java 时间比较

import java.text.*;
import java.util.*;

public static void main(String arg[])
{
   String date = "";   
   SimpleDateFormat  sdf=  new   SimpleDateFormat("yyyy-MM-dd");   
   java.util.Date   dd     =   Calendar.getInstance().getTime();   
	    date = sdf.format(dd);
	   System.out.println(date);
    boolean flag = isDateBefore(date+" 09:01:00");
	  System.out.println(flag);
}

public static boolean isDateBefore(String date2)
{
      try{
	Date date1 = new Date();
	DateFormat df = DateFormat.getDateTimeInstance();
	System.out.println(date1.before(df.parse(date2)));
	return date1.before(df.parse(date2)); 
	}catch(ParseException e){
	System.out.print(e.getMessage());
	return false;
	}
	}
}

public static boolean isDateAfter(String date2){
	try{
		Date date1 = new Date();
		DateFormat df = DateFormat.getDateTimeInstance();
		System.out.println(date1.after(df.parse(date2)));
		return date1.after(df.parse(date2)); 
	}catch(ParseException e){
		System.out.print(e.getMessage());
		return false;
	}
}

上下班时间可以通过这个时间来比较是否迟到或早退

评论

3 楼 pouyang 2012-08-28  

                SimpleDateFormat sdf = new SimpleDateFormat("HH24mm");
		String[] temp = "1200-2100".split("-");
		Date date = new Date();
		String time = sdf.format(date);
		System.out.println("--------------------"+temp[0]);
		System.out.println("--------------------"+temp[1]);
		System.out.println("--------------------"+time);
		int start = temp[0].compareTo(time);
		int end = temp[1].compareTo(time);
		
		if (start > 0 || end < 0) {
			System.out.println("----------非服务时间---------");
		}

能否这样做？

2 楼 xjjaid13 2011-08-10  

thank you

1 楼 nopain_nogain 2010-01-23  

OK,thank you so much.