Spring Boot实战笔记（七）-- Spring高级话题（计划任务）

package com.ecworking.schedule;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.text.SimpleDateFormat;
import java.util.Date;

@Service
public class SchduledTaskService {
    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");

    @Scheduled(fixedRate = 5000) // 通过@Scheduled声明该方法是计划任务，使用fixedRate属性每隔固定时间执行
    public void reportCurrentTime(){
        System.out.println("每隔五秒执行一次：" + dateFormat.format(new Date()));
    }

    @Scheduled(cron = "0 30 11 ? * *") // 使用cron属性可按指定时间执行计划任务，此处是11.30执行；cron是UNIX和类UNIX系统下的定时任务
    public void fixTimeExecution(){
        System.out.println("在指定时间执行：" + dateFormat.format(new Date()));
    }
}

package com.ecworking.schedule;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;

@Configuration
@ComponentScan("com.ecworking.schedule")
@EnableScheduling // 通过@EnableScheduling开启对计划任务的支持
public class SchduledTaskConfig {
}

package com.ecworking.schedule;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Main {
    public static void main(String[] args){
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(SchduledTaskConfig.class);
    }
}