获得每月的最后一天日期

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class LastDay
{

public static void main(String args[]) throws ParseException
{
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
System.out.println(getLastDayOfMonth("2012-02-21"));
}

public static String getLastDayOfMonth(String sDate1) throws ParseException
{
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar cDay1 = Calendar.getInstance();
cDay1.setTime(sdf.parse(sDate1));
final int lastDay = cDay1.getActualMaximum(Calendar.DAY_OF_MONTH);
Date lastDate = cDay1.getTime();
lastDate.setDate(lastDay);
return sdf.format(lastDate);
}

}