信手拈来 妙手偶得

import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class TimeUtil {
 private TimeUtil() {

 }
 
 public static String getCurrDateTime() {
  Date date = new Date();
  Format formatter = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss");
  return formatter.format(date);
 }

 public static String getCurrDate() {
  Date date = new Date();
  Format formatter = new SimpleDateFormat("yyyy.MM.dd");
  return formatter.format(date);
 }
 
 public static String getSimpleCurrDate() {
  Date date = new Date();
  Format formatter = new SimpleDateFormat("yyyy.M.d");
  return formatter.format(date);
 }

 public static String getCurrTime() {
  Date date = new Date();
  Format formatter = new SimpleDateFormat(".HH.mm.ss");
  return formatter.format(date);
 }

 public static String getCurrMonth() {
  Date date = new Date();
  Format formatter = new SimpleDateFormat("yyyy.M");
  return formatter.format(date);
 }

 public static Date getDate(String strMonth) {
  SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy.MM.dd");

  try {
   java.util.Date date = myFormatter.parse(strMonth);
   return date;
  } catch (Exception ex) {
   return null;
  }
 }

 public static long getDaysBetween(String startDate,String endDate){
  Date dStart=getDate(startDate);  
  Date dEnd=getDate(endDate);
  
  return (dEnd.getTime()-dStart.getTime())/(24 * 60 * 60 * 1000);
 }
 
 public static void main(String[] args){
  System.out.println(getDaysBetween("2008.06.05","2008.06.08"));
  System.out.println(getDaysBetween("2008.05.01","2008.06.01"));
  System.out.println(getDaysBetween("2007.01.01","2008.01.01"));
 }
}