{"id":39730,"date":"2023-08-16T04:36:00","date_gmt":"2023-01-30T18:58:47","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8spring-boot%e5%92%8cmybatis%e5%88%9b%e5%bb%ba%e4%b8%80%e4%b8%aahello-world%e7%9a%84%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f\/"},"modified":"2024-04-30T18:44:13","modified_gmt":"2024-04-30T10:44:13","slug":"%e4%bd%bf%e7%94%a8spring-boot%e5%92%8cmybatis%e5%88%9b%e5%bb%ba%e4%b8%80%e4%b8%aahello-world%e7%9a%84%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8spring-boot%e5%92%8cmybatis%e5%88%9b%e5%bb%ba%e4%b8%80%e4%b8%aahello-world%e7%9a%84%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f\/","title":{"rendered":"\u4f7f\u7528Spring Boot\u548cMyBatis\u521b\u5efa\u4e00\u4e2aHello World\u7684\u5e94\u7528\u7a0b\u5e8f"},"content":{"rendered":"

\u600e\u4e48\u4e86\uff1f le?)<\/h1>\n

\u6211\u4eec\u6765\u5c1d\u8bd5\u5728Spring Boot\u73af\u5883\u4e0b\u505a\u4e00\u4e2a\u7c7b\u4f3c\u4e8eMyBatis\u7684Hello World\u7684\u4e8b\u60c5\u3002<\/p>\n

\u73af\u5883<\/h1>\n

\u9019\u6b21\u7684\u74b0\u5883\u3002<\/p>\n

$ <\/span>java --version<\/span>\r\nopenjdk 11.0.15 2022-04-19\r\nOpenJDK Runtime Environment (<\/span>build 11.0.15+10-Ubuntu-0ubuntu0.20.04.1)<\/span>\r\nOpenJDK 64-Bit Server VM (<\/span>build 11.0.15+10-Ubuntu-0ubuntu0.20.04.1, mixed mode, sharing)<\/span>\r\n\r\n\r\n$ <\/span>mvn --version<\/span>\r\nApache Maven 3.8.5 (<\/span>3599d3414f046de2324203b78ddcf9b5e4388aa0)<\/span>\r\nMaven home: \/home\/charon\/.sdkman\/candidates\/maven\/current\r\nJava version: 11.0.15, vendor: Private Build, runtime: \/usr\/lib\/jvm\/java-11-openjdk-amd64\r\nDefault locale: ja_JP, platform encoding: UTF-8\r\nOS name: \"linux\"<\/span>, version: \"5.4.0-109-generic\"<\/span>, arch<\/span>: \"amd64\"<\/span>, family: \"unix\"<\/span>\r\n<\/code><\/pre>\n
\u6211\u51b3\u5b9a\u4f7f\u7528PostgreSQL 14.2\u4f5c\u4e3a\u6570\u636e\u5e93\uff0c\u5e76\u5728Docker\u4e2d\u51c6\u5907\u3002<\/p>\n
$ <\/span>docker container run \\<\/span>\r\n  -it<\/span> --rm<\/span> --name<\/span> postgres \\<\/span>\r\n  -p<\/span> 5432:5432 \\<\/span>\r\n  -e<\/span> POSTGRES_DB<\/span>=<\/span>example \\<\/span>\r\n  -e<\/span> POSTGRES_USER<\/span>=<\/span>charon \\<\/span>\r\n  -e<\/span> POSTGRES_PASSWORD<\/span>=<\/span>password \\<\/span>\r\n  postgres:14.2-bullseye\r\n<\/code><\/pre>\n
\u521b\u5efa\u4e00\u4e2aSpring Boot+MyBatis\u9879\u76ee<\/h1>\n
\u4f7f\u7528Spring Initializr\u521b\u5efa\u4e00\u4e2a\u53ef\u4ee5\u4f7f\u7528MyBatis\u7684Spring Boot\u9879\u76ee\u3002<\/p>\n
$ <\/span>curl -s<\/span> https:\/\/start.spring.io\/starter.tgz \\<\/span>\r\n  -d<\/span> bootVersion<\/span>=<\/span>2.6.7 \\<\/span>\r\n  -d<\/span> javaVersion<\/span>=<\/span>11 \\<\/span>\r\n  -d<\/span> name<\/span>=<\/span>spring-hello-mybatis \\<\/span>\r\n  -d<\/span> groupId<\/span>=<\/span>com.example \\<\/span>\r\n  -d<\/span> artifactId<\/span>=<\/span>hello-mybatis \\<\/span>\r\n  -d<\/span> version<\/span>=<\/span>0.0.1-SNAPSHOT \\<\/span>\r\n  -d<\/span> packageName<\/span>=<\/span>com.example.spring.mybatis \\<\/span>\r\n  -d<\/span> dependencies<\/span>=<\/span>mybatis,postgresql \\<\/span>\r\n  -d<\/span> baseDir<\/span>=<\/span>hello-mybatis | tar <\/span>zxvf -\r\n<\/code><\/pre>\n
\u8fdb\u5165\u76ee\u5f55\u5185\u3002<\/p>\n
$ <\/span>cd <\/span>hello-mybatis\r\n<\/code><\/pre>\n
\u4e0d\u9700\u8981\u4f7f\u7528\u81ea\u52a8\u751f\u6210\u7684\u6e90\u4ee3\u7801\uff0c\u56e0\u6b64\u5c06\u5176\u5220\u9664\u3002<\/p>\n
