Content Table
2017-09-05

Spring Boot Start

Spring Boot 创建入门级 RESTful Web 项目简单到令人发指，下面就来看看怎么用吧(如果想知道 Spring Boot 是啥，搜索即可):

  1. 创建项目的骨架
  2. 添加 RestController
  3. 启动项目: gradle bootRun
  4. 打包项目: gradle build

创建项目的骨架

  1. 访问 http://start.spring.io
  2. 选择 Gradle 项目，Spring Boot 2.x
  3. 填写 Group (项目的包名，例如 com.xtuer) 和 Artifact (可不填)
  4. Search for dependencies 输入 web
  5. 点击 Generate Project，会自动下载项目骨架 demo.zip
  6. 解压，如果不需要里面的 gradlew，删除即可

添加 RestController

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package com.xtuer;

import org.springframework.web.bind.annotation.*;

@RestController
public class XController {
    @GetMapping("/hello")
    public String hello() {
        return "Hello";
    }
}

启动项目

终端进入项目目录，执行 gradle bootRun，输出日志可以看到项目启动成功，然后浏览器访问 http://localhost:8080/hello，得到响应的字符串 Hello，完成.

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> Task :bootRun

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.3.RELEASE)

2019-03-11 21:33:22.834  INFO 86793 --- [           main] com.xtuer.Application                    : Starting Application on Biao.local with PID 86793 (/Users/Biao/Desktop/demo/build/classes/java/main started by Biao in /Users/Biao/Desktop/demo)
2019-03-11 21:33:22.838  INFO 86793 --- [           main] com.xtuer.Application                    : No active profile set, falling back to default profiles: default
2019-03-11 21:33:23.795  INFO 86793 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2019-03-11 21:33:23.830  INFO 86793 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-03-11 21:33:23.830  INFO 86793 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.16]
2019-03-11 21:33:23.842  INFO 86793 --- [           main] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/Users/Biao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.]
2019-03-11 21:33:23.933  INFO 86793 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-03-11 21:33:23.933  INFO 86793 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1060 ms
2019-03-11 21:33:24.186  INFO 86793 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-03-11 21:33:24.379  INFO 86793 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2019-03-11 21:33:24.382  INFO 86793 --- [           main] com.xtuer.Application                    : Started Application in 16.859 seconds (JVM running for 17.217)
2019-03-11 21:33:34.036  INFO 86793 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2019-03-11 21:33:34.037  INFO 86793 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2019-03-11 21:33:34.043  INFO 86793 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 6 ms
<=========----> 75% EXECUTING [39s]

打包项目

终端进入项目目录，执行 gradle build，在 <project>/build/libs 中得到 jar 包，可以使用 java -jar xxx.jar 执行.