spring执行定时任务之一<示例>

spring执行定时任务

定义一个任务是很简单的实现TimerTask的run方法就可以了. 
如下:SayHelloTask.java 

 1package test.timerTask;
 2
 3import java.util.TimerTask;
 4
 5public class Task extends TimerTask {
 6
 7  @Override
 8  public void run() {
 9    // TODO Auto-generated method stub
10    System.out.println("测试TimerTask : Hello !!");
11  }
12
13}

 1package test.springTimer;
 2
 3import java.util.TimerTask;
 4
 5public class Task2 extends TimerTask{
 6    public void run(){
 7        
 8        System.out.println("task2 is running");
 9    }
10
11    
12}
13

然后是配置文件: 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>
<bean id="sayHelloTask" class="test.springTimer.Task"></bean>
<bean id="HelloTask" class="test.springTimer.Task2"></bean>

<bean id="scheduledTask" class="org.springframework.scheduling.timer.ScheduledTimerTask">
<property name="timerTask">
<ref bean="sayHelloTask"/>
</property>
<!-- 任务执行周期 2m 关于一些任务的参数请参考JDK doc文档和Spring相关文档-->
<property name="period">
<value>2000</value>
</property>
<!-- 延时1m 执行任务 -->
<property name="delay">
<value>1000</value>
</property>
</bean>

<bean id="scheduledTask2" class="org.springframework.scheduling.timer.ScheduledTimerTask">
<property name="timerTask">
<ref bean="HelloTask"/>
</property>
<!-- 任务执行周期 2m 关于一些任务的参数请参考JDK doc文档和Spring相关文档-->
<property name="period">
<value>2000</value>
</property>
<!-- 延时1m 执行任务 -->
<property name="delay">
<value>1000</value>
</property>
</bean>

<!-- 启动定时器 -->
<bean id="timerBean" class="org.springframework.scheduling.timer.TimerFactoryBean">
<property name="scheduledTimerTasks">
<list>
<ref bean="scheduledTask"/>
<ref bean="scheduledTask2"/>
</list>
</property>
</bean>
</beans>

测试类如下:TestApp.java

package test.timerTask;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestApp {

  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    ApplicationContext context = new ClassPathXmlApplicationContext("test/timerTask/javaTimer.xml");
 //   ApplicationContext context2 = new ClassPathXmlApplicationContext("test/timerTask/quartzTimer.xml");
  }
// 只要加载配置文件就可以了,
} 

运行结果：
task2 is running
task2 is running
haha,task is running
haha,task is running
task2 is running
使用Java中的定时器比较简单,其提供的任务也比较简单, 下面来看看使用quartz来执行一个复杂的任务. 

 1package test.timerTask;
 2
 3import org.quartz.JobExecutionContext;
 4import org.quartz.JobExecutionException;
 5import org.springframework.scheduling.quartz.QuartzJobBean;
 6
 7public class SayHelloTaskUsingQuartz extends QuartzJobBean {
 8
 9  @Override
10  protected void executeInternal(JobExecutionContext context)
11      throws JobExecutionException {
12    // TODO Auto-generated method stub
13    System.out.println("使用Quartz 认为调度: Hello!!");
14  }
15
16} 
17

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<bean id="sayHelloJob" class="org.springframework.scheduling.quartz.JobDetailBean">
<property name="jobClass">
<value>test.timerTask.SayHelloTaskUsingQuartz</value>
</property>
</bean> 

<!-- 关键在如下两个触发器的配置 --> 

<!-- 类似于Java的简单触发器 --> 

<bean id="helloTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">
<property name="jobDetail">
<ref bean="sayHelloJob"/>
</property>
<property name="startDelay">
<value>1000</value>
</property>
<property name="repeatInterval">
<value>3000</value>
</property>
</bean> 
    
<!-- 复杂触发器 --> 

<bean id="helloCronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
<property name="jobDetail">
<ref bean="sayHelloJob"/>
</property>
<property name="cronExpression"> 
  
<!-- 关键在配置此表达式 --> 

<value>0 49 15 * *  </value>
</property>
</bean>
<bean id="scheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<ref bean="helloCronTrigger"/>
</property>
</bean>

   </beans>