$ <\/span>rm <\/span>src\/main\/java\/com\/example\/spring\/mybatis\/SpringHelloMybatisApplication.java src\/test\/java\/com\/example\/spring\/mybatis\/SpringHelloMybatisApplicationTests.java\r\n<\/code><\/pre>\n
\u6211\u4e5f\u4f1a\u67e5\u770b\u4f9d\u5b58\u5173\u7cfb\u548c\u63d2\u4ef6\u8bbe\u7f6e\u7b49\u3002<\/p>\n
\t<properties><\/span>\r\n\t\t<java.version><\/span>11<\/java.version><\/span>\r\n\t<\/properties><\/span>\r\n\t<dependencies><\/span>\r\n\t\t<dependency><\/span>\r\n\t\t\t<groupId><\/span>org.mybatis.spring.boot<\/groupId><\/span>\r\n\t\t\t<artifactId><\/span>mybatis-spring-boot-starter<\/artifactId><\/span>\r\n\t\t\t<version><\/span>2.2.2<\/version><\/span>\r\n\t\t<\/dependency><\/span>\r\n\r\n\t\t<dependency><\/span>\r\n\t\t\t<groupId><\/span>org.postgresql<\/groupId><\/span>\r\n\t\t\t<artifactId><\/span>postgresql<\/artifactId><\/span>\r\n\t\t\t<scope><\/span>runtime<\/scope><\/span>\r\n\t\t<\/dependency><\/span>\r\n\t\t<dependency><\/span>\r\n\t\t\t<groupId><\/span>org.springframework.boot<\/groupId><\/span>\r\n\t\t\t<artifactId><\/span>spring-boot-starter-test<\/artifactId><\/span>\r\n\t\t\t<scope><\/span>test<\/scope><\/span>\r\n\t\t<\/dependency><\/span>\r\n\t<\/dependencies><\/span>\r\n\r\n\t<build><\/span>\r\n\t\t<plugins><\/span>\r\n\t\t\t<plugin><\/span>\r\n\t\t\t\t<groupId><\/span>org.springframework.boot<\/groupId><\/span>\r\n\t\t\t\t<artifactId><\/span>spring-boot-maven-plugin<\/artifactId><\/span>\r\n\t\t\t<\/plugin><\/span>\r\n\t\t<\/plugins><\/span>\r\n\t<\/build><\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528mvn dependency:tree\u547d\u4ee4\u67e5\u770b\uff0c\u53d1\u73b0\u5176\u4e2d\u5305\u62ec\u4e86spring-boot-starter\u548cspring-boot-starter-jdbc\uff0c\u6240\u4ee5\u53ea\u9700\u4f7f\u7528mybatis-spring-boot-starter\u5c31\u8db3\u591f\u4e86\u3002<\/p>\n
[<\/span>INFO] +- org.mybatis.spring.boot:mybatis-spring-boot-starter:jar:2.2.2:compile\r\n[<\/span>INFO] |  +- org.springframework.boot:spring-boot-starter:jar:2.6.7:compile\r\n[<\/span>INFO] |  |  +- org.springframework.boot:spring-boot:jar:2.6.7:compile\r\n[<\/span>INFO] |  |  |  \\-<\/span> org.springframework:spring-context:jar:5.3.19:compile\r\n[<\/span>INFO] |  |  |     +- org.springframework:spring-aop:jar:5.3.19:compile\r\n[<\/span>INFO] |  |  |     \\-<\/span> org.springframework:spring-expression:jar:5.3.19:compile\r\n[<\/span>INFO] |  |  +- org.springframework.boot:spring-boot-autoconfigure:jar:2.6.7:compile\r\n[<\/span>INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:2.6.7:compile\r\n[<\/span>INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.2.11:compile\r\n[<\/span>INFO] |  |  |  |  \\-<\/span> ch.qos.logback:logback-core:jar:1.2.11:compile\r\n[<\/span>INFO] |  |  |  +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.17.2:compile\r\n[<\/span>INFO] |  |  |  |  \\-<\/span> org.apache.logging.log4j:log4j-api:jar:2.17.2:compile\r\n[<\/span>INFO] |  |  |  \\-<\/span> org.slf4j:jul-to-slf4j:jar:1.7.36:compile\r\n[<\/span>INFO] |  |  +- jakarta.annotation:jakarta.annotation-api:jar:1.3.5:compile\r\n[<\/span>INFO] |  |  \\-<\/span> org.yaml:snakeyaml:jar:1.29:compile\r\n[<\/span>INFO] |  +- org.springframework.boot:spring-boot-starter-jdbc:jar:2.6.7:compile\r\n[<\/span>INFO] |  |  +- com.zaxxer:HikariCP:jar:4.0.3:compile\r\n[<\/span>INFO] |  |  \\-<\/span> org.springframework:spring-jdbc:jar:5.3.19:compile\r\n[<\/span>INFO] |  |     +- org.springframework:spring-beans:jar:5.3.19:compile\r\n[<\/span>INFO] |  |     \\-<\/span> org.springframework:spring-tx:jar:5.3.19:compile\r\n[<\/span>INFO] |  +- org.mybatis.spring.boot:mybatis-spring-boot-autoconfigure:jar:2.2.2:compile\r\n[<\/span>INFO] |  +- org.mybatis:mybatis:jar:3.5.9:compile\r\n[<\/span>INFO] |  \\-<\/span> org.mybatis:mybatis-spring:jar:2.0.7:compile\r\n<\/code><\/pre>\n
