Java中calendar定时任务的小栗子~

前言

我们经常会用到定时任务，直接用Thread显然不合适,这里我们采用calendar，封装好的一个线程任务，来实现定时任务

代码

package com;import java.util.TimerTask;public class NFDFlightDataTimerTask extends TimerTask {    @Override    public void run() {        try {        //需要循环的内容                } catch (Exception e) {        }    }}

package com;import java.util.Calendar;import java.util.Date;import java.util.Timer;public class TimerManager {    // private static final long PERIOD_DAY = 24 * 60 * 60 * 1000;    // 相隔多长时间执行一次    private static final long PERIOD_DAY = 15 * 60 * 1000;    public TimerManager(String startUrl) {        Calendar calendar = Calendar.getInstance();        calendar.set(Calendar.HOUR_OF_DAY, 15);        calendar.set(Calendar.MINUTE, 57);        calendar.set(Calendar.SECOND, 0);        Date date = calendar.getTime();        if (date.before(new Date())) {            date = this.addDay(date, 15);        }        Timer timer = new Timer();        NFDFlightDataTimerTask task = new NFDFlightDataTimerTask(startUrl);        timer.schedule(task, date, PERIOD_DAY);    }    public Date addDay(Date date, int num) {        Calendar startDT = Calendar.getInstance();        startDT.setTime(date);        // 设置上次执行时间        startDT.add(Calendar.MINUTE, num);        return startDT.getTime();    }}

核心代码就上面那部分，测试的时候，直接main方法

new TimerManager();即可