{"id":40141,"date":"2022-12-01T06:05:36","date_gmt":"2023-11-24T19:06:51","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8kotlin%e5%92%8cspring-boot%e6%9e%84%e5%bb%ba%e4%b8%80%e4%b8%aa%e6%9c%80%e7%ae%80%e5%8d%95%e7%9a%84web-api\/"},"modified":"2024-04-29T03:14:37","modified_gmt":"2024-04-28T19:14:37","slug":"%e4%bd%bf%e7%94%a8kotlin%e5%92%8cspring-boot%e6%9e%84%e5%bb%ba%e4%b8%80%e4%b8%aa%e6%9c%80%e7%ae%80%e5%8d%95%e7%9a%84web-api","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8kotlin%e5%92%8cspring-boot%e6%9e%84%e5%bb%ba%e4%b8%80%e4%b8%aa%e6%9c%80%e7%ae%80%e5%8d%95%e7%9a%84web-api\/","title":{"rendered":"\u4f7f\u7528Kotlin\u548cSpring Boot\u6784\u5efa\u4e00\u4e2a\u6700\u7b80\u5355\u7684Web API"},"content":{"rendered":"<h2>\u7b80\u800c\u8a00\u4e4b<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Kotlin + SpringBoot\u3092\u6271\u3063\u3066\u307f\u307e\u3057\u305f\u306e\u3067\u3001\u74b0\u5883\u69cb\u7bc9\u30e1\u30e2\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Spring Data JPA\u3067\u30c6\u30fc\u30d6\u30eb\u30a2\u30af\u30bb\u30b9\u3057\u3001JSON\u5f62\u5f0f\u3067\u30d6\u30e9\u30a6\u30b6\u306b\u8fd4\u5374\u3059\u308b\u3068\u3053\u308d\u307e\u3067\u3092\u66f8\u3044\u3066\u304a\u308a\u307e\u3059\u3002<\/ul>\n<h2>\u521b\u5efaSpring\u9879\u76ee<\/h2>\n<p>Spring Initializr\u3092\u4f7f\u3044\u307e\u3059\u3002<br \/>\n\u8a2d\u5b9a\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d3ea637434c4406c8b90e\/4-0.png\" alt=\"image.png\" \/><\/div>\n<h2>\u4e0b\u8f7d IntelliJ IDEA<\/h2>\n<p>IntelliJ IDEA\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002<br \/>\nCommunity\u7248(\u7121\u6599)\u3067\u5927\u4e08\u592b\u3067\u3059\u3002<\/p>\n<h2>\u5bfc\u5165\u5df2\u521b\u5efa\u7684\u9879\u76ee<\/h2>\n<ul class=\"post-ul\">IntelliJ IDEA\u3088\u308a [File] -&gt; [Open&#8230;] \u3092\u9078\u629e\u3057\u3001\u4f5c\u6210\u3057\u305f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u308a\u8fbc\u307f\u307e\u3059\u3002<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d3ea637434c4406c8b90e\/9-0.png\" alt=\"image.png\" \/><\/div>\n<h2>\u5c06JPA\u6ce8\u91ca\u6389<\/h2>\n<pre class=\"post-pre\"><code><span class=\"nf\">dependencies<\/span> <span class=\"p\">{<\/span>\r\n<span class=\"c1\">\/\/  implementation(\"org.springframework.boot:spring-boot-starter-data-jpa\")<\/span>\r\n    <span class=\"nf\">implementation<\/span><span class=\"p\">(<\/span><span class=\"s\">\"org.springframework.boot:spring-boot-starter-web\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nf\">implementation<\/span><span class=\"p\">(<\/span><span class=\"s\">\"com.fasterxml.jackson.module:jackson-module-kotlin\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nf\">implementation<\/span><span class=\"p\">(<\/span><span class=\"s\">\"org.jetbrains.kotlin:kotlin-reflect\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nf\">implementation<\/span><span class=\"p\">(<\/span><span class=\"s\">\"org.jetbrains.kotlin:kotlin-stdlib-jdk8\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nf\">compileOnly<\/span><span class=\"p\">(<\/span><span class=\"s\">\"org.projectlombok:lombok\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nf\">annotationProcessor<\/span><span class=\"p\">(<\/span><span class=\"s\">\"org.projectlombok:lombok\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nf\">testImplementation<\/span><span class=\"p\">(<\/span><span