spring对timer支持

java2借助于java.util.Timer和java.util.TimerTask，这样两个类能够为应用提供简单定时器功能。

而Quartz是Open Source社区努力的结果，它能够提供任务调度服务，任何J2SE和J2EE应用都能够使用它，借助于Quartz，开发者能够完成各种复杂的任务调度。

Spring集成了上述两种任务调度服务的支持。

下面对Quartz的使用进行介绍：

创建一个java类：

package com.openv.spring;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.scheduling.quartz.QuartzJobBean;

public class LogJobBean extends QuartzJobBean{
	
	protected static final Log log=LogFactory.getLog(LogJobBean.class);
	private int timeout;
	
	public void setTimeout(int timeout){
		log.info("setTimeout().........");
		this.timeout=timeout;
	}

	@Override
	protected void executeInternal(JobExecutionContext arg0)
			throws JobExecutionException {
		log.info("Creating LogJobBean().........");
		
	}
	
}

写入配置文件：

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

	<bean name="logJob" class="org.springframework.scheduling.quartz.JobDetailBean">
		<property name="jobClass">
			<value>com.openv.spring.LogJobBean</value>
		</property>
		<property name="jobDataAsMap">
			<map>
				<entry key="timeout">
					<value>10</value>
				</entry>
			</map>
		</property>
	</bean>
	
	<bean id="simpleTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">
		<property name="jobDetail">
			<ref bean="logJob"/>
		</property>
		<property name="startDelay">
			<value>5000</value>
		</property>
		<property name="repeatInterval">
			<value>2000</value>
		</property>
		<property name="repeatCount">
			<value>3</value>
		</property>
	</bean>
	
	<bean id="sfb" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
		<property name="triggers">
			<list>
				<ref local="simpleTrigger"/>
			</list>
		</property>
	</bean>

</beans>

使用测试类：

package com.openv.spring;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

/**
 * 
 * @author weiliuhong
 *
 */
public class Main {
	
	protected static Log log=LogFactory.getLog(Main.class);

	/**
	 * @param <Scheduler>
	 * @param args
	 */
	public static void main(String[] args) {

		Resource resource=new ClassPathResource("appcontext.xml");
		BeanFactory factory=new XmlBeanFactory(resource);
		Scheduler sfb=(Scheduler)factory.getBean("sfb");
		
		try{
			Thread.sleep(20000);
		}catch (InterruptedException e) {
			log.error(e.getMessage(),e);
		}
		
		try{
			sfb.shutdown();
		}catch(SchedulerException se){
			log.error(se.getMessage(),se);
		}
	}

}

这样就实现对timer的调用

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