Spring4.0.6 +Quartz 2.2.1动态添加、修改、删除、关闭定时任务
说在前面：
Spring Quartz动态添加、修改、删除、关闭定时任务， 无非就是将
《Spring task quartz 示例 一文中的Spring quartz示例 和 《Quartz 2.2 动态添加、修改和删除定时任务》QuartzManager.java进行整合。
相对Spring Task的动态添加、修改、删除、关闭定时任务简单了许多。
下面我们进入正题。
需要引入 spring-context-support-4.0.6.RELEASE.jar
**注意版本兼容问题：
Spring+Quartz的版本兼容问题**
代码示例
MyJob.java
import java.util.Date;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
public class MyJob implements Job{
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
System.out.println(new Date() + ": job 1 doing something...");
}
}MyJob2.java
import java.util.Date;
public class MyJob{
public void doSomething(){
System.out.println(new Date() + ": job 2 doing something...");
}
}
spring-mvc.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
default-lazy-init="true">
<bean id="myJob2" class="quartz.MyJob2">bean>
<bean id="jobtask" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject" ref="myJob2" />
<property name="targetMethod" value="doSomething" />
<property name ="concurrent" value ="false" />
bean>
<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean ">
<property name="jobDetail" ref="jobtask" />
<property name="cronExpression" value="0/1 * * * * ?" />
bean>
<bean id="startQuertz" lazy-init="true" autowire="no" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="cronTrigger" />
list>
property>
bean>
<bean id="quartzManager" class="quartz.QuartzManager" lazy-init="false" init-method="startJobs" >
<property name="scheduler" ref="startQuertz" />
bean>
beans> QuartzManager.java
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
public class QuartzManager {
private Scheduler scheduler;
/**
* @Description: 添加一个定时任务
*
* @param jobName 任务名
* @param jobGroupName 任务组名
* @param triggerName 触发器名
* @param triggerGroupName 触发器组名
* @param jobClass 任务
* @param cron 时间设置，参考quartz说明文档
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public void addJob(String jobName, String jobGroupName,
String triggerName, String triggerGroupName, Class jobClass, String cron) {
try {
// 任务名，任务组，任务执行类
JobDetail jobDetail= JobBuilder.newJob(jobClass).withIdentity(jobName, jobGroupName).build();
// 触发器
TriggerBuilder triggerBuilder = TriggerBuilder.newTrigger();
// 触发器名,触发器组
triggerBuilder.withIdentity(triggerName, triggerGroupName);
triggerBuilder.startNow();
// 触发器时间设定
triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron));
// 创建Trigger对象
CronTrigger trigger = (CronTrigger) triggerBuilder.build();
// 调度容器设置JobDetail和Trigger
scheduler.scheduleJob(jobDetail, trigger);
// 启动
if (!scheduler.isShutdown()) {
scheduler.start();
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description: 修改一个任务的触发时间
*
* @param jobName
* @param jobGroupName
* @param triggerName 触发器名
* @param triggerGroupName 触发器组名
* @param cron 时间设置，参考quartz说明文档
*/
public void modifyJobTime(String jobName,
String jobGroupName, String triggerName, String triggerGroupName, String cron) {
try {
TriggerKey triggerKey = TriggerKey.triggerKey(triggerName, triggerGroupName);
CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);
if (trigger == null) {
return;
}
String oldTime = trigger.getCronExpression();
if (!oldTime.equalsIgnoreCase(cron)) {
/** 方式一 ：调用 rescheduleJob 开始 */
// 触发器
TriggerBuilder triggerBuilder = TriggerBuilder.newTrigger();
// 触发器名,触发器组
triggerBuilder.withIdentity(triggerName, triggerGroupName);
triggerBuilder.startNow();
// 触发器时间设定
triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron));
// 创建Trigger对象
trigger = (CronTrigger) triggerBuilder.build();
// 方式一 ：修改一个任务的触发时间
scheduler.rescheduleJob(triggerKey, trigger);
/** 方式一 ：调用 rescheduleJob 结束 */
/** 方式二：先删除，然后在创建一个新的Job */
//JobDetail jobDetail = scheduler.getJobDetail(JobKey.jobKey(jobName, jobGroupName));
//Class jobClass = jobDetail.getJobClass();
//removeJob(jobName, jobGroupName, triggerName, triggerGroupName);
//addJob(jobName, jobGroupName, triggerName, triggerGroupName, jobClass, cron);
/** 方式二 ：先删除，然后在创建一个新的Job */
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description: 移除一个任务
*
* @param jobName
* @param jobGroupName
* @param triggerName
* @param triggerGroupName
*/
public void removeJob(String jobName, String jobGroupName,
String triggerName, String triggerGroupName) {
try {
TriggerKey triggerKey = TriggerKey.triggerKey(triggerName, triggerGroupName);
scheduler.pauseTrigger(triggerKey);// 停止触发器
scheduler.unscheduleJob(triggerKey);// 移除触发器
scheduler.deleteJob(JobKey.jobKey(jobName, jobGroupName));// 删除任务
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description:启动所有定时任务
*/
public void startJobs() {
try {
scheduler.start();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description:关闭所有定时任务
*/
public void shutdownJobs() {
try {
if (!scheduler.isShutdown()) {
scheduler.shutdown();
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public Scheduler getScheduler() {
return scheduler;
}
public void setScheduler(Scheduler scheduler) {
this.scheduler = scheduler;
}
}
测试类1：Test.java
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test{
public static void main(String[] args) throws BeansException {
ApplicationContext ctx = new ClassPathXmlApplicationContext("spring-mvc.xml");
QuartzManager quartzManager = (QuartzManager) ctx.getBean("quartzManager");
try {
System.out.println("【系统启动】开始(每1秒输出一次)...");
} catch (Exception e) {
e.printStackTrace();
}
}
}执行结果：
测试类2：Test.java
public static void main(String[] args) throws BeansException {
ApplicationContext ctx = new ClassPathXmlApplicationContext("spring-mvc.xml");
QuartzManager quartzManager = (QuartzManager) ctx.getBean("quartzManager");
try {
System.out.println("【系统启动】开始(每1秒输出一次 job2)...");
Thread.sleep(5000);
System.out.println("【增加job1启动】开始(每1秒输出一次)...");
quartzManager.addJob("test", "test", "test", "test", MyJob.class, "0/1 * * * * ?");
Thread.sleep(5000);
System.out.println("【修改job1时间】开始(每2秒输出一次)...");
quartzManager.modifyJobTime("test", "test", "test", "test", "0/2 * * * * ?");
Thread.sleep(10000);
System.out.println("【移除job1定时】开始...");
quartzManager.removeJob("test", "test", "test", "test");
// 关掉任务调度容器
// quartzManager.shutdownJobs();
} catch (Exception e) {
e.printStackTrace();
}
}执行结果：
因此我们只要在测试的方法中， 将cron的表达式改成从数据库中查出来，然后设置进去，然后接着再封装一个action， 改变数据库的cron值，调用action请求就可以实现 Spring Quartz动态添加、修改、删除、关闭定时任务。