JAVA时间日期处理类实例

/**
* 
* 文 件 名: AccountDate.java
* 
* 创建时间: 2008-11-18
*
* Email : **@163.com
*/
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class AccountDate {
 private static transient int gregorianCutoverYear = 1582;
 /** 闰年中每月天数 */
 private static final int[] DAYS_P_MONTH_LY= {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
 /** 非闰年中每月天数 */
 private static final int[] DAYS_P_MONTH_CY= {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
 /** 代表数组里的年、月、日 */
 private static final int Y = 0, M = 1, D = 2;
 /**
 * 将代表日期的字符串分割为代表年月日的整形数组
 * @param date
 * @return
 */
 public static int[] splitYMD(String date){
  date = date.replace("-", "");
  int[] ymd = {0, 0, 0};
  ymd[Y] = Integer.parseInt(date.substring(0, 4));
  ymd[M] = Integer.parseInt(date.substring(4, 6));
  ymd[D] = Integer.parseInt(date.substring(6, 8));
  return ymd;
 }
 /**
 * 检查传入的参数代表的年份是否为闰年
 * @param year
 * @return
 */
 public static boolean isLeapYear(int year) {
  return year >= gregorianCutoverYear ?
   ((year%4 == 0) && ((year%100 != 0) || (year%400 == 0))) : (year%4 == 0); 
 }
 /**
 * 日期加1天
 * @param year
 * @param month
 * @param day
 * @return
 */
 private static int[] addOneDay(int year, int month, int day){
  if(isLeapYear( year )){
   day++;
   if( day > DAYS_P_MONTH_LY[month -1 ] ){
    month++;
    if(month > 12){
     year++;
     month = 1;
    }
    day = 1;
   }
  }else{
   day++;
   if( day > DAYS_P_MONTH_CY[month -1 ] ){
    month++;
    if(month > 12){
     year++;
     month = 1;
    }
    day = 1;
   }
  }
  int[] ymd = {year, month, day};
  return ymd;
 }
 /**
 * 将不足两位的月份或日期补足为两位
 * @param decimal
 * @return
 */
 public static String formatMonthDay(int decimal){
  DecimalFormat df = new DecimalFormat("00");
  return df.format( decimal );
 }
 /**
 * 将不足四位的年份补足为四位
 * @param decimal
 * @return
 */
 public static String formatYear(int decimal){
  DecimalFormat df = new DecimalFormat("0000");
  return df.format( decimal );
 }
 /**
 * 计算两个日期之间相隔的天数
 * @param begin
 * @param end
 * @return
 * @throws ParseException
 */
 public static long countDay(String begin,String end){
   SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
   Date beginDate , endDate;
   long day = 0;
   try {
   beginDate= format.parse(begin);
   endDate= format.parse(end);
   day=(endDate.getTime()-beginDate.getTime())/(24*60*60*1000); 
  } catch (ParseException e) {
   e.printStackTrace();
  }    
   return day;
 }
 /**
 * 以循环的方式计算日期
 * @param beginDate endDate
 * @param days
 * @return
 */
 public static List<String> getEveryday(String beginDate , String endDate){
  long days = countDay(beginDate, endDate);
  int[] ymd = splitYMD( beginDate );
  List<String> everyDays = new ArrayList<String>();
  everyDays.add(beginDate);
  for(int i = 0; i < days; i++){
   ymd = addOneDay(ymd[Y], ymd[M], ymd[D]);
   everyDays.add(formatYear(ymd[Y])+"-"+formatMonthDay(ymd[M])+"-"+formatMonthDay(ymd[D]));
  }
  return everyDays;
 }
 public static void main(String[] args) {
  List<String> list = AccountDate.getEveryday("2008-08-29", "2008-09-02");
  for (String result : list) {
   System.out.println(result);
  }
 }
}