java 動(dòng)態(tài)增加定時(shí)任務(wù)示例

更新時(shí)間：2017年03月03日 14:07:37 作者：張錫斌

本篇文章主要介紹了java 動(dòng)態(tài)增加定時(shí)任務(wù)示例，小編覺(jué)得挺不錯(cuò)的，現(xiàn)在分享給大家，也給大家做個(gè)參考。一起跟隨小編過(guò)來(lái)看看吧

整理文檔，java 動(dòng)態(tài)增加定時(shí)任務(wù)示例，直接上代碼。

import org.apache.tools.ant.util.DateUtils;
import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;

import java.util.Calendar;
import java.util.Date;


/**
 * @Description: 定時(shí)任務(wù)管理類
 * Created by zhangxb on 2017/2/10.
 */
public class QuartzManager {
  private static SchedulerFactory gSchedulerFactory = new StdSchedulerFactory();
  private static String JOB_GROUP_NAME = "EXTJWEB_JOBGROUP_NAME";
  private static String TRIGGER_GROUP_NAME = "EXTJWEB_TRIGGERGROUP_NAME";

  /**
   * @Description: 添加一個(gè)定時(shí)任務(wù)，使用默認(rèn)的任務(wù)組名，觸發(fā)器名，觸發(fā)器組名
   *
   * @param jobName
   *      任務(wù)名
   * @param cls
   *      任務(wù)
   * @param time
   *      時(shí)間設(shè)置，參考quartz說(shuō)明文檔
   *
   * @Title: QuartzManager.java
   */
  @SuppressWarnings("unchecked")
  public static void addJob(String jobName, Class cls, String time,Object params) {
    try {
      Scheduler sched = gSchedulerFactory.getScheduler();
      JobDetail jobDetail = new JobDetail(jobName, JOB_GROUP_NAME, cls);// 任務(wù)名，任務(wù)組，任務(wù)執(zhí)行類
      jobDetail.getJobDataMap().put("params", params);
      // 觸發(fā)器
      CronTrigger trigger = new CronTrigger(jobName, TRIGGER_GROUP_NAME);// 觸發(fā)器名,觸發(fā)器組
      trigger.setCronExpression(time);// 觸發(fā)器時(shí)間設(shè)定
      sched.scheduleJob(jobDetail, trigger);
      // 啟動(dòng)
      if (!sched.isShutdown()) {
        sched.start();
      }
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * @Description: 添加一個(gè)定時(shí)任務(wù)
   *
   * @param jobName
   *      任務(wù)名
   * @param jobGroupName
   *      任務(wù)組名
   * @param triggerName
   *      觸發(fā)器名
   * @param triggerGroupName
   *      觸發(fā)器組名
   * @param jobClass
   *      任務(wù)
   * @param time
   *      時(shí)間設(shè)置，參考quartz說(shuō)明文檔
   *
   */
  @SuppressWarnings("unchecked")
  public static void addJob(String jobName, String jobGroupName,
               String triggerName, String triggerGroupName, Class jobClass,
               String time,Object params) {
    try {
      Scheduler sched = gSchedulerFactory.getScheduler();
      JobDetail jobDetail = new JobDetail(jobName, jobGroupName, jobClass);// 任務(wù)名，任務(wù)組，任務(wù)執(zhí)行類
      jobDetail.getJobDataMap().put("params",params);
      // 觸發(fā)器
      CronTrigger trigger = new CronTrigger(triggerName, triggerGroupName);// 觸發(fā)器名,觸發(fā)器組
      trigger.setCronExpression(time);// 觸發(fā)器時(shí)間設(shè)定
      sched.scheduleJob(jobDetail, trigger);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * @Description: 修改一個(gè)任務(wù)的觸發(fā)時(shí)間(使用默認(rèn)的任務(wù)組名，觸發(fā)器名，觸發(fā)器組名)
   *
   * @param jobName
   * @param time
   *
   */
  @SuppressWarnings("unchecked")
  public static void modifyJobTime(String jobName, String time) {
    try {
      Scheduler sched = gSchedulerFactory.getScheduler();
      CronTrigger trigger = (CronTrigger) sched.getTrigger(jobName,TRIGGER_GROUP_NAME);
      if (trigger == null) {
        return;
      }
      String oldTime = trigger.getCronExpression();
      if (!oldTime.equalsIgnoreCase(time)) {
        JobDetail jobDetail = sched.getJobDetail(jobName,JOB_GROUP_NAME);
        Class objJobClass = jobDetail.getJobClass();
        removeJob(jobName);
        addJob(jobName, objJobClass, time ,jobDetail.getJobDataMap());
      }
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * @Description: 修改一個(gè)任務(wù)的觸發(fā)時(shí)間
   *
   */
  public static void modifyJobTime(String triggerName,
                   String triggerGroupName, String time) {
    try {
      Scheduler sched = gSchedulerFactory.getScheduler();
      CronTrigger trigger = (CronTrigger) sched.getTrigger(triggerName,triggerGroupName);
      if (trigger == null) {
        return;
      }
      String oldTime = trigger.getCronExpression();
      if (!oldTime.equalsIgnoreCase(time)) {
        CronTrigger ct = (CronTrigger) trigger;
        // 修改時(shí)間
        ct.setCronExpression(time);
        // 重啟觸發(fā)器
        sched.resumeTrigger(triggerName, triggerGroupName);
      }
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * @Description: 移除一個(gè)任務(wù)(使用默認(rèn)的任務(wù)組名，觸發(fā)器名，觸發(fā)器組名)
   *
   * @param jobName
   *
   */
  public static void removeJob(String jobName) {
    try {
      Scheduler sched = gSchedulerFactory.getScheduler();
      sched.pauseTrigger(jobName, TRIGGER_GROUP_NAME);// 停止觸發(fā)器
      sched.unscheduleJob(jobName, TRIGGER_GROUP_NAME);// 移除觸發(fā)器
      sched.deleteJob(jobName, JOB_GROUP_NAME);// 刪除任務(wù)
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * @Description: 移除一個(gè)任務(wù)
   *
   */
  public static void removeJob(String jobName, String jobGroupName,
                 String triggerName, String triggerGroupName) {
    try {
      Scheduler sched = gSchedulerFactory.getScheduler();
      sched.pauseTrigger(triggerName, triggerGroupName);// 停止觸發(fā)器
      sched.unscheduleJob(triggerName, triggerGroupName);// 移除觸發(fā)器
      sched.deleteJob(jobName, jobGroupName);// 刪除任務(wù)
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * @Description:啟動(dòng)所有定時(shí)任務(wù)
   */
  public static void startJobs() {
    try {
      Scheduler sched = gSchedulerFactory.getScheduler();
      sched.start();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * @Description:關(guān)閉所有定時(shí)任務(wù)
   *
   */
  public static void shutdownJobs() {
    try {
      Scheduler sched = gSchedulerFactory.getScheduler();
      if (!sched.isShutdown()) {
        sched.shutdown();
      }
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  public static String formatTime(Date date){
    //0/1 * * * * ?
    String time = DateUtils.format( date, "s m h d * ?");
    System.out.println(time);
    return time;
  }
}

