Java框架spring Boot学习笔记（一）：开始第一个项目

新建一个项目，选择Spring initializr

修改group和项目名

添加依赖包Web,MongoDB

设置保存位置和工程名

新建一个test的文件

输入代码：

package com.xxx.test.spider;

import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.util.Date;

import static java.lang.Thread.*;

//如果一个类带了@Service注解，将自动注册到Spring容器
@Service
public class test {
    //启动spring时运行这个方法
    @PostConstruct
    public void fun(){
        while (true){
            try {
                Thread.sleep(1000); //每隔1秒
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(new Date()); //打印当前时间
        }
    }
}

运行输出：

  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )\___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.8.RELEASE)

2017-10-30 15:33:23.583  INFO 8108 --- [           main] com.xxx.test.TestApplication             : Starting TestApplication on CXYF-100-049 with PID 8108 (D:IdeaProjectsx	est	argetclasses started by jacky.jiang in D:IdeaProjectsx	est)
2017-10-30 15:33:23.585  INFO 8108 --- [           main] com.xxx.test.TestApplication             : No active profile set, falling back to default profiles: default
2017-10-30 15:33:23.621  INFO 8108 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@6dde5c8c: startup date [Mon Oct 30 15:33:23 CST 2017]; root of context hierarchy
Mon Oct 30 15:33:24 CST 2017
Mon Oct 30 15:33:25 CST 2017
Mon Oct 30 15:33:26 CST 2017