springboot使用quartz集群定时任务

简介

Quartz是一个完全由java编写的开源作业调度框架。不要让作业调度这个术语吓着你。尽管Quartz框架整合了许多额外功能， 但就其简易形式看，你会发现它易用得简直让人受不了！。简单地创建一个实现org.quartz.Job接口的java类。Job接口包含唯一的方法：

public void execute(JobExecutionContext context) throws JobExecutionException;

在你的Job接口实现类里面，添加一些逻辑到execute()方法。一旦你配置好Job实现类并设定好调度时间表，Quartz将密切注意剩余时间。当调度程序确定该是通知你的作业的时候，Quartz框架将调用你Job实现类（作业类）上的execute()方法并允许做它该做的事情。无需报告任何东西给调度器或调用任何特定的东西。仅仅执行任务和结束任务即可。如果配置你的作业在随后再次被调用，Quartz框架将在恰当的时间再次调用它。

单机部署问题

单机模式下的定时任务调用很简单，有很多可实现的方案，这里不多说了，例如spring schedule，java timer等。

这里说一下集群部署的情况下，定时任务的使用。这种情况下，quartz是一个比较好的选择。简单，稳定。

想象一下，现在有 A ， B ， C 3 台机器同时作为集群服务器对外统一提供 SERVICE ：

A ， B ， C 3 台机器上各有一个 QUARTZ Job，它们会按照即定的 SCHEDULE 自动执行各自的任务。

先不说实现什么功能，这样的架构有点像多线程。由于三台SERVER 里都有 QUARTZ ，因此会存在重复处理 TASK 的现象。

一般外面的解决方案是只在一台 服务器上装 QUARTZ ，其它两台不装，这样的话其实就是单机了，quartz存在单点问题，一旦装有quartz的服务器宕了。服务就无法提供了。

当然还有其他一些解决方案，无非就是改 QUARTZ JOB 的代码了，这对程序开发人员来说比较痛苦；

而quartz本身提供了很好的集群方案。下面我们来说一下在spring boot下的集成：

quartz集群需要数据库的支持（JobStore TX或者JobStoreCMT），从本质上来说，是使集群上的每一个节点通过共享同一个数据库来工作的

1 准备quartz基本环境

到quartz官网下载最新的包：http://www.quartz-scheduler.org/downloads/

解压后，可以看到结构目录。在\docs\dbTables下选择合适你数据库的SQL执行文件，创建quartz集群需要的表（共11张表）

找到自己使用的数据库脚本文件执行

image.png

数据库中对应表，注意：在windows环境下，mysql表名不确认大小写，linux下区分大小写

image.png

2 集成springboot（这里是1.5.3版本）

2.1引入依赖jar包

        <dependency>
            <groupId>org.quartz-scheduler</groupId>
            <artifactId>quartz</artifactId>
            <version>2.2.3</version>
        </dependency>
        <dependency>
            <groupId>org.quartz-scheduler</groupId>
            <artifactId>quartz-jobs</artifactId>
            <version>2.2.3</version>
        </dependency>

