Quartz 查看定时任务信息（cron表达式，下次运行时间）

红太狼 2022-10-07 02:55 242阅读 0赞

# 1 Maven依赖 #

<dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-all</artifactId>
                <version>5.5.1</version>
            </dependency>
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-quartz</artifactId>
    		</dependency>

### 2 调试代码 ###

package com.controller;
    
    import cn.hutool.core.date.DateUtil;
    import org.quartz.*;
    import org.quartz.impl.JobDetailImpl;
    import org.quartz.impl.matchers.GroupMatcher;
    import org.quartz.impl.triggers.CronTriggerImpl;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.scheduling.quartz.SchedulerFactoryBean;
    import org.springframework.web.bind.annotation.*;
    
    import java.util.*;
    
    @RestController
    @RequestMapping("/quartz")
    public class QuartzController {
        @Autowired
        private SchedulerFactoryBean schedulerFactoryBean;
    
        /**
         * 获取所有定时任务
         *
         * @return
         */
        @GetMapping("/getJobList")
        public List<Map<String, String>> getJobList() {
            List<Map<String, String>> jobList = new ArrayList<>();
            try {
                //获取Scheduler
                Scheduler scheduler = schedulerFactoryBean.getScheduler();
                //再获取Scheduler下的所有group
                List<String> triggerGroupNames = scheduler.getTriggerGroupNames();
                for (String groupName : triggerGroupNames) {
                    //组装group的匹配，为了模糊获取所有的triggerKey或者jobKey
                    GroupMatcher groupMatcher = GroupMatcher.groupEquals(groupName);
                    //获取所有的triggerKey
                    Set<TriggerKey> triggerKeySet = scheduler.getTriggerKeys(groupMatcher);
                    for (TriggerKey triggerKey : triggerKeySet) {
                        //通过triggerKey在scheduler中获取trigger对象
                        CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);
                        //获取trigger拥有的Job
                        JobKey jobKey = trigger.getJobKey();
                        JobDetailImpl jobDetail = (JobDetailImpl) scheduler.getJobDetail(jobKey);
                        //组装需要显示的数据
                        Map<String, String> jobMap = new HashMap<>();
                        //分组名称
                        jobMap.put("groupName", groupName);
                        //定时任务名称
                        jobMap.put("jobDetailName", jobDetail.getName());
                        //cron表达式
                        String cronExpression = trigger.getCronExpression();
                        jobMap.put("jobCronExpression", cronExpression);
                        //时区
                        jobMap.put("timeZone", trigger.getTimeZone().getID());
                        //下次运行时间
                        CronTriggerImpl cronTriggerImpl = new CronTriggerImpl();
                        cronTriggerImpl.setCronExpression(cronExpression);
                        List<Date> dates = TriggerUtils.computeFireTimes(cronTriggerImpl, null, 20);
                        jobMap.put("nextRunDateTime", DateUtil.format(dates.get(0), "yyyy-MM-dd HH:mm:ss"));
                        jobList.add(jobMap);
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return jobList;
        }
    }

### 3 调试结果 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTc0NjM4_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTc0NjM4_size_16_color_FFFFFF_t_70]: /images/20221005/13d09b9aef374731a84dc32957d633e1.png