Spring与Quartz集成实现定时调度任务的简单使用

在前面一篇文章中，简单的讲解了一下Quartz的基本用法，这篇文章继续上篇文章未完成的任务，Spring与Quartz集成。

主要涉及的知识点有Spring，Quartz，ServletContextListener

举一个最最最简单的入门例子：

一、maven引入相关依赖

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>

<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>2.2.1</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>

二、Spring配置文件

<?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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd"> 
<!-- 引入定时任务工厂类 -->
<bean id="schedulerFactoryBean" class="org.springframework.scheduling.quartz.SchedulerFactoryBean"></bean>

</beans>

三、在web.xml配置文件中初始化Spring

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="2.5"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name>core_paltform</display-name>

<!--初始化spring-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<listener>
<listener-class>com.jr.test.ProjectInit</listener-class>
</listener>
</web-app>

四、定义任务类

@Component("TestJob")
public class TestJob implements Job{
@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
System.out.println("嗯嘛，么么哒…");
}
}

五、定义一个类实现ServletContextListenner方法

同时记得在web.xml中配置该类

public class ProjectInit implements ServletContextListener {

private static WebApplicationContext context;

private Scheduler scheduler;

public void contextInitialized(ServletContextEvent servletContextEvent) {
/**
* 获取上下文
*/
context = WebApplicationContextUtils.getWebApplicationContext(servletContextEvent.getServletContext());
scheduler = context.getBean("schedulerFactoryBean", Scheduler.class);
try {
JobDetail jobDetail = JobBuilder.newJob(TestJob.class).withIdentity("TestJob", "TestJob").build();
//表达式调度构建器
CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(" 0 0/1 * * * ?"); //一分钟执行一次
CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity("TestJob", "TestJob").withSchedule(scheduleBuilder).build();
scheduler.scheduleJob(jobDetail, trigger);
} catch (SchedulerException e) {
e.printStackTrace();
}
}

public void contextDestroyed(ServletContextEvent servletContextEvent) {

}
}

上面的例子利用Spring的定时任务工厂类与Quartz实现定时任务的最基本用户，后续将继续研究更高级的使用。