package com.date.utlit;

import java.text.simpledateformat;
import java.util.calendar;
import java.util.date;
import java.util.gregoriancalendar;
/**
 * 计算任意2个日期内的工作日（没有考虑到国定假日）
 * @author user
 *
 */
public class datecal {

 /**
  * @param args
  */
 public static void main(string[] args) {
  try {

   string strdatestart = "2006-10-1";
   string strdateend = "2006-10-14";
   simpledateformat sdf = new simpledateformat("yyyy-mm-dd");
   date date_start = sdf.parse(strdatestart);
   date date_end = sdf.parse(strdateend);
   datecal app = new datecal();
   calendar cal_start = calendar.getinstance();
   calendar cal_end = calendar.getinstance();
   cal_start.settime(date_start);
   cal_end.settime(date_end);
   system.out.println("星期-->" + app.getchineseweek(cal_start)
     + " 日期-->" + cal_start.get(calendar.year) + "-"
     + (cal_start.get(calendar.month) + 1) + "-"
     + cal_start.get(calendar.day_of_month));
   system.out.println("星期-->" + app.getchineseweek(cal_end) + " 日期-->"
     + cal_end.get(calendar.year) + "-"
     + (cal_end.get(calendar.month) + 1) + "-"
     + cal_end.get(calendar.day_of_month));
   system.out.println("工作日为-->"
     + app.getworkingday(cal_start, cal_end));
   system.out.println("休息日-->"+app.getholidays(cal_start, cal_end));
  } catch (exception e) {
   // todo: handle exception
  }
 }

 public int getdaysbetween(java.util.calendar d1, java.util.calendar d2) {
  if (d1.after(d2)) { // swap dates so that d1 is start and d2 is end
   java.util.calendar swap = d1;
   d1 = d2;
   d2 = swap;
  }
  int days = d2.get(java.util.calendar.day_of_year)
    - d1.get(java.util.calendar.day_of_year);
  int y2 = d2.get(java.util.calendar.year);
  if (d1.get(java.util.calendar.year) != y2) {
   d1 = (java.util.calendar) d1.clone();
   do {
    days += d1.getactualmaximum(java.util.calendar.day_of_year);
    d1.add(java.util.calendar.year, 1);
   } while (d1.get(java.util.calendar.year) != y2);
  }
  return days;
 }

 /**
  * 计算2个日期之间的相隔天数
  * @param d1
  * @param d2
  * @return
  */
 public int getworkingday(java.util.calendar d1, java.util.calendar d2) {
  int result = -1;
  if (d1.after(d2)) { // swap dates so that d1 is start and d2 is end
   java.util.calendar swap = d1;
   d1 = d2;
   d2 = swap;
  }

  int betweendays = getdaysbetween(d1, d2);

  
  int charge_date = 0;
  int charge_start_date = 0;//开始日期的日期偏移量
  int charge_end_date = 0;//结束日期的日期偏移量
   // 日期不在同一个日期内
   int stmp;
   int etmp;
   stmp = 7 - d1.get(calendar.day_of_week);
   etmp = 7 - d2.get(calendar.day_of_week);
   if (stmp != 0 && stmp != 6) {// 开始日期为星期六和星期日时偏移量为0
    charge_start_date = stmp - 1;
   }
   if (etmp != 0 && etmp != 6) {// 结束日期为星期六和星期日时偏移量为0
    charge_end_date = etmp - 1;
   }
//  }
  result = (getdaysbetween(this.getnextmonday(d1), this.getnextmonday(d2)) / 7)
    * 5 + charge_start_date - charge_end_date;
  //system.out.println("charge_start_date>" + charge_start_date);
  //system.out.println("charge_end_date>" + charge_end_date);
  //system.out.println("between day is-->" + betweendays);
  return result;
 }

 public string getchineseweek(calendar date) {
  final string daynames[] = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五",
    "星期六" };

  int dayofweek = date.get(calendar.day_of_week);

  // system.out.println(daynames[dayofweek - 1]);
  return daynames[dayofweek - 1];

 }

 /**
  * 获得日期的下一个星期一的日期
  *
  * @param date
  * @return
  */
 public calendar getnextmonday(calendar date) {
  calendar result = null;
  result = date;
  do {
   result = (calendar) result.clone();
   result.add(calendar.date, 1);
  } while (result.get(calendar.day_of_week) != 2);
  return result;
 }
 
 /**
  *
  * @param d1
  * @param d2
  * @return
  */
 public int getholidays(calendar d1,calendar d2){
  return this.getdaysbetween(d1, d2)-this.getworkingday(d1, d2);
  
 }

}