spring4 定时任务

一、spring 定时任务

spring 定时任务 ,最好使用quartz 实现。下面我以spring4为例

二、实战（默认）

1、pom配置

                <!-- spring time task -->
        <dependency>
            <groupId>org.quartz-scheduler</groupId>
            <artifactId>quartz</artifactId>
            <version>1.8.4</version>
        </dependency>        

2、bean 配置

<?xml version="1.0" encoding="gb2312"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"
    default-autowire="byName">
    
    <bean name="myTaskJob" class="org.springframework.scheduling.quartz.JobDetailBean">  
        <property name="jobClass" value="com.yuanmeng.spring.TaskDemo" />  
        <property name="jobDataAsMap">  
            <map>  
            <entry key="timeout" value="36000" />  
            </map>  
        </property>  
    </bean>  
    
    <bean id="myTaskTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">  
        <property name="jobDetail" ref="myTaskJob" />  
        <property name="startDelay" value="3000" />
        <property name="repeatInterval" value="60000" /><!-- 每600秒调度一次 -->  
    </bean>  

    <!--启动任务-->
    <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">  
        <property name="triggers">  
            <list>  
                <ref bean="myTaskTrigger" />  
            </list>  
        </property>  
    </bean>  
    
</beans> 

3、定时java类, 继承 QuartzJobBean

package com.yuanmeng.spring;

import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.scheduling.quartz.QuartzJobBean;

public class TaskDemo extends QuartzJobBean {
    
    private static int i = 0;

    @Override
    protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
        
        
        
        System.out.println("--------- begin ---------");
        
        System.out.println(" i = " + i++);
        
        
        System.out.println("--------- end ---------");
    }

    
}

4、启动

package com.yuanmeng.spring;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.scheduling.quartz.JobDetailBean;

public class Client {

    public static void main(String[] args) {

        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:spring/spring-timetask.xml");

        org.springframework.scheduling.quartz.JobDetailBean bean = (JobDetailBean) ac.getBean("myTaskJob");
        
        System.out.println(bean != null);

    }
}

5、看下结果

--------- begin ---------
 i = 0
--------- end ---------
--------- begin ---------
 i = 1
--------- end ---------
--------- begin ---------
 i = 2
--------- end ---------
--------- begin ---------
 i = 3
--------- end ---------
--------- begin ---------
 i = 4
--------- end ---------
--------- begin ---------
 i = 5
--------- end ---------
--------- begin ---------
 i = 6
--------- end ---------
--------- begin ---------
 i = 7
--------- end ---------
--------- begin ---------
 i = 8
--------- end ---------
--------- begin ---------
 i = 9
--------- end ---------
--------- begin ---------
 i = 10
--------- end ---------
--------- begin ---------
 i = 11
--------- end ---------
--------- begin ---------
 i = 12
--------- end ---------

三、实战（不继承）

1、bean 配置

    <bean id="myTask" class="com.yuanmeng.spring.TaskDemo2" />

    <bean id="jobDetail"
        class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <!-- 指定定时任务执行类 -->
        <property name="targetObject" ref="myTask" />
        <!-- 指定定时任务执行方法 -->
        <property name="targetMethod" value="doIt" />
        <property name="concurrent" value="false" />
    </bean>

    <bean id="simpleTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">
        
        <property name="jobDetail" ref="jobDetail" />
        
        <property name="startDelay" value="5000" />
        
        <property name="repeatInterval" value="3000" />
    </bean>

    <!-- 总调度用于启动Spring定时器 -->
    <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="simpleTrigger" />
            </list>
        </property>
    </bean>

2、自定义任务类

package com.yuanmeng.spring;

public class TaskDemo2 {

    private static int i = 0;

    public void doIt() {

        System.out.println("---------doIt begin ---------");

        System.out.println(" i = " + i++);

        System.out.println("---------doIt end ---------");
    }

}

3、启动

ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:spring/spring-timetask2.xml");

4、结果

---------doIt begin ---------
 i = 0
---------doIt end ---------
---------doIt begin ---------
 i = 1
---------doIt end ---------
---------doIt begin ---------
 i = 2
---------doIt end ---------
---------doIt begin ---------
 i = 3
---------doIt end ---------
---------doIt begin ---------
 i = 4
---------doIt end ---------
---------doIt begin ---------