计算任意2个日期内的工作日
package com.archie2010.test;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
 * 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 = "2010-12-1";
  String strDateEnd = "2010-12-14";
  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) {
  }
  }
  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);