class=\"s\">\"org.springframework.boot:spring-boot-starter-test\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u5199\u4e00\u4e2a\u63a7\u5236\u5668<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Controller\u30af\u30e9\u30b9\u3092\u66f8\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4e8b\u524d\u306bcontroller\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f5c\u6210\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"nn\">com.example.demo.controller<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.http.MediaType<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.http.ResponseEntity<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.web.bind.annotation.GetMapping<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.web.bind.annotation.RequestMapping<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.web.bind.annotation.RestController<\/span>\r\n\r\n<span class=\"nd\">@RestController<\/span>\r\n<span class=\"nd\">@RequestMapping<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\/demo\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">DemoController<\/span> <span class=\"p\">{<\/span>\r\n\r\n    <span class=\"nd\">@GetMapping<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\/getAll\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">fun<\/span> <span class=\"nf\">getAll<\/span><span class=\"p\">():<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"p\">&lt;<\/span><span class=\"nc\">String<\/span><span class=\"p\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"p\">.<\/span><span class=\"nf\">ok<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Demo\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u542f\u52a8\u9879\u76ee<\/h2>\n<ul class=\"post-ul\">[View] -&gt; [Tool Windows] -&gt; [Gradle] -&gt; [Tasks] -&gt; [application] -&gt; [bootRun] \u3092\u9078\u629e\u3057\u3066\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d3ea637434c4406c8b90e\/17-0.png\" alt=\"image.png\" \/><\/div>\n<ul class=\"post-ul\">\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30ed\u30b0\u304c\u51fa\u308c\u3070OK\u3067\u3059\u3002<\/ul>\n<pre class=\"post-pre\"><code>18:32:18: Executing task 'bootRun'...\r\n\r\n&gt; Task :compileKotlin\r\n&gt; Task :compileJava NO-SOURCE\r\n&gt; Task :processResources UP-TO-DATE\r\n&gt; Task :classes UP-TO-DATE\r\n&gt; Task :bootRunMainClassName\r\n\r\n&gt; Task :bootRun\r\n\r\n  .   ____          _            __ _ _\r\n \/\\\\ \/ ___'_ __ _ _(_)_ __  __ _ \\ \\ \\ \\\r\n( ( )\\___ | '_ | '_| | '_ \\\/ _` | \\ \\ \\ \\\r\n \\\\\/  ___)| |_)| | | | | || (_| |  ) ) ) )\r\n  '  |____| .__|_| |_|_| |_\\__, | \/ \/ \/ \/\r\n =========|_|==============|___\/=\/_\/_\/_\/\r\n :: Spring Boot ::                (v2.4.3)\r\n\r\n2021-03-13 18:32:21.905  INFO 8184 --- [           main] com.example.demo.DemoApplicationKt       : Starting DemoApplicationKt using Java 1.8.0_241 on DESKTOP-I88K5MF with PID 8184 \r\n2021-03-13 18:32:21.905  INFO 8184 --- [           main] com.example.demo.DemoApplicationKt       : No active profile set, falling back to default profiles: default\r\n2021-03-13 18:32:23.034  INFO 8184 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)\r\n2021-03-13 18:32:23.050  INFO 8184 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]\r\n2021-03-13 18:32:23.050  INFO 8184 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat\/9.0.43]\r\n2021-03-13 18:32:23.128  INFO 8184 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[\/]       : Initializing Spring embedded WebApplicationContext\r\n2021-03-13 18:32:23.128  INFO 8184 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1155 ms\r\n2021-03-13 18:32:23.425  INFO 8184 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'\r\n2021-03-13 18:32:23.662  INFO 8184 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''\r\n2021-03-13 18:32:23.677  INFO 8184 --- [           