第一个springboot例子

项目结构 

HelloController.java

package com.fengqing.qqspringboot.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping("/sayHello")
    public String sayHello() {
        return "hello springboot";
    }
}

启动项目，打开浏览器访问http://localhost:8080/sayHello，出现