Quartz（任务调度）- 入门学习

 

参照：http://blog.csdn.net/szwangdf/article/details/6158646

1.自定义定时任务管理类 QuartzManager

参照大神基础上
新增：1.添加job时传入参数JobDataMap

　　　2.json和JobDataMap的互相转换

import java.text.ParseException;
import java.util.Iterator;

import net.sf.json.JSONObject;

import org.quartz.CronTrigger;
import org.quartz.JobDataMap;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;


/**
 * 定时任务管理类 
 * @author peak
 *
 */
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";  

    
    /** 
     * 添加一个定时任务，使用默认的任务组名，触发器名，触发器组名 
     * 
     * @param jobName 
     *            任务名 
     * @param jobClass 
     *            任务 
     * @param time 
     *            时间设置，参考quartz说明文档 
     * @param jobDataMap 
     *            参数map
     * @throws SchedulerException 
     * @throws ParseException 
     */  
    public static void addJob(String jobName, String jobClass, String time,JobDataMap jobDataMap) {  
        try {  
            Scheduler sched = gSchedulerFactory.getScheduler();  
            JobDetail jobDetail = new JobDetail(jobName, JOB_GROUP_NAME, Class.forName(jobClass));// 任务名，任务组，任务执行类  
            if(jobDataMap!=null){
                jobDetail.setJobDataMap(jobDataMap);
            }
            // 触发器  
            CronTrigger trigger = new CronTrigger(jobName, TRIGGER_GROUP_NAME);// 触发器名,触发器组  
            trigger.setCronExpression(time);// 触发器时间设定  
            sched.scheduleJob(jobDetail, trigger);  
            // 启动  
            if (!sched.isShutdown()){  
                sched.start();  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * 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 time 
     *            时间设置，参考quartz说明文档 
     * @throws SchedulerException 
     * @throws ParseException 
     */  
    public static void addJob(String jobName, String jobGroupName,  
            String triggerName, String triggerGroupName, String jobClass, String time,JobDataMap jobDataMap){  
        try {  
            Scheduler sched = gSchedulerFactory.getScheduler();  
            JobDetail jobDetail = new JobDetail(jobName, jobGroupName, Class.forName(jobClass));// 任务名，任务组，任务执行类  
            if(jobDataMap!=null){
                jobDetail.setJobDataMap(jobDataMap);
            }
            // 触发器  
            CronTrigger trigger = new CronTrigger(triggerName, triggerGroupName);// 触发器名,触发器组  
            trigger.setCronExpression(time);// 触发器时间设定  
            sched.scheduleJob(jobDetail, trigger);  
        } catch (Exception e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * 修改一个任务的触发时间(使用默认的任务组名，触发器名，触发器组名) 
     * 
     * @param jobName 
     * @param time 
     */  
    public static void modifyJobTime(String jobName, String time,JobDataMap jobDataMap) {  
        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);  
                if(jobDataMap!=null){
                    jobDetail.setJobDataMap(jobDataMap);
                }
                Class objJobClass = jobDetail.getJobClass();  
                String jobClass = objJobClass.getName();  
                removeJob(jobName);  

                addJob(jobName, jobClass, time,jobDataMap);  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * 修改一个任务的触发时间 
     * 
     * @param triggerName 
     * @param triggerGroupName 
     * @param time 
     */  
    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;  
                // 修改时间  
                ct.setCronExpression(time);  
                // 重启触发器  
                sched.resumeTrigger(triggerName, triggerGroupName);  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * 移除一个任务(使用默认的任务组名，触发器名，触发器组名) 
     * 
     * @param jobName 
     */  
    public static void removeJob(String jobName) {  
        try {  
            Scheduler sched = gSchedulerFactory.getScheduler();  
            sched.pauseTrigger(jobName, TRIGGER_GROUP_NAME);// 停止触发器  
            sched.unscheduleJob(jobName, TRIGGER_GROUP_NAME);// 移除触发器  
            sched.deleteJob(jobName, JOB_GROUP_NAME);// 删除任务  
        } catch (Exception e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * 移除一个任务 
     * 
     * @param jobName 
     * @param jobGroupName 
     * @param triggerName 
     * @param triggerGroupName 
     */  
    public static void removeJob(String jobName, String jobGroupName,  
            String triggerName, String triggerGroupName) {  
        try {  
            Scheduler sched = gSchedulerFactory.getScheduler();  
            sched.pauseTrigger(triggerName, triggerGroupName);// 停止触发器  
            sched.unscheduleJob(triggerName, triggerGroupName);// 移除触发器  
            sched.deleteJob(jobName, jobGroupName);// 删除任务  
        } catch (Exception e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * 启动所有定时任务 
     */  
    public static void startJobs() {  
        try {  
            Scheduler sched = gSchedulerFactory.getScheduler();  
            sched.start();  
        } catch (Exception e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * 关闭所有定时任务 
     */  
    public static void shutdownJobs() {  
        try {  
            Scheduler sched = gSchedulerFactory.getScheduler();  
            if(!sched.isShutdown()) {  
                sched.shutdown();  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  
    
    
    /**
     * jobDataMap 转换为 json字符串
     * @param jobDataMap
     * @return
     */
    public static String jobDataMap2json(JobDataMap jobDataMap){
        String[] keys = jobDataMap.getKeys();
        JSONObject jsonObject = new JSONObject();
        for (int i = 0; i < keys.length; i++) {
            jsonObject.put(keys[i], jobDataMap.get(keys[i]));
        }
        return jsonObject.toString();
    }
    
    /**
     * json字符串 转换为 jobDataMap 
     * @param json
     * @return
     */
    public static JobDataMap json2jobDataMap(String json){
        JobDataMap jobDataMap = new JobDataMap();
        
        JSONObject jsonObject = JSONObject.fromObject(json);
        Iterator it = jsonObject.keys();  
        while (it.hasNext()) {  
            String key = (String) it.next();  
            String value = jsonObject.getString(key);
            jobDataMap.put(key, value);
        }
        
        return jobDataMap;
    }
    
}

2.简单使用

添加任务（cron表达式）

String job_name = "TestJob"+UUID.randomUUID();
String job = "com.peak.TestJob";//全路径
JobDataMap jobDataMap = new JobDataMap();
jobDataMap.put("uuid",""+UUID.randomUUID());
//cron表达式
String cron = "*/5 * * * * ?";
//简单的添加作业 
QuartzManager.addJob(job_name, job, cron,jobDataMap); 

任务(串行避免死锁)

//具体任务类，实现了StatefulJob（单例，串行避免死锁），可实现Job接口（多例，并行）
public class TestJob implements StatefulJob{

    //执行任务
    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {

            JobDetail jobDetail = context.getJobDetail();
            JobDataMap jobDataMap = jobDetail.getJobDataMap();
            //获取传入参数
            String uuid = jobDataMap.getString("uuid");
            //获取jobName
            String jobName = jobDetail.getName();
    }
}