用idea写一个springboot的小demo(手动添加依赖)

1 创建一个maven项目

2.添加pom.xml的依赖

   
    
        org.springframework.boot
        spring-boot-starter-parent
        1.5.9.RELEASE
    

    

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

3.编写一个springboot启动类

package com.yt;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @SpringBootApplication 来标注一个主程序类,说明这是一个springboot应用
 */
@SpringBootApplication
public class HelloWorldApplication {

    public static void main(String[] args) {

        //spring应用启动起来
        SpringApplication.run(HelloWorldApplication.class,args);

    }

}

4.编写一个controller

package com.yt.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class HelloController {

    @ResponseBody
    @RequestMapping("/hello")
    public String hello(){
         return "hello yt";
    }

}

5.run 运行启动类

6.测试:http://localhost:8080/hello