\u7f16\u5199\u6e90\u4ee3\u7801<\/h1>\n
\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u786e\u5b9a\u4e00\u4e2a\u684c\u5b50\u3002\u8fd9\u6b21\u6211\u4eec\u9009\u62e9\u8fd9\u4e2a\u4f5c\u4e3a\u4e3b\u9898\u3002<\/p>\n
drop<\/span> table<\/span> if<\/span> exists<\/span> person<\/span>;<\/span>\r\n\r\ncreate<\/span> table<\/span> person<\/span> (<\/span>\r\n  id<\/span> serial<\/span>,<\/span>\r\n  first_name<\/span> varchar<\/span>(<\/span>20<\/span>),<\/span>\r\n  last_name<\/span> varchar<\/span>(<\/span>20<\/span>),<\/span>\r\n  age<\/span> integer<\/span>,<\/span>\r\n  primary<\/span> key<\/span>(<\/span>id<\/span>)<\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u5199Java\u6e90\u4ee3\u7801\u3002<\/p>\n
\u5173\u4e8eMyBatis\uff0c\u6211\u4eec\u5c06\u4ee5\u8fd9\u4e2a\u4f5c\u4e3a\u53c2\u8003\u3002<\/p>\n
 <\/p>\n
\u6620\u5c04\u5230\u6570\u636e\u5e93\u8868\u683c\u7684\u6a21\u578b\u3002<\/p>\n
package<\/span> com.example.spring.mybatis<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Person<\/span> {<\/span>\r\n    Long<\/span> id<\/span>;<\/span>\r\n    String<\/span> firstName<\/span>;<\/span>\r\n    String<\/span> lastName<\/span>;<\/span>\r\n    Integer<\/span> age<\/span>;<\/span>\r\n\r\n    public<\/span> static<\/span> Person<\/span> create<\/span>(<\/span>String<\/span> firstName<\/span>,<\/span> String<\/span> lastName<\/span>,<\/span> Integer<\/span> age<\/span>)<\/span> {<\/span>\r\n        Person<\/span> person<\/span> =<\/span> new<\/span> Person<\/span>();<\/span>\r\n\r\n        person<\/span>.<\/span>setFirstName<\/span>(<\/span>firstName<\/span>);<\/span>\r\n        person<\/span>.<\/span>setLastName<\/span>(<\/span>lastName<\/span>);<\/span>\r\n        person<\/span>.<\/span>setAge<\/span>(<\/span>age<\/span>);<\/span>\r\n\r\n        return<\/span> person<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    \/\/ getter\u3001setter\u306f\u7701\u7565<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u521b\u5efa\u4e00\u4e2aMapper\u63a5\u53e3\u3002<\/p>\n
package<\/span> com.example.spring.mybatis<\/span>;<\/span>\r\n\r\nimport<\/span> java.util.List<\/span>;<\/span>\r\n\r\nimport<\/span> org.apache.ibatis.annotations.Insert<\/span>;<\/span>\r\nimport<\/span> org.apache.ibatis.annotations.Mapper<\/span>;<\/span>\r\nimport<\/span> org.apache.ibatis.annotations.Options<\/span>;<\/span>\r\nimport<\/span> org.apache.ibatis.annotations.Select<\/span>;<\/span>\r\n\r\n@Mapper<\/span>\r\npublic<\/span> interface<\/span> PersonMapper<\/span> {<\/span>\r\n    @Insert<\/span>(<\/span>\"insert into person(first_name, last_name, age) values(#{firstName}, #{lastName}, #{age})\"<\/span>)<\/span>\r\n    @Options<\/span>(<\/span>useGeneratedKeys<\/span> =<\/span> true<\/span>,<\/span> keyProperty<\/span> =<\/span> \"id\"<\/span>)<\/span>\r\n    int<\/span> insert<\/span>(<\/span>Person<\/span> person<\/span>);<\/span>\r\n\r\n    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person order by id\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findAll<\/span>();<\/span>\r\n\r\n    