Spring定时器实现(二)

Spring结合quarzt可以实现更复杂的定时器，现做简单介绍相关配置：

<?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-4.3.xsd
        http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task-4.3.xsd ">

    <description>spring-configuration</description>

    <bean id="timerTask" class="com.charles.spring.service.impl.TimerTaskImpl"></bean>
    
    <bean id="timerDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <property name="targetObject" ref="timerTask"></property>
        <property name="targetMethod" value="doTimerTask"></property>
    </bean>

    <bean id="simpleTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerFactoryBean">
        <property name="jobDetail" ref="timerDetail" />
        <property name="startDelay" value="10000" />
        <property name="repeatInterval" value="3000" />
    </bean>

    <bean id="startTimer" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="simpleTrigger" />
            </list>
        </property>
    </bean>

</beans>

由于结合quartz的原因，需要相关quartz的Jar包，可到官网下载：http://www.quartz-scheduler.org/

接口与其实现类与Spring定时器实现(一)相同

package com.charles.spring.service.impl;

import com.charles.spring.service.TimerTask;

public class TimerTaskImpl implements TimerTask {

    @Override
    public void doTimerTask() throws Exception {
        System.out.println("Hello Timer");
    }

}

测试类：

package com.charles.spring.handler;

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

public class Timer {

    public static void main(String[] args) {
        
        @SuppressWarnings({ "unused", "resource" })
        ApplicationContext context = new ClassPathXmlApplicationContext("config/spring-config.xml");
        try {
            Thread.sleep(10*60*1000);
        } catch (Exception e) {
            
        }

    }

}

以上算是Spring定时器第二种实现方式了，不过、目前还有另一种配置，如下：

<?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-4.3.xsd
        http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task-4.3.xsd ">

    <description>spring-configuration</description>

    <bean id="timerTask" class="com.charles.spring.service.impl.TimerTaskImpl"></bean>
    
    <bean id="timerDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <property name="targetObject" ref="timerTask"></property>
        <property name="targetMethod" value="doTimerTask"></property>
    </bean>

    <bean id="cronTigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
        <property name="jobDetail" ref="timerDetail"></property>
        <property name="cronExpression">
            <value>0/2 * * * * ?</value>
        </property>
    </bean>

    <bean id="startTimer" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="cronTigger" />
            </list>
        </property>
    </bean>

</beans>

此时、将原先配置文件中的

<bean id="simpleTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerFactoryBean">
    <property name="jobDetail" ref="timerDetail" />
    <property name="startDelay" value="10000" />
    <property name="repeatInterval" value="3000" />
</bean>
修改为：
<bean id="cronTigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
    <property name="jobDetail" ref="timerDetail"></property>
    <property name="cronExpression">
        <value>0/2 * * * * ?</value>
    </property>
</bean>  

即可。