[英]how to execute the code in the specific time using timertask
嗨,這是我的聽眾課
public void contextInitialized(ServletContextEvent arg0) {
// TODO Auto-generated method stub
System.out.println("inside listener context");
Timer timer = new Timer();
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 19);
cal.set(Calendar.MINUTE, 00);
cal.set(Calendar.SECOND, 00);
Time sqlTime4 = new Time(cal.getTime().getTime());
timer.schedule(new MyTimerTask(),sqlTime4);
}
這是我的timertask類
package com.uttara.reg;
import java.util.Date;
import java.util.TimerTask;
public class Timer extends TimerTask {
@Override
public void run() {
// TODO Auto-generated method stub
System.out.println("inside run of timer");
}
public void scheduleAtFixedRate(TimerTask timerTask, Date executionDate, long period)
{
System.out.println("run");
// TODO Auto-generated method stub
}
}
該任務未在特定事件中觸發,任何人都可以糾正其中的問題嗎?
提前致謝
為什么要創建自己的Timer類,應該在java.util.timer中重用該類
只需使用以下代碼並刪除Timer類。
public static void main(final String[] args) {
System.out.println("inside listener context");
final Timer timer = new Timer();
final Date executionDate = new Date();
final long period = 24 * 60 * 60 * 1000;
timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
System.out.println("inside lisner run con");
}
}, executionDate,
period);
確保您導入了正確的Timer類
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
您的代碼中存在多個問題,它們是:
Timer
是java.util
包中定義的類,該類用於創建計划任務。 您可以嘗試像這樣更改代碼:
public void contextInitialized(ServletContextEvent arg0) {
// TODO Auto-generated method stub
System.out.println("inside listener context");
Timer timer = new Timer();
Date executionDate = new Date();
long period = 24 * 60 * 60 * 1000;
timer.scheduleAtFixedRate(new MyTimerTask(), executionDate, period);
}
MyTimerTask
package com.uttara.reg;
import java.util.Date;
import java.util.TimerTask;
public class MyTimerTask extends TimerTask {
@Override
public void run() {
// TODO Auto-generated method stub
System.out.println("inside run of timer");
}
public void scheduleAtFixedRate(TimerTask timerTask, Date executionDate, long period)
{
System.out.println("run");
// TODO Auto-generated method stub
}
}
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