**1. 什么是持久化** ```java @Slf4j public class UserJob extends QuartzJobBean { @Override protected void executeInternal(JobExecutionContext context) throws JobExecutionException { JobDataMap jobDataMap = context.getJobDetail().getJobDataMap(); //獲取從 JobDetail 中傳遞的 count，然后 +1 再存入 JobDetail jobDataMap.put("count", jobDataMap.getInt("count") + 1); log.info("count: {}", jobDataMap.getInt("count")); } } ``` 當被觸發器觸發時日志打印如下： ``` //可以看到，被同一個觸發器觸發的任務， //下一次任務記不住上一次任務傳遞的數據，這就是非持久化 2023-03-31T22:39:51 ...job.UserJob : count: 1 2023-03-31T22:39:55 ...job.UserJob : count: 1 2023-03-31T22:39:59 ...job.UserJob : count: 1 2023-03-31T22:40:03 ...job.UserJob : count: 1 2023-03-31T22:40:07 ...job.UserJob : count: 1 ``` <br/> **2. 開啟持久化** 如果要開啟持久化只需要標注注解`@PersistJobDataAfterExecution`即可。 ```java @Slf4j @PersistJobDataAfterExecution public class UserJob extends QuartzJobBean { @Override protected void executeInternal(JobExecutionContext context) throws JobExecutionException { JobDataMap jobDataMap = context.getJobDetail().getJobDataMap(); jobDataMap.put("count", jobDataMap.getInt("count") + 1); log.info("count: {}", jobDataMap.getInt("count")); } } ``` 當被觸發器觸發時日志打印如下： ``` //可以看到，被同一個觸發器觸發的任務， //下一次任務可以記住上一次任務傳遞的數據，這便是持久化的功能之一 2023-03-31T22:46:02 ...job.UserJob : count: 1 2023-03-31T22:46:06 ...job.UserJob : count: 2 2023-03-31T22:46:10 ...job.UserJob : count: 3 2023-03-31T22:46:14 ...job.UserJob : count: 4 2023-03-31T22:46:18 ...job.UserJob : count: 5 ``` >[info]持久化只對 JobDetail 中的 JobDataMap 有效，如果是觸發器的 JobDataMap 則是無效的。 ```java public class AccountJob extends QuartzJobBean { @Override protected void executeInternal(JobExecutionContext context) throws JobExecutionException { //JobDetail 中的 JobDataMap JobDataMap fromJobData = context.getJobDetail().getJobDataMap(); //觸發器中的 JobDataMap JobDataMap fromTriggerData = context.getTrigger().getJobDataMap(); } } ```