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一 准备工作
1 建立Maven项目工程
2 引入Quartz jar包
<dependencies>
<!-- https://mvnrepository.com/artifact/org.quartz-scheduler/quartz -->
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
二 项目简介
编写Quartz任务,让任务每两秒打印一次helloworld。
1 编写HelloJob
package com.quartz;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class HelloJob implements Job{
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
//打印当前执行的时间
Date date = new Date();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("Current Exec Time is:" + simpleDateFormat.format(date));
//编写具体的业务逻辑
System.out.println("Hello World!");
}
}
2 编写HelloScheduler
package com.quartz;
import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import java.text.SimpleDateFormat;
import java.util.Date;
public class HelloScheduler {
public static void main(String[] args) throws SchedulerException {
//创建一个JobDetail实例, 将该实例与hellojob class 绑定
JobDetail jobDetail = JobBuilder.newJob(HelloJob.class).withIdentity("myJob","group1").build();
//创建一个Trigger实例,定义该job立即执行,并且每隔两秒钟重复执行一次
Trigger trigger = TriggerBuilder.newTrigger().withIdentity("myTrigger","group1")
.startNow().withSchedule(
SimpleScheduleBuilder.simpleSchedule()
.withIntervalInSeconds(2).repeatForever()
).build();
//创建Schedule实例
SchedulerFactory schedulerFactory = new StdSchedulerFactory();
Scheduler scheduler = schedulerFactory.getScheduler();
scheduler.start();
Date date = new Date();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("Current Time is:" + simpleDateFormat.format(date));
scheduler.scheduleJob(jobDetail,trigger);
}
}
三 测试
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Current Time is:2018-11-15 21:49:14
Current Exec Time is:2018-11-15 21:49:14
Hello World!
Current Exec Time is:2018-11-15 21:49:16
Hello World!
Current Exec Time is:2018-11-15 21:49:18
Hello World!
Current Exec Time is:2018-11-15 21:49:20
Hello World!