工作日计算 去掉周末

随便写了个class，比较啰嗦，可以用

/*
 *@(#)WorkDay.java 
 *Copyright (c) 2007-2008
 *All right reserved
 */
package time;

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



/**
 *Class description goes here
 * 
 *@author Bug Liu
 *@version ewms 2.0
 *@time 2011-7-6
 *@description
 */
public class WorkDay {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println(getDay("2011-07-01","2011-07-01"));
	}
	/**
	 * 
	 * @param time1 开始时间
	 * @param time2结束时间
	 * @return
	 */
	public static int getDay(String time1, String time2) {
		int day = 0;
		if(time1==time2){
			if(!ifWeek(time1)){
				day = 0;
			}else{
				day = 1 ;
			}
		}else{
			String nexttime = getNextDatetostring(time1);
			while(!CompareToDate(nexttime,time2)){
				if(!ifWeek(nexttime)){
					day++;
				}
				nexttime = getNextDatetostring(nexttime);
			}
		}
		return day;
	}
	/**
	 * 是否周末
	 * @param str
	 * @return
	 */
	public static boolean ifWeek(String str){
		if(getWeekOfDay(str)==6||getWeekOfDay(str)==7){
			return true;
		}else{
			return false ;
		}
	}
	/**
	 * 计算星期几 
	 * @param str
	 * @return
	 */
	public static int getWeekOfDay(String str) {

		String[] arr = str.split("-");
		Calendar cal = Calendar.getInstance();
		cal.set(Integer.parseInt(arr[0]), Integer.parseInt(arr[1]) - 1, Integer
				.parseInt(arr[2]));
		return cal.get(Calendar.DAY_OF_WEEK);
	}
	/**
	 * @return 系统给定日期的下一天
	 */
	public static String getNextDatetostring(String date) {
		java.util.Date now = getDateByString(date);
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		String xtsj = sdf.format(dateAdd(now,1,0));
        return xtsj;
	}
	/**
	 * 返回给定的日期在指定时间段后的日期，指定con为0时为天，1-月，2-年
	 * Description
	 * 
	 * @param d 日期
	 * @param x 给定数目
	 * @param con	给定操作
	 * @return
	 */
	public static Date dateAdd(Date date, int x, int con) {
		
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		
		if (con == 0){
			
			int d = cal.get(Calendar.DAY_OF_MONTH); 
            d = d + x;
            cal.set(Calendar.DAY_OF_MONTH, d);      
 		}
		if (con == 1){
			int m= cal.get(Calendar.MONTH);
			m= m+x;
			cal.set(Calendar.MONTH, m);
		}
		if (con == 2){
			int y = cal.get(Calendar.YEAR);
			y = y +x;
			cal.set(Calendar.YEAR, y);
		}
		return cal.getTime();
	}
	/**
	 * 根据给定的字符串生成日期,字符串的格式为yyyy-mm-dd
	 * Description
	 * 
	 * @param str
	 * @return
	 */
	public static Date getDateByString(String str) {
		
		String[] arr = str.split("-");
		Calendar cal = Calendar.getInstance();
		cal.set(Integer.parseInt(arr[0]), Integer
				.parseInt(arr[1]) - 1, Integer.parseInt(arr[2]));
		return cal.getTime();
	}
	/**@description 比较日期大小
	 * 
	 * @param date_1
	 * @param date_2
	 * @return 前面日期大，返回true
	 */
	public static boolean CompareToDate(String date_1,String date_2){
		boolean temp = false ;
        int result = date_1.compareTo(date_2);
        if (result > 0) {
            temp =  true;
        }else{
        	temp = false;
        }
		return temp ;
	}
}