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person where last_name = #{lastName}\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findByLastName<\/span>(<\/span>String<\/span> lastName<\/span>);<\/span>\r\n\r\n    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person where last_name = #{lastName} and age > #{age}\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findByLastNameAndAge<\/span>(<\/span>Person<\/span> person<\/span>);<\/span>\r\n\r\n    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person where last_name = #{lastName} and age > #{age}\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findByLastNameAndAgePrimitive<\/span>(<\/span>String<\/span> lastName<\/span>,<\/span> int<\/span> age<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u672c\u6b21\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u6ce8\u89e3\u800c\u4e0d\u662fXML\u6587\u4ef6\u6765\u521b\u5efaMapper\u63a5\u53e3\u3002<\/p>\n
\u5bf9\u4e8e\u50cfBlogMapper\u8fd9\u6837\u7684\u6620\u5c04\u5668\u7c7b\uff0c\u8fd8\u6709\u4e00\u79cd\u66f4\u5de7\u5999\u7684\u65b9\u6cd5\u3002\u5b83\u4eec\u7684\u6620\u5c04\u8bed\u53e5\u6839\u672c\u4e0d\u9700\u8981\u901a\u8fc7XML\u8fdb\u884c\u6620\u5c04\uff0c\u800c\u662f\u53ef\u4ee5\u4f7f\u7528Java\u6ce8\u89e3\u3002<\/p><\/blockquote>\n
 <\/p>\n
\u5982\u679c\u7ed9\u4e88@Mapper\u6ce8\u89e3\uff0cMyBatis Spring Boot Starter\u4f1a\u81ea\u52a8\u68c0\u6d4b\u3002<\/p>\n
@Mapper<\/span>\r\npublic<\/span> interface<\/span> PersonMapper<\/span> {<\/span>\r\n<\/code><\/pre>\n
MyBatis-Spring-Boot-Starter\u9ed8\u8ba4\u4f1a\u641c\u7d22\u7528@Mapper\u6ce8\u89e3\u6807\u8bb0\u7684\u6620\u5c04\u5668\u3002<\/p><\/blockquote>\n
 <\/p>\n
\u63d2\u5165\u6587\u672c\u3002<\/p>\n
    @Insert<\/span>(<\/span>\"insert into person(first_name, last_name, age) values(#{firstName}, #{lastName}, #{age})\"<\/span>)<\/span>\r\n    @Options<\/span>(<\/span>useGeneratedKeys<\/span> =<\/span> true<\/span>,<\/span> keyProperty<\/span> =<\/span> \"id\"<\/span>)<\/span>\r\n    int<\/span> insert<\/span>(<\/span>Person<\/span> person<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u8981\u5c06\u53c2\u6570\u5d4c\u5165SQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528#{\u53d8\u91cf\u540d}\u6765\u8868\u793a\u3002<\/p>\n
\u53e6\u5916\uff0c\u7531\u65bc\u9019\u6b21\u4f7f\u7528\u4e86PostgreSQL\u7684\u5e8f\u5217\u985e\u578b\uff08serial\uff09\uff0c\u56e0\u6b64\u662f\u81ea\u52d5\u7de8\u865f\u3002<\/p>\n
\u8981\u4f7f\u7528\u6b64\u9009\u9879\uff0c\u9700\u8981\u5c06useGeneratedKeys\u8bbe\u7f6e\u4e3atrue\uff0c\u7136\u540e\u4f7f\u7528keyProperty\u5c5e\u6027\u5c06\u7f16\u53f7\u7ed3\u679c\u6620\u5c04\u5230\u6a21\u578b\u4e2d\u3002<\/p>\n
\u6620\u5c04\u5668\u7684 XML \u6587\u4ef6\/\u63d2\u5165\u3001\u66f4\u65b0\u548c\u5220\u9664<\/p>\n
\u5728\u8fd9\u4e2a\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u5c06\u4f7f\u7528@Options\u4f5c\u4e3a\u6ce8\u89e3\u3002<\/p>\n
\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9bselect\u8bed\u53e5\u7684\u53d8\u79cd\u3002<\/p>\n
