Spring任务调度器之Task的使用
转:http://kennylee26.iteye.com/blog/1965291
Spring Task提供两种方式进行配置,正如大家所想吧,还是一种是annotation(标注),而另外一种就是XML配置了。但其实这里我觉得比较尴尬,因为任务调度这样的需求,通常改动都是比较多的,如果用annotation的方式的话,改动就变得麻烦了,必须去重新编译。所以,我只是选择用XML配置的方式,不过我还是习惯性地启用着标注方式,就如AOP配置那样。annotation方式请自行查找@Scheduled
具体配置参考如下即可
- <?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"
- 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.xsd
- http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">
- <bean id="reminderProcessor" class="com.foo.task.ReminderProcessor">
- <property name="workers">
- <array value-type="com.foo.task.Worker">
- <ref bean="projectScheduleRemindWorker" />
- </array>
- </property>
- </bean>
- <!-- 配置任务线性池 -->
- <task:executor id="executor" pool-size="3" />
- <task:scheduler id="scheduler" pool-size="3" />
- <!-- 启用annotation方式 -->
- <task:annotation-driven scheduler="scheduler"
- executor="executor" proxy-target-class="true" />
- <task:scheduled-tasks scheduler="scheduler">
- <task:scheduled ref="reminderProcessor" method="process"
- cron="0 0 12 * * ?" />
- </task:scheduled-tasks>
- </beans>
核心部分见
- <task:scheduled-tasks scheduler="scheduler">
- <task:scheduled ref="reminderProcessor" method="process"
- cron="0 0 12 * * ?" />
- </task:scheduled-tasks>
意思就是每天的12点执行reminderProcessor这个Bean中的process方法。cron的配置表达式跟Quartz基本一致,但实测不支持一些特殊字符,如配置天的时候的L,W和Z,因为遇到要每个月倒数第三天执行任务调度的需求,但我一配置SpringTask报非法字符。
所以,Quartz和SpringTask间的差距也显而易见的。SpringTask用起来十分简单,毕竟是Spring自家的,虽然跟Quartz也可以实现结合,但没那么简单。而SpringTask功能也没Quartz强大,Quartz的集群和高级特性多的去了。所以大家可以自行选择了。不过一般情况下,觉得SpringTask足够了。
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop" 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/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd"> <context:annotation-config /> <!-- Spring自动扫描包 --> <context:component-scan base-package="com.test.schedule" /> <!-- 计划任务 --> <task:executor id="executor" pool-size="5" /> <task:scheduler id="scheduler" pool-size="10" /> <task:annotation-driven executor="executor" scheduler="scheduler" /> </beans>
@Component public class JobDemo { @Scheduled(cron = "1 * * * * ?") public void execute() { System.out.println("JobDemo")); long ms = System.currentTimeMillis(); System.out.println(ms); } }