2.2 quartz配置

#quartz集群配置  
# ===========================================================================    
# Configure Main Scheduler Properties 调度器属性    
# ===========================================================================  
#调度标识名 集群中每一个实例都必须使用相同的名称    
org.quartz.scheduler.instanceName=DefaultQuartzScheduler  
#ID设置为自动获取 每一个必须不同  
org.quartz.scheduler.instanceid=AUTO    
#============================================================================  
# Configure ThreadPool    
#============================================================================  
#线程池的实现类（一般使用SimpleThreadPool即可满足几乎所有用户的需求）  
org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool  
#指定线程数，至少为1（无默认值）(一般设置为1-100直接的整数合适)  
org.quartz.threadPool.threadCount = 25  
#设置线程的优先级（最大为java.lang.Thread.MAX_PRIORITY 10，最小为Thread.MIN_PRIORITY 1，默认为5）   
org.quartz.threadPool.threadPriority = 5  
#============================================================================  
# Configure JobStore    
#============================================================================  
# 信息保存时间 默认值60秒   
org.quartz.jobStore.misfireThreshold = 60000  
#数据保存方式为数据库持久化  
org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX  
#数据库代理类，一般org.quartz.impl.jdbcjobstore.StdJDBCDelegate可以满足大部分数据库  
org.quartz.jobStore.driverDelegateClass = org.quartz.impl.jdbcjobstore.StdJDBCDelegate  
#JobDataMaps是否都为String类型  
org.quartz.jobStore.useProperties = false  
#数据库别名 随便取  
org.quartz.jobStore.dataSource = myDS  
#表的前缀，默认QRTZ_  
org.quartz.jobStore.tablePrefix = QRTZ_  
#是否加入集群  
org.quartz.jobStore.isClustered = true  
#调度实例失效的检查时间间隔  
org.quartz.jobStore.clusterCheckinInterval = 20000  
#============================================================================  
# Configure Datasources    
#============================================================================  
#数据库引擎  
org.quartz.dataSource.myDS.driver = com.mysql.jdbc.Driver  
#数据库连接  
org.quartz.dataSource.myDS.URL = jdbc:mysql://172.30.12.14:7001/rbl_test?useUnicode=true&characterEncoding=utf-8&useSSL=false&allowMultiQueries=true  
#数据库用户  
org.quartz.dataSource.myDS.user = root  
#数据库密码  
org.quartz.dataSource.myDS.password = 123456  
#允许最大连接  
org.quartz.dataSource.myDS.maxConnections = 5  
#验证查询sql,可以不设置  
org.quartz.dataSource.myDS.validationQuery=select 0 from dual 
注：如果嫌需要额外配置quart数据源很烦，也可以共用你项目配置的数据库链接，这样每次更换数据库连接，就不需要额外在修改。

2.3 springboot configuration 配置

直接使用springboot注入的的datasource的内容配置quartz的数据库连接

quartz属性配置可以读取配置文件读取，我这里没在配置文件读取，直接写在代码里测试的，意见新建一个配置文件里面写quartz的配置内容，然后通过springboot注入属性进来。

package com.kerry.config;


import java.io.IOException;
import java.util.Properties;

import javax.sql.DataSource;

import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;


/**
 * 分布式定时任务管理配置
 * @author kerry
 * @date 2018-05-09 11:36:21
 */
@Configuration
//@ConditionalOnProperty(prefix = "qybd", name = "quartz-open", havingValue = "true")
public class QuartzConfig{
    
    @Autowired
    DataSource dataSource;
    
    @Bean  
    public SchedulerFactoryBean schedulerFactoryBean(QuartzJobFactory myJobFactory) throws Exception {  
        SchedulerFactoryBean schedulerFactoryBean = new SchedulerFactoryBean();  
        schedulerFactoryBean.setDataSource(dataSource);  
        //使job实例支持spring 容器管理
        schedulerFactoryBean.setOverwriteExistingJobs(true);  
        schedulerFactoryBean.setJobFactory(myJobFactory);  
        schedulerFactoryBean.setQuartzProperties(quartzProperties());  
        // 延迟10s启动quartz  
        schedulerFactoryBean.setStartupDelay(10);  
  
        return schedulerFactoryBean;  
    }
    
    
    
    @Bean
    public Scheduler scheduler(SchedulerFactoryBean schedulerFactoryBean) throws IOException, SchedulerException {
//      SchedulerFactory schedulerFactory = new StdSchedulerFactory(quartzProperties());
//      Scheduler scheduler = schedulerFactory.getScheduler();
//      scheduler.start();//初始化bean并启动scheduler
         Scheduler scheduler = schedulerFactoryBean.getScheduler();  
         scheduler.start();
        return scheduler;
    }
    
    
    
    
    
