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

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：

< 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

<!-- 注解扫描包 -->
< context:component-scan  base-package="com.ljq.web.controller.annotation" />
<!-- Enables the Spring Task @Scheduled programming model -->
< 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

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