測(cè)試類

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * @Description: 任務(wù)執(zhí)行類
 * Created by zhangxb on 2017/2/10.
 */
public class QuartzJob implements Job {
  @Override
  public void execute(JobExecutionContext context) throws JobExecutionException {
    Object params =  context.getJobDetail().getJobDataMap().get("params");
    System.out.println(params);
    System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())+ "★★★★★★★★★★★");
    System.out.println("【移除定時(shí)】開始...");
    QuartzManager.removeJob((String)params);
    System.out.println("【移除定時(shí)】成功");
  }
  public static void main(String[] args) {
    try {
      String job_name = "動(dòng)態(tài)任務(wù)調(diào)度";
      System.out.println("【系統(tǒng)啟動(dòng)】開始(每1秒輸出一次)...");
      Calendar cal = Calendar.getInstance();
      cal.add( Calendar.SECOND,10);
      QuartzManager.addJob(job_name, QuartzJob.class, QuartzManager.formatTime(cal.getTime()),job_name);
      Thread.sleep(11);
      cal.setTime( new Date());
      cal.add( Calendar.SECOND,10);
      QuartzManager.addJob(job_name+1, QuartzJob.class, QuartzManager.formatTime(cal.getTime()),job_name+1);
      Thread.sleep(11);
//      System.out.println("【修改時(shí)間】開始(每2秒輸出一次)...");
//      QuartzManager.modifyJobTime(job_name, "10/2 * * * * ?");
//      Thread.sleep(6000);
//      System.out.println("【移除定時(shí)】開始...");
//      QuartzManager.removeJob(job_name);
//      System.out.println("【移除定時(shí)】成功");
//
//      System.out.println("【再次添加定時(shí)任務(wù)】開始(每10秒輸出一次)...");
//      QuartzManager.addJob(job_name, QuartzJob.class, "*/10 * * * * ?");
//      Thread.sleep(60000);
//      System.out.println("【移除定時(shí)】開始...");
//      QuartzManager.removeJob(job_name);
//      System.out.println("【移除定時(shí)】成功");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

不過(guò)最后發(fā)現(xiàn)，還是沒(méi)法做動(dòng)態(tài)延遲。后面用延時(shí)mq實(shí)現(xiàn)的。

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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