spring 定时器功能

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1.spring配置文件实现定时器功能

<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="myTaskXml" class="com.spring.task.MyTaskXml"></bean>        <task:scheduled-tasks>          <!--              这里表示的是每隔五秒执行一次          -->          <task:scheduled ref="myTaskXml" method="show" cron="*/5 * * * * ?" />          <task:scheduled ref="myTaskXml" method="print" cron="*/10 * * * * ?"/>      </task:scheduled-tasks>            <!-- 自动扫描的包名 -->        <context:component-scan base-package="com.spring.task" />        </beans>

xml定时器执行任务

package com.spring.task;    /**  * 基于xml的定时器  * @author hj  */  public class MyTaskXml {                  public void show(){          System.out.println("XMl:is show run");      }            public void print(){          System.out.println("XMl:print run");      }  }

2.spring注解实现定时器功能

package com.spring.task;    import org.springframework.scheduling.annotation.Scheduled;  import org.springframework.stereotype.Component;    /**  * 基于注解的定时器  * @author hj  */  @Component  public class MyTaskAnnotation {            /**       * 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("Annotation：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("Annotation：print run");      }  }

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