1、maven引入quartz包

<!-- https://mvnrepository.com/artifact/org.quartz-scheduler/quartz --><dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>2.3.2</version></dependency>

2、创建定时任务工厂类

/** * 定时任务工厂类 */@Componentpublic class JobFactory extends SpringBeanJobFactory implements ApplicationContextAware { private transient AutowireCapableBeanFactory beanFactory; @Override protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception { final Object jobInstance = super.createJobInstance(bundle); beanFactory.autowireBean(jobInstance); return jobInstance; } @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { this.beanFactory = applicationContext.getAutowireCapableBeanFactory(); }}

3、创建定时任务抽象类

public abstract class AbstractTask implements Job { private Logger logger = LoggerFactory.getLogger(AbstractTask.class); protected abstract void executeInternal(JobExecutionContext context) throws Exception; /** * 定时任务标识 */ private String key; /** * 数据库里配置的主键id */ private Long dataBaseId; @Override public void execute(JobExecutionContext context) { try { executeInternal(context); } catch (Exception e) { logger.error(e.getMessage(), e); logger.error("job execute failed!"); } } public String getKey() { return key; } public void setKey(String key) { this.key = key; } public Long getDataBaseId() { return dataBaseId; } public void setDataBaseId(Long dataBaseId) { this.dataBaseId = dataBaseId; }}

4、创建定时任务业务实现类

这里可以写你的业务代码，实现具体的业务逻辑。

@Component("JobTask")public class JobTask extends AbstractTask { @Override protected void executeInternal(JobExecutionContext context) { System.out.println("key = " + this.getKey()); System.out.println("dataBaseId = " + this.getDataBaseId()); }}

5、创建定时任务管理器

包括项目启动时添加定时任务，手动添加定时任务，更新定时任务，删除定时任务方法。

/** * 定时任务管理容器 component （单例模式） */@Component@Scope("singleton")public class JobQuartzManager implements ApplicationContextAware { /** * 创建新的scheduler */ private static SchedulerFactory schedulerFactory = new StdSchedulerFactory(); private Scheduler scheduler; /** * 定义组名称，不同的组用于区分任务 */ private static final String JOB_GROUP_NAME = "JOB_GROUP_NAME"; private static final String TRIGGER_GROUP_NAME = "TRIGGER_GROUP_NAME"; /** * 日志 */ private Logger logger = LoggerFactory.getLogger(JobQuartzManager.class); private ApplicationContext applicationContext; @Autowired private JobFactory jobFactory; public void start() { //启动定时任务（初始化） try { this.scheduler = schedulerFactory.getScheduler(); scheduler.setJobFactory(jobFactory); //设置定时任务工厂模式 //项目启动时默认给spring容器添加动态的定时任务 this.addJob("job" + 100L, 100L, JobTask.class, "0/2 * * * * ?"); } catch (SchedulerException e) { logger.error(e.getMessage(), e); throw new RuntimeException("init Scheduler failed"); } } public boolean addJob(String jobName, Long dataBaseId, Class jobClass, String cronExp) { boolean result = false; if (!CronExpression.isValidExpression(cronExp)) { logger.error("Illegal cron expression format({})", cronExp); return result; } try { JobDetail jobDetail = JobBuilder.newJob().withIdentity(new JobKey(jobName, JOB_GROUP_NAME)) .ofType((Class<AbstractTask>) Class.forName(jobClass.getName())) .build(); //创建完jobDetail之后，使用语句传参数值，方便定时任务内部识别它是什么标识 JobDataMap jobDataMap = jobDetail.getJobDataMap(); jobDataMap.put("key", jobName); jobDataMap.put("dataBaseId", dataBaseId); Trigger trigger = TriggerBuilder.newTrigger() .forJob(jobDetail) .withSchedule(CronScheduleBuilder.cronSchedule(cronExp)) .withIdentity(new TriggerKey(jobName, TRIGGER_GROUP_NAME)) .build(); scheduler.scheduleJob(jobDetail, trigger); scheduler.start(); result = true; } catch (Exception e) { logger.error(e.getMessage(), e); logger.error("QuartzManager add job failed"); } return result; } public boolean updateJob(String jobName, String cronExp) { boolean result = false; if (!CronExpression.isValidExpression(cronExp)) { logger.error("Illegal cron expression format({})", cronExp); return result; } JobKey jobKey = new JobKey(jobName, JOB_GROUP_NAME); TriggerKey triggerKey = new TriggerKey(jobName, TRIGGER_GROUP_NAME); try { if (scheduler.checkExists(jobKey) && scheduler.checkExists(triggerKey)) { JobDetail jobDetail = scheduler.getJobDetail(jobKey); Trigger newTrigger = TriggerBuilder.newTrigger() .forJob(jobDetail) .withSchedule(CronScheduleBuilder.cronSchedule(cronExp)) .withIdentity(new TriggerKey(jobName, TRIGGER_GROUP_NAME)) .build(); scheduler.rescheduleJob(triggerKey, newTrigger); result = true; } else { logger.error("update job name:{},group name:{} or trigger name:{},group name:{} not exists..", jobKey.getName(), jobKey.getGroup(), triggerKey.getName(), triggerKey.getGroup()); } } catch (SchedulerException e) { logger.error(e.getMessage(), e); logger.error("update job name:{},group name:{} failed!", jobKey.getName(), jobKey.getGroup()); } return result; } public boolean deleteJob(String jobName) { boolean result = false; JobKey jobKey = new JobKey(jobName, JOB_GROUP_NAME); try { if (scheduler.checkExists(jobKey)) { result = scheduler.deleteJob(jobKey); } else { logger.error("delete job name:{},group name:{} not exists.", jobKey.getName(), jobKey.getGroup()); } } catch (SchedulerException e) { logger.error(e.getMessage(), e); logger.error("delete job name:{},group name:{} failed!", jobKey.getName(), jobKey.getGroup()); } return result; } @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { this.applicationContext = applicationContext; }}

6、创建定时任务启动类

项目运行时给spring注入定时任务

/** * 定时任务启动类 */@Componentpublic class JobRunner implements ApplicationRunner { //注入定时任务管理器 @Autowired private JobQuartzManager quartzManager; /** * 项目启动时激活定时任务 */ @Override public void run(ApplicationArguments applicationArguments) { System.out.println("--------------------注入定时任务---------------------"); quartzManager.start(); System.out.println("--------------------定时任务注入完成---------------------"); }}

7、测试案例

@RestController@RequestMapping("/job")public class JobController { @Autowired JobQuartzManager quartzManager; @PostMapping("addJob") @ResponseBody public String addJob(@RequestParam("dataBaseId") Long dataBaseId, @RequestParam("cronExp") String cronExp){ boolean success = quartzManager.addJob("job" + dataBaseId, dataBaseId, JobTask.class, cronExp); if(success){ return "添加成功"; }else{ return "添加失败！"; } } @PostMapping("deleteJob") @ResponseBody public String deleteJob(@RequestParam("jobName") String jobName){ boolean success = quartzManager.deleteJob(jobName); if(success){ return "删除成功"; }else{ return "删除失败！"; } } @PostMapping("updateJob") @ResponseBody public String updateJob(@RequestParam("jobName") String jobName, @RequestParam("cronExp") String cronExp){ boolean success = quartzManager.updateJob(jobName, cronExp); if(success){ return "更新成功"; }else{ return "更新失败！"; } }}

总结

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