    /**
     * 设置quartz属性
     */
    public Properties quartzProperties() throws IOException {
        Properties prop = new Properties();
        prop.put("quartz.scheduler.instanceName", "ServerScheduler");
        prop.put("org.quartz.scheduler.instanceId", "AUTO");
        prop.put("org.quartz.scheduler.skipUpdateCheck", "true");
        prop.put("org.quartz.scheduler.instanceId", "NON_CLUSTERED");
        prop.put("org.quartz.scheduler.jobFactory.class", "org.quartz.simpl.SimpleJobFactory");
        prop.put("org.quartz.jobStore.class", "org.quartz.impl.jdbcjobstore.JobStoreTX");
        prop.put("org.quartz.jobStore.driverDelegateClass", "org.quartz.impl.jdbcjobstore.StdJDBCDelegate");
        prop.put("org.quartz.jobStore.dataSource", "quartzDataSource");
        prop.put("org.quartz.jobStore.tablePrefix", "QRTZ_");
        prop.put("org.quartz.jobStore.isClustered", "true");
        prop.put("org.quartz.threadPool.class", "org.quartz.simpl.SimpleThreadPool");
        prop.put("org.quartz.threadPool.threadCount", "5");

//      prop.put("org.quartz.dataSource.quartzDataSource.driver", druidProperties.getDriverClassName());
//      prop.put("org.quartz.dataSource.quartzDataSource.URL", druidProperties.getUrl());
//      prop.put("org.quartz.dataSource.quartzDataSource.user", druidProperties.getUsername());
//      prop.put("org.quartz.dataSource.quartzDataSource.password", druidProperties.getPassword());
//      prop.put("org.quartz.dataSource.quartzDataSource.maxConnections", druidProperties.getMaxActive());
        return prop;
    }
    
}

注意上面的schedulerFactoryBean.setJobFactory(myJobFactory); //这个myJobFactory是自定义配置的一个类，如果这里不配置这个jobFactory，下面的那个CtripScenicTask会为空，获取不了注入对象

@Component
public class CtripScenicJob implements Job{
    
    private Logger logger = LoggerFactory.getLogger(CtripScenicJob.class);

    @Autowired
    private CtripScenicTask ctripScenicTask; 

这个类主要解决spring管理的Quartz job里面注入不了其他bean

package com.kerry.config;

import org.quartz.spi.TriggerFiredBundle;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.scheduling.quartz.AdaptableJobFactory;
import org.springframework.stereotype.Component;

@Component
public class QuartzJobFactory extends AdaptableJobFactory {
    
    //这个对象Spring会帮我们自动注入进来,也属于Spring技术范畴.
    @Autowired
    private AutowireCapableBeanFactory capableBeanFactory;
    
    protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
        //调用父类的方法
        Object jobInstance = super.createJobInstance(bundle);
        //进行注入,这属于Spring的技术,不清楚的可以查看Spring的API.
        capableBeanFactory.autowireBean(jobInstance);
        return jobInstance;
    }

}

2.4 动态配置管理quartz

接口类

package com.kerry.modular.biz.service;

import java.util.List;





import org.quartz.SchedulerException;

import com.kerry.modular.biz.model.TaskInfo;

public interface TaskService {

    List<TaskInfo> list();
    
    void addJob(TaskInfo info);
    
    void edit(TaskInfo info);
    
    void delete(String jobName, String jobGroup);
    
    void pause(String jobName, String jobGroup);
    
    void resume(String jobName, String jobGroup);
    
    boolean checkExists(String jobName, String jobGroup)throws SchedulerException;
}

实现类

package com.kerry.modular.biz.service;

import java.util.ArrayList;
import java.util.Date;
import java.util.HashSet;
import java.util.List;

import org.apache.commons.lang3.time.DateFormatUtils;
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.Job;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import org.quartz.impl.matchers.GroupMatcher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.kerry.modular.biz.model.TaskInfo;

@Service
public class TaskServiceImpl implements TaskService {
    private Logger logger = LoggerFactory.getLogger(TaskServiceImpl.class);
    
    @Autowired(required=false)
    private Scheduler scheduler;
    
