在特定时间运行Java程序 [英] run a Java program in specific time

问题描述

我需要帮助在特定时间（例如索引新文件）在服务器上运行我的Java程序。

i need help to run my Java program on the server at a specific time like 2 pm (to index the new files).

有人告诉我Java已经有些东西叫做工作，但我不知道如何使用它。我试过这个：

Someone told me that Java has some thing called jobs but I don't know how to work with that. I tried this:

 boolean cond=true;
 while(cond){
     @SuppressWarnings("deprecation")
     int heur = new Date().getHours();
     @SuppressWarnings("deprecation")
     int minute= new Date().getMinutes();
     if(heur==16 && minute==02){
         indexer.close();
         end = new Date().getTime();
         File f;
         cond=false;
     }

但是这个程序仍在运行。

But with this the program is still running.

我如何在指定时间运行我的程序？

How could I run my program at a specified time?

推荐答案

Theres a API名为 Quartz ，这是您的程序可以安排作业的地方，它将在那时运行它。

Theres a API called Quartz, It's where your program can schedule "Jobs" and it will run it at that time.

在我举一个例子之前，试试此链接。

Until I can give an example, try this link.

编辑：
首先，您必须创建一个实现org.quartz.Job的类。当你实现它时，你将不得不实现方法 execute（JobExecutionContext jobExecution），这是在触发触发器时将运行的方法。

First you have to create a class that implements org.quartz.Job. When you implement that you will have to implement the method execute(JobExecutionContext jobExecution), which is the method that will run when the "trigger" is fired.

设置时间表：

SchedulerFactory schedulerFactory = new StdSchedulerFactory();
// Retrieve a scheduler from schedule factory
Scheduler scheduler = null;
try {
    scheduler = schedulerFactory.getScheduler();
}
catch (SchedulerException e) {
    e.printStackTrace();
}

//Set up detail about the job 
JobDetail jobDetail = new JobDetail("jobDetail", "jobDetailGroup", ImplementedJob.class);
SimpleTrigger simpleTrigger = new SimpleTrigger("Trigger Name","defaultGroup", DATE);

// schedule a job with JobDetail and Trigger
scheduler.scheduleJob(jobDetail, simpleTrigger);
// start the scheduler
scheduler.start();

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