main] com.example.demo.DemoApplicationKt       : Started DemoApplicationKt in 2.308 seconds (JVM running for 2.822)\r\n2021-03-13 18:32:26.108  INFO 8184 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[\/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'\r\n2021-03-13 18:32:26.108  INFO 8184 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'\r\n2021-03-13 18:32:26.116  INFO 8184 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 8 ms\r\n\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u30d6\u30e9\u30a6\u30b6\u3067http:\/\/localhost:8080\/demo\/getAll\u3092\u8868\u793a\u3059\u308b \u2192 Demo\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/ul>\n<h2>\u4e3a\u4e86\u4f7f\u7528JPA\u8fdb\u884c\u6570\u636e\u8bbf\u95ee\uff0c\u9700\u8981\u51c6\u5907Mysql\u6570\u636e\u5e93\u3002<\/h2>\n<ul class=\"post-ul\">\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u3063\u3066\u304a\u304d\u307e\u3059\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">create<\/span> <span class=\"k\">database<\/span> <span class=\"n\">demo<\/span><span class=\"p\">;<\/span>\r\n<span class=\"n\">use<\/span> <span class=\"n\">demo<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">create<\/span> <span class=\"k\">table<\/span> <span class=\"n\">demo<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"n\">id<\/span> <span class=\"nb\">int<\/span> <span class=\"n\">auto_increment<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">name<\/span> <span class=\"nb\">varchar<\/span><span class=\"p\">(<\/span><span class=\"mi\">256<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"k\">PRIMARY<\/span> <span class=\"k\">KEY<\/span> <span class=\"p\">(<\/span><span class=\"n\">id<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">);<\/span>\r\n<span class=\"k\">insert<\/span> <span class=\"k\">into<\/span> <span class=\"n\">demo<\/span> <span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">)<\/span> <span class=\"k\">values<\/span> <span class=\"p\">(<\/span><span class=\"nv\">\"test\"<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h2>\u5728application.properties\u4e2d\u6dfb\u52a0\u914d\u7f6e\u3002<\/h2>\n<pre class=\"post-pre\"><code><span class=\"py\">spring.datasource.url<\/span><span class=\"p\">=<\/span><span class=\"s\">jdbc:mysql:\/\/localhost:3306\/demo?useUnicode=true&amp;useJDBCCompliantTimezoneShift=true&amp;useLegacyDatetimeCode=false&amp;serverTimezone=UTC<\/span>\r\n<span class=\"py\">spring.datasource.username<\/span><span class=\"p\">=<\/span><span class=\"s\">root<\/span>\r\n<span class=\"py\">spring.datasource.password<\/span><span class=\"p\">=<\/span><span class=\"s\">root<\/span>\r\n<span class=\"py\">spring.datasource.driverClassName<\/span><span class=\"p\">=<\/span><span class=\"s\">com.mysql.jdbc.Driver<\/span>\r\n<span class=\"py\">spring.jpa.database<\/span><span class=\"p\">=<\/span><span class=\"s\">MYSQL<\/span>\r\n<span class=\"py\">spring.jpa.hibernate.ddl-auto<\/span><span class=\"p\">=<\/span><span class=\"s\">update<\/span>\r\n<\/code><\/pre>\n<p>\u53c2\u8003\uff1a<br \/>\n\u5c1d\u8bd5\u4f7f\u7528Java\u8fde\u63a5\u6570\u636e\u5e93\uff08MySQL\uff09\u65f6\u51fa\u73b0\u9519\u8bef\u7684\u89e3\u51b3\u65b9\u6848<br \/>\n\u4f7f\u7528SpringBoot + Spring JPA\u4e0e\u6570\u636e\u5e93\u8fdb\u884c\u8fde\u63a5<\/p>\n<h2>\u53d6\u6d88JPA\u7684\u6ce8\u91ca\uff0c\u5e76\u6dfb\u52a0\u9a71\u52a8\u7a0b\u5e8f\u3002<\/h2>\n<pre class=\"post-pre\"><code>\r\ndependencies {\r\n<span class=\"gi\">+   implementation(\"org.springframework.boot:spring-boot-starter-data-jpa\")\r\n<\/span>    implementation(\"org.springframework.boot:spring-boot-starter-web\")\r\n    