    /**
     * 所有任务列表
     */
    public List<TaskInfo> list(){
        List<TaskInfo> list = new ArrayList<>();
        
        try {
            for(String groupJob: scheduler.getJobGroupNames()){
                for(JobKey jobKey: scheduler.getJobKeys(GroupMatcher.<JobKey>groupEquals(groupJob))){
                    List<? extends Trigger> triggers = scheduler.getTriggersOfJob(jobKey);
                    for (Trigger trigger: triggers) {
                        Trigger.TriggerState triggerState = scheduler.getTriggerState(trigger.getKey());
                        JobDetail jobDetail = scheduler.getJobDetail(jobKey);
                        
                        String cronExpression = "", createTime = "";
                        
                        if (trigger instanceof CronTrigger) {
                            CronTrigger cronTrigger = (CronTrigger) trigger;
                            cronExpression = cronTrigger.getCronExpression();
                            createTime = cronTrigger.getDescription();
                        }
                        TaskInfo info = new TaskInfo();
                        info.setJobName(jobKey.getName());
                        info.setJobGroup(jobKey.getGroup());
                        info.setJobDescription(jobDetail.getDescription());
                        info.setJobStatus(triggerState.name());
                        info.setCronExpression(cronExpression);
                        info.setCreateTime(createTime);
                        list.add(info);
                    }                   
                }
            }           
        } catch (SchedulerException e) {
            e.printStackTrace();
        }
        
        return list;
    }
    
    /**
     * 保存定时任务
     * @param info
     */
    @SuppressWarnings("unchecked")
    public void addJob(TaskInfo info) {
        String jobName = info.getJobName(), 
               jobGroup = info.getJobGroup(), 
               cronExpression = info.getCronExpression(),
               jobDescription = info.getJobDescription(),
               createTime = DateFormatUtils.format(new Date(), "yyyy-MM-dd HH:mm:ss");
        try {
            if (checkExists(jobName, jobGroup)) {
                logger.info("add job fail, job already exist, jobGroup:{}, jobName:{}", jobGroup, jobName);
            }
            
            TriggerKey triggerKey = TriggerKey.triggerKey(jobName, jobGroup);
            JobKey jobKey = JobKey.jobKey(jobName, jobGroup);
            
            CronScheduleBuilder schedBuilder = CronScheduleBuilder.cronSchedule(cronExpression).withMisfireHandlingInstructionDoNothing();
            CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(triggerKey).withDescription(createTime).withSchedule(schedBuilder).build();
        
        
            Class<? extends Job> clazz = (Class<? extends Job>)Class.forName(jobName);
            JobDetail jobDetail = JobBuilder.newJob(clazz).withIdentity(jobKey).withDescription(jobDescription).build();
            scheduler.scheduleJob(jobDetail, trigger);
        } catch (SchedulerException | ClassNotFoundException e) {
            logger.error("类名不存在或执行表达式错误,exception:{}",e.getMessage());
        }
    }
    
    /**
     * 修改定时任务
     * @param info
     */
    public void edit(TaskInfo info) {
        String jobName = info.getJobName(), 
               jobGroup = info.getJobGroup(), 
               cronExpression = info.getCronExpression(),
               jobDescription = info.getJobDescription(),
               createTime = DateFormatUtils.format(new Date(), "yyyy-MM-dd HH:mm:ss");
        try {
            if (!checkExists(jobName, jobGroup)) {
                logger.info("edit job fail, job is not exist, jobGroup:{}, jobName:{}", jobGroup, jobName);
            }
            TriggerKey triggerKey = TriggerKey.triggerKey(jobName, jobGroup);
            JobKey jobKey = new JobKey(jobName, jobGroup);
            CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(cronExpression).withMisfireHandlingInstructionDoNothing();
            CronTrigger cronTrigger = TriggerBuilder.newTrigger().withIdentity(triggerKey).withDescription(createTime).withSchedule(cronScheduleBuilder).build();
            