    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person order by id\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findAll<\/span>();<\/span>\r\n\r\n    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person where last_name = #{lastName}\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findByLastName<\/span>(<\/span>String<\/span> lastName<\/span>);<\/span>\r\n\r\n    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person where last_name = #{lastName} and age > #{age}\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findByLastNameAndAge<\/span>(<\/span>Person<\/span> person<\/span>);<\/span>\r\n\r\n    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person where last_name = #{lastName} and age > #{age}\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findByLastNameAndAgePrimitive<\/span>(<\/span>String<\/span> lastName<\/span>,<\/span> int<\/span> age<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u6700\u5f8c\u4e00\u4e2a\u793a\u4f8b\u662f\u4e3a\u4e86\u786e\u8ba4\u591a\u4e2a\u53c2\u6570\uff0c\u4f46\u662f\u5982\u679c\u6709\u591a\u4e2a\u53c2\u6570\uff0c\u60a8\u9700\u8981\u901a\u8fc7@Param\u663e\u5f0f\u6307\u5b9a\u540d\u79f0\uff0c\u6216\u5728\u7f16\u8bd1\u65f6\u6307\u5b9a-parameters\u9009\u9879\u5e76\u5c06useActualParamName\u8bbe\u7f6e\u4e3atrue\uff08\u9ed8\u8ba4\u503c\uff09\u3002<\/p>\n
\u4ece3.4.3\u7248\u672c\u5f00\u59cb\uff0c\u901a\u8fc7\u6307\u5b9a\u6bcf\u4e2a\u53c2\u6570\u7684\u540d\u79f0\uff0c\u53ef\u4ee5\u4ee5\u4efb\u610f\u987a\u5e8f\u7f16\u5199arg\u5143\u7d20\u3002\u8981\u901a\u8fc7\u53c2\u6570\u540d\u79f0\u5f15\u7528\u6784\u9020\u51fd\u6570\u53c2\u6570\uff0c\u60a8\u53ef\u4ee5\u7ed9\u5b83\u4eec\u6dfb\u52a0@Param\u6ce8\u89e3\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528’-parameters’\u7f16\u8bd1\u5668\u9009\u9879\u7f16\u8bd1\u9879\u76ee\u5e76\u542f\u7528useActualParamName\uff08\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u5df2\u542f\u7528\u6b64\u9009\u9879\uff09\u3002<\/p><\/blockquote>\n
\u6620\u5c04\u5668XML\u6587\u4ef6\/\u7ed3\u679c\u6620\u5c04<\/p>\n
\u6b64\u6b21\u9879\u76ee\u662f\u4f7f\u7528Spring Initializr\u521b\u5efa\u7684\uff0c\u56e0\u6b64spring-boot-starter-parent\u6210\u4e3a\u4e86\u7236pom\uff0c\u5e76\u4e14\u5df2\u7ecf\u6307\u5b9a\u4e86-parameters\u3002\u6240\u4ee5\u6211\u4eec\u5c06\u5728\u8fd9\u4e2a\u524d\u63d0\u4e0b\u7ee7\u7eed\u8fdb\u884c\u3002<\/p>\n
 <\/p>\n
\u521b\u5efa\u4e00\u4e2a\u4f7f\u7528\u8fd9\u4e2aMapper\u63a5\u53e3\u7684\u7c7b\u3002<\/p>\n
package<\/span> com.example.spring.mybatis<\/span>;<\/span>\r\n\r\nimport<\/span> java.util.List<\/span>;<\/span>\r\n\r\nimport<\/span> org.slf4j.Logger<\/span>;<\/span>\r\nimport<\/span> org.slf4j.LoggerFactory<\/span>;<\/span>\r\nimport<\/span> org.springframework.boot.ApplicationArguments<\/span>;<\/span>\r\nimport<\/span> org.springframework.boot.ApplicationRunner<\/span>;<\/span>\r\nimport<\/span> org.springframework.stereotype.Component<\/span>;<\/span>\r\nimport<\/span> org.springframework.transaction.annotation.Transactional<\/span>;<\/span>\r\n\r\n@Component<\/span>\r\npublic<\/span> class<\/span> Runner<\/span> implements<\/span> ApplicationRunner<\/span> {<\/span>\r\n    Logger<\/span> logger<\/span> =<\/span> LoggerFactory<\/span>.<\/span>getLogger<\/span>(<\/span>Runner<\/span>.<\/span>class<\/span>);<\/span>\r\n    PersonMapper<\/span> personMapper<\/span>;<\/span>\r\n\r\n    public<\/span> Runner<\/span>(<\/span>PersonMapper<\/span> personMapper<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>personMapper<\/span> =<\/span> personMapper<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    @Transactional<\/span>\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> run<\/span>(<\/span>ApplicationArguments<\/span> args<\/span>)<\/span> throws<\/span> Exception<\/span> {<\/span>\r\n        \/\/ insert<\/span>\r\n        Person<\/span> maruko<\/span> =<\/span> Person<\/span>.