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一、使用示例

自定义 job：

@Slf4j
public class MyJob extends QuartzJobBean {@Overrideprotected void executeInternal(JobExecutionContext context) throws JobExecutionException {log.info("MyJob start...");long start = System.currentTimeMillis();MyService myService = (MyService) context.getMergedJobDataMap().get("myService");try {myService.func();} catch (Exception e) {log.error("MyJob error: ", e);}long end = System.currentTimeMillis();log.info("MyJob end in {} ms", end - start);}
}

配置 detail、trigger 和 schedule：

@Configuration
public class QuartzConfig {@Setter(onMethod_ = {@Autowired})private MyService myService;@Beanpublic JobDetailFactoryBean myJobDetail() {JobDetailFactoryBean detail = new JobDetailFactoryBean();detail.setJobClass(MyJob.class);detail.setDurability(true);Map<String, Object> jobData = new HashMap<>();jobData.put("myService", myService);detail.setJobDataAsMap(jobData);return detail;}@Beanpublic CronTriggerFactoryBean myJobTriggerBean() {CronTriggerFactoryBean trigger = new CronTriggerFactoryBean();trigger.setJobDetail(Objects.requireNonNull(myJobDetail().getObject()));trigger.setCronExpression("*/5 * * * * ?");  // 每 5 秒钟执行一次return trigger;}@Beanpublic SchedulerFactoryBean schedulerFactoryBean() {SchedulerFactoryBean schedulerFactoryBean = new SchedulerFactoryBean();schedulerFactoryBean.setTriggers(myJobTriggerBean().getObject());return schedulerFactoryBean;}
}

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二、运行原理

SchedulerFactoryBean 重写了 Lifecycle 的 start() 方法，该方法会在 Spring 容器启动时自动执行，从而启动定时任务。

此外，JobDetailFactoryBean 和 CronTriggerFactoryBean 均实现了 FactoryBean 和 InitializingBean，它们会在执行 afterPropertiesSet() 时初始化并 set 对应的 JobDetail 和 CronTrigger，并在调用 getObject() 时返回。

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参考：

https://juejin.cn/post/6844903954615107597
https://juejin.cn/post/7086353052222881829