implementation(\"com.fasterxml.jackson.module:jackson-module-kotlin\")\r\n    implementation(\"org.jetbrains.kotlin:kotlin-reflect\")\r\n    implementation(\"org.jetbrains.kotlin:kotlin-stdlib-jdk8\")\r\n<span class=\"gi\">+   implementation(\"mysql:mysql-connector-java:8.0.20\")\r\n<\/span>    compileOnly(\"org.projectlombok:lombok\")\r\n    annotationProcessor(\"org.projectlombok:lombok\")\r\n    testImplementation(\"org.springframework.boot:spring-boot-starter-test\")\r\n<span class=\"err\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u521b\u5efa\u5b9e\u4f53<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4e8b\u524d\u306bentity\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f5c\u6210\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Demo.kt\u3092\u66f8\u304d\u307e\u3059\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"nn\">com.example.demo.entity<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"nn\">javax.persistence.Entity<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">javax.persistence.GeneratedValue<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">javax.persistence.Id<\/span>\r\n\r\n<span class=\"nd\">@Entity<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Demo<\/span> <span class=\"p\">(<\/span>\r\n        <span class=\"kd\">var<\/span> <span class=\"py\">name<\/span><span class=\"p\">:<\/span> <span class=\"nc\">String<\/span><span class=\"p\">?<\/span> <span class=\"p\">=<\/span> <span class=\"k\">null<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nd\">@Id<\/span>\r\n        <span class=\"nd\">@GeneratedValue<\/span>\r\n        <span class=\"kd\">var<\/span> <span class=\"py\">id<\/span><span class=\"p\">:<\/span> <span class=\"nc\">Long<\/span><span class=\"p\">?<\/span> <span class=\"p\">=<\/span> <span class=\"k\">null<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<h2>\u521b\u5efa\u4ee3\u7801\u5e93<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4e8b\u524d\u306brepository\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f5c\u6210\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">DemoRepository.kt\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"nn\">com.example.demo.repository<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"nn\">com.example.demo.entity.Demo<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.data.repository.CrudRepository<\/span>\r\n\r\n<span class=\"kd\">interface<\/span> <span class=\"nc\">DemoRepository<\/span> <span class=\"p\">:<\/span> <span class=\"nc\">CrudRepository<\/span><span class=\"p\">&lt;<\/span><span class=\"nc\">Demo<\/span><span class=\"p\">,<\/span> <span class=\"nc\">Long<\/span><span class=\"p\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fun<\/span> <span class=\"nf\">findAllByOrderById<\/span><span class=\"p\">():<\/span> <span class=\"nc\">Iterable<\/span><span class=\"p\">&lt;<\/span><span class=\"nc\">Demo<\/span><span class=\"p\">&gt;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u4fee\u6539\u63a7\u5236\u5668<\/h2>\n<pre class=\"post-pre\"><code>\r\n<span class=\"k\">package<\/span> <span class=\"nn\">com.example.demo.controller<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"nn\">com.example.demo.entity.Demo<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">com.example.demo.repository.DemoRepository<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.beans.factory.annotation.Autowired<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.http.MediaType<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.http.ResponseEntity<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.web.bind.annotation.GetMapping<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.web.bind.annotation.RequestMapping<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nn\">org.springframework.web.bind.annotation.RestController<\/span>\r\n\r\n<span