Spring Boot教程11——计划任务

package com.wisely.highlight_spring4.ch3.taskscheduler;

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

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

@Service
public class ScheduledTaskService {
    
      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5秒执行一次 " + dateFormat.format(new Date()));
       }

      @Scheduled(cron = "0 28 11 ? * *"  ) //使用cron属性可按指定时间执行，本例指的是11点28分执行；cron是UNIX和类UNIX（如Linux）系统下的定时任务
      public void fixTimeExecution(){
          System.out.println("在指定时间 " + dateFormat.format(new Date())+"?执行");
      }

}

package com.wisely.highlight_spring4.ch3.taskscheduler;

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

@Configuration
@ComponentScan("com.wisely.highlight_spring4.ch3.taskscheduler")
@EnableScheduling //开启对计划任务的支持
public class TaskSchedulerConfig {

}

package com.wisely.highlight_spring4.ch3.taskscheduler;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

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

}