计算任意2个日期内的工作日（没有考虑到国定假日）
//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）
*/
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);
? ?Calendar cal_start = Calendar.getInstance();
? ?Calendar cal_end = Calendar.getInstance();
? ?cal_start.setTime(date_start);
? ?cal_end.setTime(date_end);
? ?DateCal app = new DateCal();
? ?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(); //////为什么要用到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; //注意算法
//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(); //可能是在while中需要保持值的不变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);
}
}