class=\"nd\">@RestController<\/span>\r\n<span class=\"nd\">@RequestMapping<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\/demo\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">DemoController<\/span> <span class=\"nd\">@Autowired<\/span> <span class=\"k\">constructor<\/span><span class=\"p\">(<\/span>  <span class=\"c1\">\/\/\u4fee\u6b63<\/span>\r\n        <span class=\"kd\">val<\/span> <span class=\"py\">demoRepository<\/span><span class=\"p\">:<\/span> <span class=\"nc\">DemoRepository<\/span><span class=\"p\">)<\/span>   <span class=\"c1\">\/\/\u4fee\u6b63<\/span>\r\n<span class=\"p\">{<\/span>                                             <span class=\"c1\">\/\/\u4fee\u6b63   <\/span>\r\n\r\n    <span class=\"nd\">@GetMapping<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\/getAll\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">fun<\/span> <span class=\"nf\">getAll<\/span><span class=\"p\">():<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"p\">&lt;<\/span><span class=\"nc\">Iterable<\/span><span class=\"p\">&lt;<\/span><span class=\"nc\">Demo<\/span><span class=\"p\">&gt;&gt;<\/span> <span class=\"p\">{<\/span>             <span class=\"c1\">\/\/\u4fee\u6b63<\/span>\r\n        <span class=\"kd\">val<\/span> <span class=\"py\">demos<\/span> <span class=\"p\">=<\/span> <span class=\"n\">demoRepository<\/span><span class=\"p\">.<\/span><span class=\"nf\">findAllByOrderById<\/span><span class=\"p\">()<\/span>        <span class=\"c1\">\/\/\u4fee\u6b63  <\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"p\">.<\/span><span class=\"nf\">ok<\/span><span class=\"p\">(<\/span><span class=\"n\">demos<\/span><span class=\"p\">)<\/span>                        <span class=\"c1\">\/\/\u4fee\u6b63 <\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u7528\u6d4f\u89c8\u5668\u8fdb\u884c\u663e\u793a<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d6\u30e9\u30a6\u30b6\u3067http:\/\/localhost:8080\/demo\/getAll\u3092\u8868\u793a\u3057\u307e\u3059<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4e0b\u8a18\u306e\u3088\u3046\u306bDB\u306b\u767b\u9332\u3055\u308c\u305f\u30c7\u30fc\u30bf\u304c\u8fd4\u5374\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d3ea637434c4406c8b90e\/39-0.png\" alt=\"image.png\" \/><\/div>\n<h2>\u603b\u7ed3<\/h2>\n<ul class=\"post-ul\">kotlin + Spring Boot\u3067JSON\u3092Get\u3059\u308b\u3068\u3053\u308d\u307e\u3067\u3084\u308a\u307e\u3057\u305f\u3002\u4f55\u304b\u306e\u53c2\u8003\u306b\u306a\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/ul>\n<p>\u53c2\u8003\u6587\u732e\uff1a<br \/>\n\u4f7f\u7528Spring Data JPA\u5165\u95e8<br \/>\n\u4f7f\u7528Kotlin\u548cSpring Boot 2.0\u5b9e\u73b0\u7b80\u5355\u7684Rest API<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u800c\u8a00\u4e4b Kotlin + SpringBoot\u3092\u6271\u3063\u3066\u307f\u307e\u3057\u305f\u306e\u3067\u3001\u74b0\u5883\u69cb\u7bc9\u30e1\u30e2\u3067\u3059\u3002 &nbsp; Spr [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-40141","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>\u4f7f\u7528Kotlin\u548cSpring Boot\u6784\u5efa\u4e00\u4e2a\u6700\u7b80\u5355\u7684Web API - 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\/\u4f7f\u7528kotlin\u548cspring-boot\u6784\u5efa\u4e00\u4e2a\u6700\u7b80\u5355\u7684web-api\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" 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