applicationContext-schedule.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	   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-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">

	<task:annotation-driven scheduler="schedule" executor="executor"/>
	<!-- 在執行定時任務時最多啟用五個執行緒 -->
	<task:scheduler id="schedule" pool-size="5"/>
	<!-- 與@Async配合使用，會在排程執行緒呼叫該任務時啟用一個執行緒池，執行緒最大數為5，最小數為2，快取任務為200，多於200的拒絕策略為丟棄 -->
	<task:executor id="executor" pool-size="5" keep-alive="2" queue-capacity="200" rejection-policy="ABORT"/>
	<context:annotation-config />
	<context:component-scan base-package="****"/>
</beans>
 

applicationContext-root.xml中引入applicationContext-schedule.xml：

<import resource="classpath:applicationContext-schedule.xml" />

web.xml的配置：

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext-root.xml</param-value>
  </context-param>
 

java類中的寫法：

   @Scheduled(cron = "0 0 0/5 * * ？")
    void syncCaseStatus() {
        System.out.println("================定時器=============");
    }

總結：1.java類所在的包要跟applicationContext-schedule.xml中配置的掃描包對應。 2.spring中schedule預設是單執行緒的，要開啟多執行緒需要加上applicationContext-schedule.xml中的配置 3.注意scheduler 和executor 配置間的差別。