JAVA springboot实现hello world

1.编写HelloController类（接口）

1.创建包:com.xbb.springboot.tutorial.web
2.在上面的包下面创建一个java类:HelloController，内容如下:

package com.xbb.springboot.tutorial.web;

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 world";
    }
    
}