为什么我的计划任务没有运行

Question

我有一个计划任务，该任务从JSP页面获取主机名和其他Calendar信息。 对于“ HOUR_of_Day”输入，我总是添加12并将总数传递给Calender，因为它使用24小时格式。 我昨天晚上做的很好，但是今天早上不工作。 它不会在计划的时间运行。 我当然做错了，需要一些指导。 下面是我的代码：

import java.util.Calendar;
import java.util.Timer;
import java.util.TimerTask;


public class ScheduledTask extends TimerTask {

     String hostname = null; 

     //The default no - arg constructor
     //=============================
     public ScheduledTask(){

     }


     /**
      * Another overloaded constructor
      * that accepts an object
      * @param scanHostObj

    public ScheduledTask(ScanHost scanHostObj){

        hostname = scanHostObj.getHostname();

    }


    /**
     * Another overloaded constructor
     * that accepts a string parameter
     * @param nodename
     */
    public ScheduledTask(String nodename){
       hostname = nodename; 
    }

    /**
     * The run method that executes 
     * the scheduled task
     */
    public void run() {

        new ScanUtility().performHostScan(hostname);

    }


    public void executeScheduledScanJob(ScanHost hostObj, Scheduler schedulerObj){ 

        /**
         * Get the various schedule 
         * data, convert to appropriate data type
         * and feed to calender class
         */
        String nodename = hostObj.getHostname();
        String dayOfScan = schedulerObj.getDayOfScan();
        String hourOfScan = schedulerObj.getHourOfScan();
        String minuteOfScan = schedulerObj.getMinuteofScan();

        //Convert String values to integers
        //===================================
        final int  THE_DAY =  Integer.parseInt(dayOfScan);
        final int  THE_HOUR = Integer.parseInt(hourOfScan);
        final int  REAL_HOUR = THE_HOUR + 12;
        final int  THE_MINUTE = Integer.parseInt(minuteOfScan);

        /**
         * Feed these time values to the Calendar class.
         * Since Calendar takes a 24 - hour format for hours
         * it is better to add 12 to any integer value for
         * hours to bring the real hourly format to the 24
         * format required by the Calendar class
         */
        Calendar scheduleCalendar = Calendar.getInstance(); 
        scheduleCalendar.set(Calendar.DAY_OF_WEEK,  THE_DAY);
        scheduleCalendar.set(Calendar.HOUR_OF_DAY,   REAL_HOUR);
        scheduleCalendar.set(Calendar.MINUTE,    THE_MINUTE);


        /**
         * Then Initialize the timer Object
         * and pass in parameters to it method
         * cancel out all tasks/jobs after running them
         */

         Timer scheduledTimeObj = new Timer(); 
         ScheduledTask scheduledTaskObj = new ScheduledTask(nodename);

        scheduledTimeObj.schedule(scheduledTaskObj, scheduleCalendar.getTime());

        scheduledTimeObj.cancel();
        scheduledTaskObj.cancel();

    }




}

Answer 1

您可以尝试更换

  scheduleCalendar.set(Calendar.HOUR_OF_DAY,   REAL_HOUR);

有了这个：

 scheduleCalendar.set(Calendar.HOUR,   THE_HOUR);

这将需要12个小时的格式。

此外，您可以将AM_PM设置为AM或PM。 如果您尝试解析PM日期，请在此处使用PM。

scheduleCalendar.set(Calendar.AM_PM,   Calendar.PM);