这几天想写一个动态添加任务项目找了找Spring下的自带定时功能发现还真有,然后网上找了找资料写了个demo
写了两种方式来执行定时的任务(XML配置和注解)
先建两个普通的任务类(XML配置调用的任务类)
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package com.ebbbe.task;
/** * 基于配置xml的定时器
* @author Lese
*/
public class TaskTest {
public void show(){
System.out.println( "XML配置:is show run" );
}
public void print(){
System.out.println( "XML配置:is print run" );
}
} |
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package com.ebbbe.task;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
/** * 基于注解的定时器
* @author Lese
*/
@Component public class TestTaskAnnotation {
/**
* 定时计算。每天凌晨 01:00 执行一次
*/ @Scheduled (cron = "0 0 1 * * *" )
public void show(){
System.out.println( "注解:is show run" );
}
/**
* 心跳更新。启动时执行一次,之后每隔2秒执行一次
*/ @Scheduled (fixedRate = 1000 * 2 )
public void print(){
System.out.println( "注解:is print run" );
}
} |
在写一个测试的Main方法
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package com.ebbbe.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/** * @author Lese
*/
public class Main {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext( "spring-mvc.xml" );
}
} |
spring-mvc.XML
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< beans xmlns = "http://www.springframework.org/schema/beans"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns:p = "http://www.springframework.org/schema/p"
xmlns:task = "http://www.springframework.org/schema/task"
xmlns:context = "http://www.springframework.org/schema/context"
xmlns:aop = "http://www.springframework.org/schema/aop" 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/jee http://www.springframework.org/schema/jee/spring-jee-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/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">
< task:annotation-driven /> <!-- 定时器开关 --> < bean id = "TaskTest" class = "com.ebbbe.task.TaskTest" ></ bean >
< task:scheduled-tasks >
<!-- 这里表示的是从第五秒开始 ,每三秒执行一次 (而不是 三分之五 秒执行一次哦~~) -->
< task:scheduled ref = "TaskTest" method = "show" cron = "*/5 * * * * ?" />
< task:scheduled ref = "TaskTest" method = "print" cron = "*/10 * * * * ?" />
</ task:scheduled-tasks >
<!-- 自动扫描的包名 --> < context:component-scan base-package = "com.ebbbe.task" />
</ beans >
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