            JobDetail jobDetail = scheduler.getJobDetail(jobKey);
            jobDetail.getJobBuilder().withDescription(jobDescription);
            HashSet<Trigger> triggerSet = new HashSet<>();
            triggerSet.add(cronTrigger);
            
            scheduler.scheduleJob(jobDetail, triggerSet, true);
        } catch (SchedulerException e) {
            logger.error("类名不存在或执行表达式错误,exception:{}",e.getMessage());
        }
    }
    
    /**
     * 删除定时任务
     * @param jobName
     * @param jobGroup
     */
    public void delete(String jobName, String jobGroup){
        TriggerKey triggerKey = TriggerKey.triggerKey(jobName, jobGroup);
        try {
            if (checkExists(jobName, jobGroup)) {
                scheduler.pauseTrigger(triggerKey);
                scheduler.unscheduleJob(triggerKey);
                logger.info("delete job, triggerKey:{},jobGroup:{}, jobName:{}", triggerKey ,jobGroup, jobName);
            }
        } catch (SchedulerException e) {
            logger.error(e.getMessage());
        }
    }
    
    /**
     * 暂停定时任务
     * @param jobName
     * @param jobGroup
     */
    public void pause(String jobName, String jobGroup){
        TriggerKey triggerKey = TriggerKey.triggerKey(jobName, jobGroup);
        try {
            if (checkExists(jobName, jobGroup)) {
                scheduler.pauseTrigger(triggerKey);
                logger.info("pause job success, triggerKey:{},jobGroup:{}, jobName:{}", triggerKey ,jobGroup, jobName);
            }
        } catch (SchedulerException e) {
            logger.error(e.getMessage());
        }
    }
    
    /**
     * 重新开始任务
     * @param jobName
     * @param jobGroup
     */
    public void resume(String jobName, String jobGroup){
        TriggerKey triggerKey = TriggerKey.triggerKey(jobName, jobGroup);
        
        try {
            if (checkExists(jobName, jobGroup)) {
                scheduler.resumeTrigger(triggerKey);
                logger.info("resume job success,triggerKey:{},jobGroup:{}, jobName:{}", triggerKey ,jobGroup, jobName);
            }
        } catch (SchedulerException e) {
            logger.error(e.getMessage());
        }
    }
    
    /**
     * 验证是否存在
     * @param jobName
     * @param jobGroup
     * @throws SchedulerException
     */
    public boolean checkExists(String jobName, String jobGroup) throws SchedulerException{
        TriggerKey triggerKey = TriggerKey.triggerKey(jobName, jobGroup);
        return scheduler.checkExists(triggerKey);
    }
}

taskinfo实体类

package com.kerry.modular.biz.model;

import java.io.Serializable;

public class TaskInfo implements Serializable{
    private static final long serialVersionUID = -8054692082716173379L;
    private int id = 0;

    /**任务名称*/
    private String jobName;
    
    /**任务分组*/
    private String jobGroup;
    
    /**任务描述*/
    private String jobDescription;
    
    /**任务状态*/
    private String jobStatus;
    
    /**任务表达式*/
    private String cronExpression;
    
    private String createTime;

    public String getJobName() {
        return jobName;
    }

    public void setJobName(String jobName) {
        this.jobName = jobName;
    }

    public String getJobGroup() {
        return jobGroup;
    }

    public void setJobGroup(String jobGroup) {
        this.jobGroup = jobGroup;
    }

    public String getJobDescription() {
        return jobDescription;
    }

    public void setJobDescription(String jobDescription) {
        this.jobDescription = jobDescription;
    }

    public String getJobStatus() {
        return jobStatus;
    }

    public void setJobStatus(String jobStatus) {
        this.jobStatus = jobStatus;
    }

    public String getCronExpression() {
        return cronExpression;
    }

    public void setCronExpression(String cronExpression) {
        this.cronExpression = cronExpression;
    }

    public String getCreateTime() {
        return createTime;
    }

    public void setCreateTime(String createTime) {
        this.createTime = createTime;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
}