<\/span>create<\/span>(<\/span>\"\u3082\u3082\u3053\"<\/span>,<\/span> \"\u3055\u304f\u3089\"<\/span>,<\/span> 9<\/span>);<\/span>\r\n        Person<\/span> sakiko<\/span> =<\/span> Person<\/span>.<\/span>create<\/span>(<\/span>\"\u3055\u304d\u3053\"<\/span>,<\/span> \"\u3055\u304f\u3089\"<\/span>,<\/span> 11<\/span>);<\/span>\r\n        Person<\/span> tamae<\/span> =<\/span> Person<\/span>.<\/span>create<\/span>(<\/span>\"\u305f\u307e\u3048\"<\/span>,<\/span> \"\u7a42\u6ce2\"<\/span>,<\/span> 9<\/span>);<\/span>\r\n\r\n        personMapper<\/span>.<\/span>insert<\/span>(<\/span>maruko<\/span>);<\/span>\r\n        personMapper<\/span>.<\/span>insert<\/span>(<\/span>sakiko<\/span>);<\/span>\r\n        personMapper<\/span>.<\/span>insert<\/span>(<\/span>tamae<\/span>);<\/span>\r\n\r\n        List<\/span>\r\n                .<\/span>of<\/span>(<\/span>maruko<\/span>,<\/span> sakiko<\/span>,<\/span> tamae<\/span>)<\/span>\r\n                .<\/span>forEach<\/span>(<\/span>p<\/span> -><\/span> logger<\/span>.<\/span>info<\/span>(<\/span>\"inserted: id = {}, first_name = {}, last_name = {}, age = {}\"<\/span>,<\/span> p<\/span>.<\/span>getId<\/span>(),<\/span> p<\/span>.<\/span>getFirstName<\/span>(),<\/span> p<\/span>.<\/span>getLastName<\/span>(),<\/span> p<\/span>.<\/span>getAge<\/span>()));<\/span>\r\n\r\n        \/\/ select all<\/span>\r\n        List<\/span><<\/span>Person<\/span>><\/span> allPeople<\/span> =<\/span> personMapper<\/span>.<\/span>findAll<\/span>();<\/span>\r\n        allPeople<\/span>.<\/span>forEach<\/span>(<\/span>p<\/span> -><\/span> logger<\/span>.<\/span>info<\/span>(<\/span>\"find all: id = {}, first_name = {}, last_name = {}, age = {}\"<\/span>,<\/span> p<\/span>.<\/span>getId<\/span>(),<\/span> p<\/span>.<\/span>getFirstName<\/span>(),<\/span> p<\/span>.<\/span>getLastName<\/span>(),<\/span> p<\/span>.<\/span>getAge<\/span>()));<\/span>\r\n\r\n        \/\/ select by last_name<\/span>\r\n        List<\/span><<\/span>Person<\/span>><\/span> sakuraFamily<\/span> =<\/span> personMapper<\/span>.<\/span>findByLastName<\/span>(<\/span>\"\u3055\u304f\u3089\"<\/span>);<\/span>\r\n        sakuraFamily<\/span>.<\/span>forEach<\/span>(<\/span>p<\/span> -><\/span> logger<\/span>.<\/span>info<\/span>(<\/span>\"find by last_name: id = {}, first_name = {}, last_name = {}, age = {}\"<\/span>,<\/span> p<\/span>.<\/span>getId<\/span>(),<\/span> p<\/span>.<\/span>getFirstName<\/span>(),<\/span> p<\/span>.<\/span>getLastName<\/span>(),<\/span> p<\/span>.<\/span>getAge<\/span>()));<\/span>\r\n\r\n        \/\/ select by object<\/span>\r\n        List<\/span><<\/span>Person<\/span>><\/span> results<\/span> =<\/span> personMapper<\/span>.<\/span>findByLastNameAndAge<\/span>(<\/span>Person<\/span>.<\/span>create<\/span>(<\/span>null<\/span>,<\/span> \"\u3055\u304f\u3089\"<\/span>,<\/span> 10<\/span>));<\/span>\r\n        results<\/span>.<\/span>forEach<\/span>(<\/span>p<\/span> -><\/span> logger<\/span>.<\/span>info<\/span>(<\/span>\"find by object: id = {}, first_name = {}, last_name = {}, age = {}\"<\/span>,<\/span> p<\/span>.<\/span>getId<\/span>(),<\/span> p<\/span>.<\/span>getFirstName<\/span>(),<\/span> p<\/span>.<\/span>getLastName<\/span>(),<\/span> p<\/span>.<\/span>getAge<\/span>()));<\/span>\r\n\r\n        \/\/ select by primitives<\/span>\r\n        List<\/span><<\/span>Person<\/span>><\/span> results2<\/span> =<\/span> personMapper<\/span>.