# 在 Quartz 作業中注入 Spring 依賴項 > 原文： [https://howtodoinjava.com/spring-batch/spring-beans-in-quartz-job/](https://howtodoinjava.com/spring-batch/spring-beans-in-quartz-job/) 默認情況下，Quartz 無法識別在`applicationContext.xml`或帶有`@Bean`注解的 SpringBean。 如果嘗試以 Quartz `Job`或`QuartzJobBean`來`@Autowired`這些 bean，您將得到`NullPointerException`。 ## 將 Spring 上下文注入`QuartzJobBean` 解決方案是將 Spring 的`ApplicationContext`實例注入到`org.quartz.SchedulerContext`中，該實例可通過`executeInternal()`方法的`org.quartz.JobExecutionContext`參數使用。 1. #### 將`ApplicationContext`注入`SchedulerContext` 這是典型的`SchedulerFactoryBean` bean 條目。 使用[`setApplicationContextSchedulerContextKey()`](https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/scheduling/quartz/SchedulerFactoryBean.html#setApplicationContextSchedulerContextKey-java.lang.String-)方法。 此方法設置要在`SchedulerContext`中公開的`ApplicationContext`引用的鍵。 ```java @Bean public SchedulerFactoryBean schedulerFactoryBean() throws IOException, SchedulerException { SchedulerFactoryBean scheduler = new SchedulerFactoryBean(); scheduler.setTriggers(jobOneTrigger(), jobTwoTrigger()); scheduler.setQuartzProperties(quartzProperties()); scheduler.setJobDetails(jobOneDetail(), jobTwoDetail()); scheduler.setApplicationContextSchedulerContextKey("applicationContext"); return scheduler; } ``` 2. #### 在 Quartz QuartzJobBean 中訪問注入 bean 現在，您需要做的就是 – 獲得`applicationContext`參考，并根據需要開始獲取 bean。 `CustomQuartzJob.java` ```java import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; import org.springframework.batch.core.Job; import org.springframework.batch.core.JobParameters; import org.springframework.batch.core.JobParametersBuilder; import org.springframework.batch.core.configuration.JobLocator; import org.springframework.batch.core.launch.JobLauncher; import org.springframework.context.ApplicationContext; import org.springframework.scheduling.quartz.QuartzJobBean; public class CustomQuartzJob extends QuartzJobBean { private String jobName; private JobLauncher jobLauncher; private JobLocator jobLocator; public String getJobName() { return jobName; } public void setJobName(String jobName) { this.jobName = jobName; } @Override protected void executeInternal(JobExecutionContext context) throws JobExecutionException { try { ApplicationContext applicationContext = (ApplicationContext) context.getScheduler().getContext().get("applicationContext"); jobLocator = (JobLocator) applicationContext.getBean(JobLocator.class); jobLauncher = (JobLauncher) applicationContext.getBean(JobLauncher.class); Job job = jobLocator.getJob(jobName); JobParameters params = new JobParametersBuilder() .addString("JobID", String.valueOf(System.currentTimeMillis())) .toJobParameters(); jobLauncher.run(job, params); } catch (Exception e) { e.printStackTrace(); } } } ``` 現在，當您運行 Quartz 作業時，將通過`executeInternal()`方法獲得`jobLocator`和`jobLauncher`實例。 將我的問題放在評論部分。 學習愉快！