任务管理Controller类

package com.kerry.modular.biz.controller;


import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.alibaba.fastjson.JSON;
import com.kerry.modular.biz.model.TaskInfo;
import com.kerry.modular.biz.service.TaskService;

/**
 * 任务管理
 */
@Controller
@RequestMapping("/qy/api/task/")
public class TaskManageController {
    
    @Autowired(required=false)
    private TaskService taskService;

    /**
     * Index.jsp
     */
    @RequestMapping(value={"", "/", "index"})
    public String info(){
        return "index.jsp";
    }
    
    /**
     * 任务列表
     * @return
     */
    @ResponseBody
    @RequestMapping(value="list")
    public String list(){
        Map<String, Object> map = new HashMap<>();
        List<TaskInfo> infos = taskService.list();
        map.put("rows", infos);
        map.put("total", infos.size());
        return JSON.toJSONString(map);
    }
    
    /**
     * 保存定时任务
     * @param info
     */
    @ResponseBody
    @RequestMapping(value="save", produces = "application/json; charset=UTF-8")
    public String save(TaskInfo info){
        try {
            if(info.getId() == 0) {
                taskService.addJob(info);
            }else{
                taskService.edit(info);
            }
        } catch (Exception e) {
            return e.getMessage();
        }
        return "成功";
    }
    
    /**
     * 删除定时任务
     * @param jobName
     * @param jobGroup
     */
    @ResponseBody
    @RequestMapping(value="delete/{jobName}/{jobGroup}", produces = "application/json; charset=UTF-8")
    public String delete(@PathVariable String jobName, @PathVariable String jobGroup){
        try {
            taskService.delete(jobName, jobGroup);
        } catch (Exception e) {
            return e.getMessage();
        }
        return "成功";
    }
    
    /**
     * 暂停定时任务
     * @param jobName
     * @param jobGroup
     */
    @ResponseBody
    @RequestMapping(value="pause/{jobName}/{jobGroup}", produces = "application/json; charset=UTF-8")
    public String pause(@PathVariable String jobName, @PathVariable String jobGroup){
        try {
            taskService.pause(jobName, jobGroup);
        } catch (Exception e) {
            return e.getMessage();
        }
        return "成功";
    }
    
    /**
     * 重新开始定时任务
     * @param jobName
     * @param jobGroup
     */
    @ResponseBody
    @RequestMapping(value="resume/{jobName}/{jobGroup}", produces = "application/json; charset=UTF-8")
    public String resume(@PathVariable String jobName, @PathVariable String jobGroup){
        try {
            taskService.resume(jobName, jobGroup);
        } catch (Exception e) {
            return e.getMessage();
        }
        return "成功";
    }
}

任务实现类实现job接口，重写execute方法

package com.kerry.modular.biz.task.quartz;


import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.kerry.modular.biz.task.schedule.CtripScenicTask;

@Component
public class CtripScenicJob implements Job{
    
    private Logger logger = LoggerFactory.getLogger(CtripScenicJob.class);

    @Autowired
    private CtripScenicTask ctripScenicTask;
    
    @Override
    public void execute(JobExecutionContext context)
            throws JobExecutionException {
        logger.info("JobName: {}", context.getJobDetail().getKey().getName());
        ctripScenicTask.loadComment();
    }
    
    

}

此时可以通过调用TaskManageController时间动态控制定时任务

3 测试，启动springboot项目

输入添加任务的url：

http://localhost:8080/qy/api/task/save?jobName=com.stylefeng.guns.modular.biz.task.quartz.CtripHotelJob&jobGroup=group1&jobDescription=job描述&cronExpression=0/10 * * * * ?

jobName为job类的包名类名，jobGroup该任务所属组，jobDescription 描述，cronExpression ：core表达式

上面的请求会添加一个定时任务，每10秒执行一次 CtripHotelJob里面的execute方法。

保存的定时任务会在quartz相关表里保存数据

如：

image.png