TimerTask与Timer设计时间监控

今天接到一个新需求，在某个时间点，提前15分钟输出日志，然后提前10分钟再输出日志然后提前5分钟再输出日志。

想了想，决定用Java的TimerTask与Timer进行设计。本人也是第一次使用，所以写了个测试类，给大家分享：

第一个类：

package timertask.usable;


import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

/**
 * <Description functions in a word>
 * <Detail description>
 * 
 * @author  Cookie Xu
 * @version  [Version NO, 2013-6-28]
 * @see  [Related classes/methods]
 * @since  [product/Modul version]
 */
public class Test {
    Timer timer;
    public Test(Date date,String output) {
        timer = new Timer();
        RemindTask rt = new RemindTask();
        rt.setOutput(output);
        timer.schedule(rt, date);
        
    }
    class RemindTask extends TimerTask {
    private String output = "";
public void setOutput(String output) {
this.output = output;
}


public void run() {
    SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    System.out.println(output);
        System.out.println("Output Logs………………………… Time : "+dfs.format(new Date()));
        timer.cancel();
}
    }
    private static List<Date> getDateList() throws Exception {
    SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date date1 = dfs.parse("2013-06-28 16:57:18");
Date date2 = dfs.parse("2013-06-28 16:56:59");
Date date3 = dfs.parse("2013-06-28 16:56:43");
Date date4 = dfs.parse("2013-06-28 16:56:30");
List<Date> date = new ArrayList<Date>();
date.add(date1);
date.add(date2);
date.add(date3);
date.add(date4);
return date;
    }
public static void main(String[] args) throws Exception {
SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
List<Date> d = getDateList();
for(int i = 0;i < d.size();i++){
Date date = d.get(i);
List<Date> dateList = GetPointInTime.getPointInTime(date);
for (int j = 0; j < dateList.size(); j++) {
Date endDate = dateList.get(j);
int z = i + 1;
System.out.println("Need Output Logs Time："+ z +" ------" + dfs.format(endDate));
new Test(endDate,"第" + z + "个定时器：");
}
}
}
}

第二个类

package timertask.usable;


import java.text.ParseException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;


/**
 * <Description functions in a word>
 * <Detail description>
 * 
 * @author  Cookie Xu
 * @version  [Version NO, 2013-6-28]
 * @see  [Related classes/methods]
 * @since  [product/Modul version]
 */
public class GetPointInTime {
/** <Description functions in a word>
* <Detail description>根据参数，得到一段事件以前
* @param date 时间点
* @param judgeChange判断提前的位置
* @param changeNumber提前的计算
* @return
* @throws Exception [Parameters description]
* 
* @return Date [Return type description]
* @exception throws [Excetion] [Exception description]
* @see [Related classes#Related methods#Related properties]
*/
private static Date getFewAgo(Date date,String judgeChange,int changeNumber) throws Exception{
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
//得到年月日
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day = calendar.get(Calendar.DATE);
int hour = calendar.get(Calendar.HOUR_OF_DAY);
//得到分钟
int minutes = calendar.get(Calendar.MINUTE);
//得到秒
int seconds = calendar.get(Calendar.SECOND);
if(judgeChange.equals("minutes")){
minutes = minutes + changeNumber;
}else if(judgeChange.equals("seconds")){
seconds = seconds + changeNumber;
}
calendar.set(year, month, day, hour, minutes, seconds);
return calendar.getTime();
}

/** <Description functions in a word>
* <Detail description>得到时间点数组
* @param date
* @return
* @throws Exception [Parameters description]
* 
* @return List<Date> [Return type description]
* @exception throws [Excetion] [Exception description]
* @see [Related classes#Related methods#Related properties]
*/
public static List<Date> getPointInTime(Date date) throws Exception{
List<Date> dateList = new ArrayList<Date>();
Date changeDate1 = getFewAgo(date,"minutes",-1);
Date changeDate2 = getFewAgo(date,"seconds",-30);
Date changeDate3 = getFewAgo(date,"seconds",-10);
Date changeDate4 = getFewAgo(date,"seconds",-5);
Date changeDate5 = getFewAgo(date,"seconds",-2);
dateList.add(changeDate2);
dateList.add(changeDate3);
dateList.add(changeDate4);
dateList.add(changeDate5);
return dateList;
}


public static void main(String[] args) throws ParseException {



}
}