1. Introduction to the use of QuartzJobBean:

Timer functions are often used in project development, such as batching in the evening, processing accounts regularly, etc. jdk also provides Timer to implement timer tasks, a brief introduction to Timer implementation.The use of Timer is roughly divided into two steps:

First, write a task class that inherits TimerTask and overrides the run method

package com.erayt.timer;
import java.util.TimerTask;
 
 
public class MTimerTask extends TimerTask{
 
	private String name;
	public MTimerTask(String nicKname){
		this.name = nicKname;
	}
	@Override
	public void run() {
		// TODO Auto-generated method stub
		System.out.println("Current name:"+name);
		
	}
 
}

Second, create Timer objects, set tasks and schedule strategies

package com.erayt.timer;
import java.util.Timer;
 
 
public class MyTimer extends Timer{
	public static void main(String[] args) {
		Timer timer = new Timer();//Create Timer Object
		MTimerTask task = new MTimerTask("Hello");
		timer.schedule(task, 2000, 1000);//Parameters: Set the task, which is triggered at intervals after startup, and how often after triggering
	}
}

This article does not focus on the use of Timer. The most common way to integrate spring with Quartz in a project is to use QuartzJobBean.There are three key objects:

1. Scheduling work class: org.springframework.scheduling.quartz.JobDetailBean, which specifies the scheduling work class through the jobClass attribute;

2. Schedule trigger: org.springframework.scheduling.quartz.CronTriggerBean, which specifies the work class through the jobDetail property, and

The cronExpression property specifies the dispatch frequency;

3. Scheduling factory class: org.springframework.scheduling.quartz.SchedulerFactoryBean, which specifies one or more triggers through the triggers property.

Below is the implementation of a simple test for the project.

2. Required jar packages (version not fixed):

pring-2.5.6.jar, commons-logging-1.1.jar, quartz-all-1.6.5.jar, commons-collections-3.2.jar (without this package, startup tests will fail

Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.SetUtils).

3. Create a java project and import jar packages

4. Writing work classes (simple implementation)

package com.erayt.job;
 
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.scheduling.quartz.QuartzJobBean;
 
public class Job1 extends QuartzJobBean {
 
	private int timeout;//How often does the schedule start
	 private static int i = 0;
 
	//JobDetailBean injects this property value through jobDataAsMap, specifying how many seconds after the server starts calling the work class for the first time
	public void setTimeout(int timeout) {
		this.timeout = timeout;
	}
        //Tasks to Schedule
	protected void executeInternal(JobExecutionContext context)
			throws JobExecutionException {
		System.out.println("QuartzJobBean-Dispatch" + ++i + "Have in hand...");
	}
 
}

5. Configure the spring file (this is written in the root directory)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
	"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
	<!-- JobDetailBean 1,Work Class Configuration -->
	 <bean name="job1" class="org.springframework.scheduling.quartz.JobDetailBean">
		 <property name="jobClass" value="com.erayt.job.Job1" />
		 <property name="jobDataAsMap">
			 <map>
			 <entry key="timeout" value="10" /><!-- Job1 In timeout Property, schedule enabled after 10 seconds-->
			 </map>
		 </property>
	 </bean>
	 <!-- CronTriggerBean 2,Trigger Configuration-->
	 <bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
	 	<property name="jobDetail" ref="job1" /><!-- Work class in injection step 1 -->
		<!-- Schedule every second -->
		<property name="cronExpression" value="0/1 * * * * ?" />
	 </bean>
	<!-- SchedulerFactoryBean 3,Configure Scheduling Factory -->
	 <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
		 <property name="triggers">
			 <list>
			 	<ref bean="cronTrigger" /><!-- Trigger in Injection Step 2 -->
			 </list>
		 </property>
	 </bean>
</beans>

6. Write a scheduling test class (load the spring configuration file)

package com.erayt.test;
 
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class ScheduleTest {
 
	public static void main(String[] args) {
		ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
	}
}

7. The dispatch results are as follows:

QuartzJobBean-Schedule 1 is in progress...
QuartzJobBean-Schedule 2 is in progress...
QuartzJobBean-Schedule 3 is in progress...
QuartzJobBean-Schedule 4 is in progress...
QuartzJobBean-Schedule 5 is in progress...
QuartzJobBean-Schedule 6 is in progress...

8. Supplement some scheduling time allocation methods.

Specific time settings are available for reference
"0/10 * * * * *?" Triggered every 10 seconds
"0 0 12 * *?" Triggers every day at 12 noon
"0 1510?* *" Triggers every day at 10:15 a.m.
"0 1510 * *?" Triggers every day at 10:15 a.m.
"0 1510 * *?*" Triggers every day at 10:15 a.m.
"0 1510 * *? 2005" Triggered every morning at 10:15 a.m. in 2005
"0 * 14 * *?" Triggers every minute between 2 p.m. and 2:59 p.m. each day
"0/5 14 * *?" Triggers every 5 minutes between 2 p.m. and 2:55 p.m. each day
"0/5 14,18 * *?" Triggers every 5 minutes between 2 p.m. and 2:55 p.m. each day and between 6 p.m. and 6:55 p.m.
"0-5 14 * *?" Triggers every minute between 2 p.m. and 2:05 p.m. each day
"0 10,44 14? 3 WED" is triggered every March Wednesday at 2:10 p.m. and 2:44 p.m.
"0 1510?* MON-FRI" Triggers from Monday to Friday at 10:15 a.m.
"0 15 10 15 *?" Triggered at 10:15 a.m. on the 15th of each month
"0 15 10 L *?" Triggered at 10:15 on the last day of each month
"0 1510?* 6L" Triggers at 10:15 a.m. on the last Friday of the month
"0 1510?* 6L 2002-2005" Triggered at 10:15 a.m. on the last Friday of each month, 2002-2005
"0 1510?* 6#3" Triggers on the third Friday of the month at 10:15 a.m.
Execute every 5 seconds: */5 * * * * *?
Execute every 1 minute: 0 */1 * * *?
Execute once a day at 23:00:23 * *?
Run once a day at 1 am: 0 01 * *?
Run once a month at 1 AM on 1st: 0 01 1 *?
Execute at 23 o'clock on last day of month: 0 0 23 L *?
Once a week, at 1 a.m. on Sundays: 0.01? * L
Execute once at 26, 29, 33 points: 0 26, 29, 33 * *?
Every day at 0, 13, 18, 21 o'clock: 0 0, 13, 18, 21 * *?