<\/span>findByLastNameAndAgePrimitive<\/span>(<\/span>\"\u3055\u304f\u3089\"<\/span>,<\/span> 10<\/span>);<\/span>\r\n        results2<\/span>.<\/span>forEach<\/span>(<\/span>p<\/span> -><\/span> logger<\/span>.<\/span>info<\/span>(<\/span>\"find by primitives: id = {}, first_name = {}, last_name = {}, age = {}\"<\/span>,<\/span> p<\/span>.<\/span>getId<\/span>(),<\/span> p<\/span>.<\/span>getFirstName<\/span>(),<\/span> p<\/span>.<\/span>getLastName<\/span>(),<\/span> p<\/span>.<\/span>getAge<\/span>()));<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u63d2\u5165\u6570\u636e\u540e\uff0c\u6211\u5206\u522b\u6267\u884c\u4e86\u51c6\u5907\u597d\u7684SELECT\u8bed\u53e5\u3002<\/p>\n
\u6700\u540e\u662f\u4e3b\u8981\u7684\u7c7b\uff0c\u5373 main class\u3002<\/p>\n
package<\/span> com.example.spring.mybatis<\/span>;<\/span>\r\n\r\nimport<\/span> org.springframework.boot.SpringApplication<\/span>;<\/span>\r\nimport<\/span> org.springframework.boot.autoconfigure.SpringBootApplication<\/span>;<\/span>\r\n\r\n@SpringBootApplication<\/span>\r\npublic<\/span> class<\/span> App<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>...<\/span> args<\/span>)<\/span> {<\/span>\r\n        SpringApplication<\/span>.<\/span>run<\/span>(<\/span>App<\/span>.<\/span>class<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fdb\u884c\u8bbe\u7f6e<\/h1>\n
\u6211\u4eec\u4e5f\u6765\u8fdb\u884c\u4e00\u4e0b\u8bbe\u7f6e\u5427\u3002<\/p>\n
\u4f7f\u7528spring.datasource.*\u5c5e\u6027\u6765\u8bbe\u7f6e\u4e0e\u51c6\u5907\u597d\u7684PostgreSQL\u7684\u8fde\u63a5\u4fe1\u606f\u3002<\/p>\n
spring.datasource.url<\/span>=<\/span>jdbc:postgresql:\/\/localhost:5432\/example<\/span>\r\nspring.datasource.username<\/span>=<\/span>charon<\/span>\r\nspring.datasource.password<\/span>=<\/span>password<\/span>\r\n\r\nspring.sql.init.mode<\/span>=<\/span>always<\/span>\r\n\r\nmybatis.configuration.map-underscore-to-camel-case<\/span>=<\/span>true<\/span>\r\n<\/code><\/pre>\n
\u5c06spring.sql.init.mode\u8bbe\u7f6e\u4e3aalways\u662f\u4e3a\u4e86\u59cb\u7ec8\u6267\u884cschema.sql\u3002<\/p>\n
\u6211\u628amybatis.configuration.map-underscore-to-camel-case\u8bbe\u7f6e\u4e3atrue\u7684\u539f\u56e0\u662f\uff0c<\/p>\n
\u8fd9\u662f\u4e3a\u4e86\u5c06\u5728 Mapper \u63a5\u53e3\u4e2d\u521b\u5efa\u7684\u67e5\u8be2\u7ed3\u679c\u7684\u5217\u540d\u6620\u5c04\u5230 Java \u7684\u9a7c\u5cf0\u547d\u540d\u89c4\u5219\u5c5e\u6027\u3002<\/p>\n
    @Select<\/span>(<\/span>\"select id, first_name, last_name, age from person order by id\"<\/span>)<\/span>\r\n    List<\/span><<\/span>Person<\/span>><\/span> findAll<\/span>();<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u79cd\u5199\u6cd5\u7684\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u4e0d\u5c06mybatis.configuration.map-underscore-to-camel-case\u8bbe\u7f6e\u4e3atrue\uff0c\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c\u65f6\u4e0d\u4f1a\u8bbe\u7f6e\u5e26\u6709\u4e0b\u5212\u7ebf\u7684\u5217\u7684\u503c\u3002<\/p>\n
\u6620\u5c04\u5668XML\u6587\u4ef6\/\u81ea\u52a8\u6620\u5c04<\/p>\n
 <\/p>\n
\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u8bbe\u7f6eresultMap\u6765\u89e3\u51b3\u95ee\u9898\uff0c\u4f46\u662f\u8fd9\u6b21\u6211\u4eec\u5c06\u6309\u7167\u8fd9\u4e2a\u7b56\u7565\u8fdb\u884c\u3002<\/p>\n
\u8fdb\u884c<\/h1>\n
\u90a3\u4e48\uff0c\u6211\u5c06\u5c1d\u8bd5\u6267\u884c\u4e00\u4e0b\u3002<\/p>\n
$ <\/span>mvn spring-boot:run\r\n<\/code><\/pre>\n
