用quartz实现自动任务执行_quartz怎样设置启动自动查看已有任务并执行-优快云博客

本文介绍如何使用Quartz实现定时任务执行。通过具体步骤指导如何配置环境、编写定时任务代码及配置文件，最终实现每10分钟执行一次的任务。

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用quartz实现自动任务执行

需求：系统里有一任务，需要定时执行

有一开源项目可以解决此类问题，拿来

1.       下载   到google里搜索 quartz down之

2.       加开发包quartz.jar到你的环境，至于怎么配置不多讲，自己动手。

3.       在web.xml里加入

    <servlet>

       <servlet-name>QuartzInitializer</servlet-name>

       <servlet-class>

           org.quartz.ee.servlet.QuartzInitializerServlet

       </servlet-class>

       <load-on-startup>1</load-on-startup>

    </servlet>

4.    编写要定时实行的代码。

小例子，你可以写的无比复杂根据你的需求

  package test.job;

import org.quartz.Job;

import org.quartz.JobExecutionContext;

import org.quartz.JobExecutionException;

public class Myjob implements Job

{

    public void execute(JobExecutionContext context)

       throws JobExecutionException

    {

             System.out.println(“*********执行了定时任务操作*********”);

}

}

5．编写quartz_reminder.xml

<?xml version="1.0" encoding="UTF-8"?>

<quartz xmlns="http://www.opensymphony.com/quartz/JobSchedulingData"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.opensymphony.com/quartz/JobSchedulingData

http://www.opensymphony.com/quartz/xml/job_scheduling_data_1_5.xsd"

version="1.5">

<job>

    <job-detail>

      <name>Job_myjob</name>

      <group>DEFAULT</group>

      <job-class>com.job.Myjob</job-class>

    </job-detail>

    <trigger>

      <cron>

        <name>Trigger_job</name>

        <group>DEFAULT</group>

        <job-name>Job_myjob</job-name>

        <job-group>DEFAULT</job-group>

        <cron-expression>0 0/10 * * * ?</cron-expression>

      </cron>

</trigger>

</job>

</quartz>

设置每10分钟执行一次，其他设置，请搜索其写法，呵呵

6．编写quartz.properties

#

# Configure Main Scheduler Properties

#

org.quartz.scheduler.instanceName = TestScheduler

org.quartz.scheduler.instanceId = one

#

# Configure ThreadPool

#

org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool

org.quartz.threadPool.threadCount = 5

org.quartz.threadPool.threadPriority = 4

#

# Configure JobStore

#

org.quartz.jobStore.misfireThreshold = 5000

org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore

# ===========================================================================

# Configure SchedulerPlugins ===============================================

# ===========================================================================

org.quartz.plugin.triggHistory.class = org.quartz.plugins.history.LoggingTriggerHistoryPlugin

org.quartz.plugin.triggHistory.triggerFiredMessage = Trigger{1}.{0}firedjob{6}.{5}at: {4,date,HH:mm:ssMM/dd/yyyy}

org.quartz.plugin.triggHistory.triggerCompleteMessage = Trigger{1}.{0}completedfiringjob{6}.{5}at{4,date,HH:mm:ssMM/dd/yyyy}withresultingtriggerinstructioncode:{9}

org.quartz.plugin.jobInitializer.class = org.quartz.plugins.xml.JobInitializationPlugin

org.quartz.plugin.jobInitializer.fileName =/quartz_reminder.xml

org.quartz.plugin.jobInitializer.overWriteExistingJobs = false

org.quartz.plugin.jobInitializer.failOnFileNotFound = true

org.quartz.plugin.shutdownhook.class = org.quartz.plugins.management.ShutdownHookPlugin

org.quartz.plugin.shutdownhook.cleanShutdown = true

7.把quartz_reminder.xml和quartz.properties放到WEB-INF/classes下

8．OK，启动你的应用服务器，一会查看执行结果。。。

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