关于spring boot的问题

按照了spring boot官网上的helloworld例子,但是编译出现java.lang.NoClassDefFoundError: com/he/OfficialDemo,package com.he;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**

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  • @author pzr
    *
    */
    @Controller
    @EnableAutoConfiguration
    public class OfficialDemo {
    @RequestMapping("/test")
    @ResponseBody
    String home() {
    System.out.println("OfficialDemo.home()");
    return "Hello World!";
    }

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

我的代码`


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