\u65e5\u5fd7\u7684\u7ed3\u679c\u3002<\/p>\n
2022-04-30 21:14:34.597  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : inserted: id<\/span> =<\/span> 1, first_name =<\/span> \u3082\u3082\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 9\r\n2022-04-30 21:14:34.598  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : inserted: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\n2022-04-30 21:14:34.598  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : inserted: id<\/span> =<\/span> 3, first_name =<\/span> \u305f\u307e\u3048, last_name =<\/span> \u7a42\u6ce2, age =<\/span> 9\r\n2022-04-30 21:14:34.605  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : find all: id<\/span> =<\/span> 1, first_name =<\/span> \u3082\u3082\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 9\r\n2022-04-30 21:14:34.606  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : find all: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\n2022-04-30 21:14:34.606  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : find all: id<\/span> =<\/span> 3, first_name =<\/span> \u305f\u307e\u3048, last_name =<\/span> \u7a42\u6ce2, age =<\/span> 9\r\n2022-04-30 21:14:34.608  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : find by last_name: id<\/span> =<\/span> 1, first_name =<\/span> \u3082\u3082\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 9\r\n2022-04-30 21:14:34.608  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : find by last_name: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\n2022-04-30 21:14:34.610  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : find by object: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\n2022-04-30 21:14:34.612  INFO 30274 ---<\/span> [<\/span>           main] com.example.spring.mybatis.Runner        : find by primitives: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\n<\/code><\/pre>\n
\u5728\u6267\u884cINSERT\u8bed\u53e5\u540e\uff0c\u901a\u8fc7\u5e8f\u5217\uff08serial\uff09\u751f\u6210\u7684ID\u5df2\u88ab\u5e94\u7528\u4e8e\u6a21\u578b\u4e2d\u3002<\/p>\n
inserted: id<\/span> =<\/span> 1, first_name =<\/span> \u3082\u3082\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 9\r\ninserted: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\ninserted: id<\/span> =<\/span> 3, first_name =<\/span> \u305f\u307e\u3048, last_name =<\/span> \u7a42\u6ce2, age =<\/span> 9\r\n<\/code><\/pre>\n
\u9009\u62e9\u6587\u4e5f\u53ef\u4ee5\u7684\u561b\u3002<\/p>\n
find all: id<\/span> =<\/span> 1, first_name =<\/span> \u3082\u3082\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 9\r\nfind all: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\nfind all: id<\/span> =<\/span> 3, first_name =<\/span> \u305f\u307e\u3048, last_name =<\/span> \u7a42\u6ce2, age =<\/span> 9\r\n\r\n\r\nfind by last_name: id<\/span> =<\/span> 1, first_name =<\/span> \u3082\u3082\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 9\r\nfind by last_name: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\n\r\n\r\nfind by object: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\n\r\nfind by primitives: id<\/span> =<\/span> 2, first_name =<\/span> \u3055\u304d\u3053, last_name =<\/span> \u3055\u304f\u3089, age =<\/span> 11\r\n<\/code><\/pre>\n
\u8fd9\u6b21\u5e94\u8be5\u5c31\u662f\u8fd9\u6837\u4e86\u5427\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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