补充两个有用的关于时间的函数

/*
Time Functions.
cnmuse@chinaren.com
*/

import java.lang.*;
import java.util.*;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;

public class formatDateTime{
  static String TimeFormat1="yyyy.MM.dd HH:mm:ss";
  public formatDateTime(){
  }

/*
Function name:    lTimeCompare
Description:      Compare two times
Input:            String CompTime1,String CompTime2 (Format: yyyy.MM.dd HH:mm:ss)
Output:           time diffrent by seconds
*/
  public long lTimeCompare(String CompTime1,String CompTime2){
      long iReturn=-1;
      SimpleDateFormat sdf = new SimpleDateFormat(TimeFormat1);
      Date DateTime1=sdf.parse(CompTime1,new ParsePosition(0));
      Date DateTime2=sdf.parse(CompTime2,new ParsePosition(0));
      iReturn=DateTime2.getTime()/1000L-DateTime1.getTime()/1000L;
      return iReturn;  
  }

/*
Function name:    lTimeCompareNow
Description:      Compare one time with now
Input:            String CompTime1(Format: yyyy.MM.dd HH:mm:ss)
Output:           time diffrent by seconds
*/
  public long lTimeCompareNow(String CompTime1){
      long iReturn=-1;
      SimpleDateFormat sdf = new SimpleDateFormat(TimeFormat1);
      Date DateTime1=sdf.parse(CompTime1,new ParsePosition(0));
      iReturn=java.lang.System.currentTimeMillis()/1000L-DateTime1.getTime()/1000L;
      return iReturn;  
  }
}

原文转自：http://www.ltesting.net