberInformation<\/span> <span class=\"n\">valid<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">MemberInformation<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ \u8aa4\u3063\u305f\u5229\u7528\u65b9\u6cd5<\/span>\r\n<span class=\"nc\">MemberInformation<\/span> <span class=\"n\">inValid<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">MemberInformation<\/span><span class=\"o\">();<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5141\u8bb8\u9519\u8bef\u7684\u4f7f\u7528\u65b9\u6cd5\u7684\u9636\u6bb5\uff0c\u6211\u8ba4\u4e3aHibernate\u5b58\u5728\u7f3a\u9677\uff0c\u5e76\u4e14\u8fd9\u4e2a\u7f3a\u9677\u4f1a\u5e26\u6765\u8f83\u9ad8\u7684\u98ce\u9669\u3002\u901a\u8fc7\u4e0d\u518d\u4f9d\u8d56Hibernate\u6765\u8fdb\u884c\u6570\u636e\u83b7\u53d6\uff08\u4e5f\u4e0d\u4f7f\u7528HQL\uff09\uff0c\u5c31\u4e0d\u9700\u8981\u5b9a\u4e49\u65e0\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u3002\u60a8\u53ef\u4ee5\u5b89\u5168\u5730\u4f7f\u7528\u5b9e\u4f53\u3002<br \/>\n\u7136\u800c\uff0c\u5373\u4f7f\u4f7f\u7528QueryDSL\u4e5f\u53ef\u80fd\u5b58\u5728\u98ce\u9669\u3002\u5c06\u5b9e\u4f53\u53d8\u6210\u6570\u636e\u5bb9\u5668\uff0c\u901a\u8fc7\u4e3a\u6240\u6709\u5b57\u6bb5\u63d0\u4f9bSetter\u7684\u65b9\u5f0f\u53ef\u4ee5\u5c06\u6570\u636e\u8bbe\u7f6e\u5230\u5b9e\u4f53\u4e2d\u3002<\/p>\n<p>\u5728 Setter \u91cc\u8bbe\u7f6e\u6570\u636e<\/p>\n<blockquote><p>List dtos = query.select(<br \/>\nProjections.bean(UserDTO.class, user.firstName, user.lastName)).fetch();<\/p>\n<p>\u5217\u8868 dtos = \u67e5\u8be2.select(<br \/>\nProjections.bean(UserDTO.class, user.firstName, user.lastName)).\u83b7\u53d6();<\/p><\/blockquote>\n<p>\u6211\u8ba4\u4e3a\u4e0d\u9700\u8981\u5bf9 Setter \u8fdb\u884c\u5b9e\u73b0\u7684\u539f\u56e0\u662f\uff0c\u5982\u679c\u5728 Setter \u4e2d\u53ef\u4ee5\u8bbe\u7f6e\u6570\u636e\uff0c\u90a3\u4e48\u5728\u5b9e\u4f8b\u751f\u6210\u540e\uff0c\u4efb\u4f55\u65f6\u5019\u3001\u4efb\u4f55\u5730\u65b9\u90fd\u53ef\u4ee5\u4ece\u5916\u90e8\u8bbe\u7f6e\u6570\u636e\u3002\u5373\u4f7f\u5728\u7528\u4e8e\u6ca1\u6709\u884c\u4e3a\u7684 DTO \u4e0a\u8bbe\u7f6e\u6570\u636e\uff0c\u4e5f\u53ef\u80fd\u51fa\u73b0\u610f\u60f3\u4e0d\u5230\u7684\u526f\u4f5c\u7528\u3002\u4e3a\u4e86\u4f7f\u5bf9\u8c61\u6210\u4e3a\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff0c\u6211\u8ba4\u4e3a\u66f4\u597d\u7684\u65b9\u6cd5\u662f\u4e0d\u4f7f\u7528 Projections.bean \u7684\u65b9\u5f0f\uff0c\u800c\u662f\u4f7f\u7528 Projections.constructor \u6765\u8bbe\u7f6e\u6570\u636e\u3002<\/p>\n<p>\u5728\u6784\u9020\u51fd\u6570\u4e2d\u8bbe\u7f6e\u6570\u636e<\/p>\n<blockquote><p>\u67e5\u8be2\u8bed\u53e5\u5982\u4e0b\uff1a<br \/>\nList dtos = query.select(<br \/>\nProjections.constructor(UserDTO.class, user.firstName, user.lastName)).fetch();<\/p><\/blockquote>\n<p>\u867d\u7136\u5728\u5b57\u6bb5\u4e0a\u76f4\u63a5\u8bbe\u7f6e\u6570\u636e\u7684\u65b9\u6cd5\u4e5f\u662f\u53ef\u884c\u7684\uff0c\u4f46\u662f\u6211\u8ba4\u4e3a\u5b9a\u4e49\u6784\u9020\u51fd\u6570\u5e76\u9690\u5f0f\u5730\u8bbe\u7f6e\u5b57\u6bb5\u503c\u4f1a\u66f4\u5bb9\u6613\u7406\u89e3\u3002\u5982\u679c\u4ece\u6784\u9020\u51fd\u6570\u4e2d\u8bbe\u7f6e\u6570\u636e\uff0c\u90a3\u4e48\u662f\u5426\u6784\u9020\u51fd\u6570\u8bbe\u7f6e\u6570\u636e\u66f4\u52a0\u660e\u663e\u5462\uff1f<\/p>\n<p>\u5b9a\u4e49\u4e00\u4e2a\u65e0\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u5e76\u4ece\u5b57\u6bb5\u4e2d\u8bbe\u7f6e\u6570\u636e\u4f1a\u4f7f\u5bf9\u8c61\u7684\u53ef\u7528\u6027\u975e\u5e38\u5dee\uff0c\u6240\u4ee5\u8fd9\u79cd\u65b9\u6cd5\u662f\u4e0d\u53ef\u53d6\u7684\u3002<\/p>\n<blockquote><p>List dtos = query.select(<br \/>\nProjections.fields(UserDTO.class, user.firstName, user.lastName)).fetch();<\/p><\/blockquote>\n<p>3.2. \u7ed3\u679c\u5904\u7406<br \/>\nhttp:\/\/www.querydsl.com\/static\/querydsl\/latest\/reference\/html\/ch03s02.html<\/p>\n<p>\u53c2\u8003\u6587\u732e\uff1a<\/p>\n<p>3.2. \u7ed3\u679c\u5904\u7406<br \/>\nhttp:\/\/www.querydsl.com\/static\/querydsl\/latest\/reference\/html\/ch03s02.html<\/p>\n<h2>\u53ef\u4ee5\u51cf\u5c11\u6807\u6ce8\u3002<\/h2>\n<p>\u4f7f\u7528Hibernate\u65f6\uff0c\u9700\u8981\u7f16\u5199\u4e0e\u9886\u57df\uff08\u4e1a\u52a1\u77e5\u8bc6\uff09\u65e0\u5173\u7684\u6ce8\u91ca\uff0c\u4f8b\u5982@Column\u6216@ManyToOne\u3002\u4e00\u65e6\u505c\u6b62\u4f7f\u7528Hibernate\uff0c\u8fd9\u79cd\u89c4\u5b9a\u5c06\u5b8c\u5168\u6d88\u5931\u3002\u53ea\u9700\u5728\u5b9e\u4f53\u4e0a\u8bbe\u7f6e\u5b9e\u4f53\u7684@Entity\u6ce8\u89e3\u5373\u53ef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u603b\u7ed3 \u5728\u5c06\u8fd0\u884c\u5728Java 8\u4e0a\u7684\u5e94\u7528\u7a0b\u5e8f\u8fc1\u79fb\u5230Java 11\u65f6\uff0c\u6211\u4eec\u8fdb\u884c\u4e86\u5b9e\u73b0\u65b9\u6cd5\u7684\u8c03\u67e5\u3002 \u7531\u4e8eSpring  [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-40240","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5c06Java 8\u7684Spring Boot + QueryDSL\u5e94\u7528\u7a0b\u5e8f\u5347\u7ea7\u81f3Java 11 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5c06java-8\u7684spring-boot-querydsl\u5e94\u7528\u7a0b\u5e8f\u5347\u7ea7\u81f3java-11\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" 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