Java 为什么石英示例代码可以'；不能在Junit中测试吗？

我正在运行这个

quartz-2.1.0\examples\src\main\java\org\quartz\examples\example3

示例代码，它运行得非常好，但是如果我将

CronTriggerExample.java

中的

main

代码移动到junit测试类中，作业就不会运行。 下面是quartz示例代码（为了简化，我截断了它们，您可以从quartz网站获得完整的代码）

SimpleJob.java:

public class SimpleJob implements Job {
  private static Logger _log = LoggerFactory.getLogger(SimpleJob.class);

  public void execute(JobExecutionContext context) throws JobExecutionException {
    JobKey jobKey = context.getJobDetail().getKey();
    _log.info("SimpleJob says: " + jobKey + " executing at " + new Date());
  }
}

public class CronTriggerExample {
    public void run() throws Exception {
        Logger log = LoggerFactory.getLogger(CronTriggerExample.class);
        SchedulerFactory sf = new StdSchedulerFactory();
        Scheduler sched = sf.getScheduler();
        JobDetail job = newJob(SimpleJob.class)
            .withIdentity("job1", "group1")
            .build();
        CronTrigger trigger = newTrigger()
            .withIdentity("trigger1", "group1")
            .withSchedule(cronSchedule("0/3 * * * * ?"))
            .build();

        Date ft = sched.scheduleJob(job, trigger);
        log.info(job.getKey() + " has been scheduled to run at: " + ft
            + " and repeat based on expression: "
            + trigger.getCronExpression());

        sched.start();
    }

    public static void main(String[] args) throws Exception {
        CronTriggerExample example = new CronTriggerExample();
        example.run();
    }
}

crontriggereExample.java:

public class SimpleJob implements Job {
  private static Logger _log = LoggerFactory.getLogger(SimpleJob.class);

  public void execute(JobExecutionContext context) throws JobExecutionException {
    JobKey jobKey = context.getJobDetail().getKey();
    _log.info("SimpleJob says: " + jobKey + " executing at " + new Date());
  }
}

public class CronTriggerExample {
    public void run() throws Exception {
        Logger log = LoggerFactory.getLogger(CronTriggerExample.class);
        SchedulerFactory sf = new StdSchedulerFactory();
        Scheduler sched = sf.getScheduler();
        JobDetail job = newJob(SimpleJob.class)
            .withIdentity("job1", "group1")
            .build();
        CronTrigger trigger = newTrigger()
            .withIdentity("trigger1", "group1")
            .withSchedule(cronSchedule("0/3 * * * * ?"))
            .build();

        Date ft = sched.scheduleJob(job, trigger);
        log.info(job.getKey() + " has been scheduled to run at: " + ft
            + " and repeat based on expression: "
            + trigger.getCronExpression());

        sched.start();
    }

    public static void main(String[] args) throws Exception {
        CronTriggerExample example = new CronTriggerExample();
        example.run();
    }
}

如果我将

main

方法中的两行代码移动到junit测试类（junit4），上面的代码运行良好，如下所示：

public class Test1 {
    @Test
    public void run() throws Exception {
        CronTriggerExample example = new CronTriggerExample();
        example.run();
    }
}

作业无法运行

---

我很困惑为什么同一段代码不能在junit中运行？

要自己看看这个问题，我建议在像Eclipse这样的IDE中以调试模式运行这两段不同的代码

在

main

中运行这两行时，即使

main

终止，您创建的Quartz调度程序也会继续运行

当您在JUnit中运行这两行时，JUnit框架会在所有单元测试终止时杀死所有剩余的线程

为了让时间触发您的工作，您应该使用以下命令更改JUnit测试

public class Test1 {
    @Test
    public void run() throws Exception {
        CronTriggerExample example = new CronTriggerExample();
        example.run();

        Thread.sleep(240000); // Sleep 4 minutes (4*60*1.000 = 240.000)
    }
 }

---

您需要在石英线程运行时阻塞主线程，否则，正如@Kraiss所说，测试几乎会立即终止。要在测试中做任何有用的事情，比如从那些Quartz创建的线程执行断言，您可以使用类似的帮助