spring定时任务轮询(spring Task)

spring定时任务轮询(spring Task)

定时任务轮询比如任务自服务器启动就开始运行,并且每隔5秒执行一次。

以下用spring注解配置定时任务。
1、添加相应的schema

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xmlns:task="
xsi:schemaLocation="
     http://www.springframework.org/schema/task
     http://www.springframework.org/schema/task/spring-task-3.0.xsd"

  

完整schema如下:

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< beans  xmlns="http://www.springframework.org/schema/beans"
     xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
     xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:task="http://www.springframework.org/schema/task"
     xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context.xsd 
       http://www.springframework.org/schema/mvc 
       http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
       http://www.springframework.org/schema/task         
       http://www.springframework.org/schema/task/spring-task-3.0.xsd">
beans >

  

2、配置自动调度的包和定时开关

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< context:component-scan  base-package="com.ljq.web.controller.annotation" />
< task:executor  id="executor" pool-size="5" />
< task:scheduler  id="scheduler" pool-size="10" />
< task:annotation-driven  executor="executor" scheduler="scheduler" />

  

3、添加调度测试类

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package  com.ljq.web.controller.annotation;
 
import  org.springframework.scheduling.annotation.Scheduled;
import  org.springframework.stereotype.Service;
 
/**
  * 调度测试类(每隔5秒执行一次)
  *
  * @author Administrator
  *
  */
@Service
public  class  TaskTest {
     @Scheduled (cron =  "0/5 * * * * ? " )
     public  void  myTestWork() {
         System.out.println(System.currentTimeMillis());
     }
}

  

备注:cron = "0/5 * * * * ? "从左到右依次是:秒、分、小时、日、月、周、年

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