spring3.0以后支持自带的任务计划spring task,具体配置分为注解和xml两种方式，注解使用@Scheduled，同时需要在xml中配置<task:annotation-driven/>，具体如下：
<task:scheduler id="scheduler" pool-size="4" />
<task:annotation-driven scheduler="scheduler" />
这里重点说一下xml配置
<?xml version="1.0" encoding="UTF-8,2685561208,2499486051"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd"
<task:scheduler id="scheduler" pool-size="2" /><!--一般小于等于task:scheduled数，但不能过小-->
<task:scheduled-tasks scheduler="scheduler">
<task:scheduled ref="synDataFromPortalTask" method="synOrgData" cron="0 0 2 * * ?"/>
<task:scheduled ref="msgSendTask" method="sendMsg" cron="0 0/3 8-18 * * ?"/>
</task:scheduled-tasks>
</beans>