spring boot 学习记录-第一个程序

Posted 2021-03-13 yanjiemao

一、新建maven工程

 

 

 

 

 

 二、项目构建

1.添加依赖

        

2.编写启动类

    App.java

 1 package org.yanjiemao;
 2 
 3 import org.springframework.boot.SpringApplication;
 4 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 5 import org.springframework.context.annotation.ComponentScan;
 6 
 7 @EnableAutoConfiguration  //开启自动化配置，自动进行Spring 和 Spring MVC 的配置
 8 @ComponentScan
 9 
10 public class App {
11     public static void main (String [] args) {
12         SpringApplication.run(App.class,args);
13     }
14 
15 
16 
17 }

   创建控制器

 HelloController.java

 1 package org.yanjiemao;
 2 
 3 
 4 import org.springframework.web.bind.annotation.GetMapping;
 5 import org.springframework.web.bind.annotation.RestController;
 6 
 7 @RestController
 8 public class HelloController {
 9 
10     @GetMapping("/hello")
11     public String hello() {
12         return "hello yanjiemao!";
13     }
14 }

3.项目启动

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