Getting Started Guides(0)：First Spring Boot Application

• 新建项目rest-service
• 配置POM文件
• 添加依赖
• Hello World
• 生成jar包
• 参考

Intellij IDEA ，新建项目Maven空项目，目录如下：

    4.0.0

    com.springtest
    rest-service
    1.0-SNAPSHOT
    
    rest-service Maven Webapp
    
    http://www.example.com

    
        org.springframework.boot
        spring-boot-starter-parent
        2.6.1
    
	
	
	
>

    
        org.springframework.boot
        spring-boot-starter-web
    

等待依赖包下载完毕。项目新建完成

@RestController
@EnableAutoConfiguration
public class MyApplication {
    
    @RequestMapping("/")
    String home() {
        return "Hello world!";
    }

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}

运行 'Run MyApplication' ，打开网页，输入地址：localhost:8080，返回：

Hello world!

生产环境部署、运行还是需要jar包的

    
        
            org.springframework.boot
            spring-boot-maven-plugin
        
    

运行 'mvn package'，命令行打印，jar包会出现在项目下的target文件夹

…
[INFO] — maven-jar-plugin:3.2.0:jar (default-jar) @ rest-service —
[INFO] Building jar: /Users/guxianxiong/springtest/rest-service/target/rest-service-1.0-SNAPSHOT.jar
[INFO]
[INFO] — spring-boot-maven-plugin:2.6.1:repackage (repackage) @ rest-service —
[INFO] Replacing main artifact with repackaged archive
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.026 s
[INFO] Finished at: 2021-12-07T15:18:08+08:00
[INFO] ------------------------------------------------------------------------

项目目录下，运行项目

$ java -jar target/rest-service-1.0-SNAPSHOT.jar
# ctrl + c 结束应用

1. Developing Your First Spring Boot Application