java 相关日期处理类

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• ?? 发表时间：2007-03-14??<?>?猎头职位:?北京:?ITeye网站诚聘Java高级搜索工程师相关文章:??
  • JAVA各种时间类型的取得
  • Calendar常用方法封装
  • Java获取各种常用时间方法
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    /*
    ?* 创建日期 2007-03-14
    ?*
    ?* 功能? 取日期时间工具
    ?*
    ?*/
    package com.util;

    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.Calendar;
    import java.util.GregorianCalendar;

    /**
    * 说明:????? 取日期时间工具

    
    *
    * @author?? 好学蜘蛛
    * @author???haoxueweb@163.com
    * @version? 1.0
    * Company???http://freehost04.websamba.com/dudu178
    */
    public class DateUtil {

    ?public DateUtil(){}
    ?/**
    ???? * @see???? 取得当前日期（格式为：yyyy-MM-dd）
    ???? * @return?String
    ???? */
    ??? public String GetDate()
    ??? {
    ??????? SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    ??????? String sDate = sdf.format(new Date());
    ??????? return sDate;
    ??? }

    ??? /**
    ???? * @see???? 取得当前时间（格式为：yyy-MM-dd HH:mm:ss）
    ???? * @return?String
    ???? */
    ??? public static String GetDateTime()
    ??? {
    ??????? SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    ??????? String sDate = sdf.format(new Date());
    ??????? return sDate;
    ??? }

    ??? /**
    ???? * @see???? 按指定格式取得当前时间()
    ???? * @return?String
    ???? */
    ??? public String GetTimeFormat(String strFormat)
    ??? {
    ??????? SimpleDateFormat sdf = new SimpleDateFormat(strFormat);
    ??????? String sDate = sdf.format(new Date());
    ??????? return sDate;
    ??? }

    ??? /**
    ???? * @see???? 取得指定时间的给定格式()
    ???? * @return?String
    ???? * @throws ParseException
    ???? */
    ??? public String SetDateFormat(String myDate,String strFormat) throws ParseException
    ??? {

    ??????? SimpleDateFormat sdf = new SimpleDateFormat(strFormat);
    ??????? String sDate = sdf.format(sdf.parse(myDate));

    ??????? return sDate;
    ??? }

    ??? public String FormatDateTime(String strDateTime, String strFormat)
    ??? {
    ??????? String sDateTime = strDateTime;
    ??????? try {
    ??????????? Calendar Cal = parseDateTime(strDateTime);
    ??????????? SimpleDateFormat sdf = null;
    ??????????? sdf = new SimpleDateFormat(strFormat);
    ??????????? sDateTime = sdf.format(Cal.getTime());
    ??????? } catch (Exception e) {

    ??????? }
    ??????? return sDateTime;
    ??? }

    ??? public static Calendar parseDateTime(String baseDate)
    ??? {
    ??????? Calendar cal = null;
    ??????? cal = new GregorianCalendar();
    ??????? int yy = Integer.parseInt(baseDate.substring(0, 4));
    ??????? int mm = Integer.parseInt(baseDate.substring(5, 7)) - 1;
    ??????? int dd = Integer.parseInt(baseDate.substring(8, 10));
    ??????? int hh = 0;
    ??????? int mi = 0;
    ??????? int ss = 0;
    ??????? if(baseDate.length() > 12)
    ??????? {
    ??????????? hh = Integer.parseInt(baseDate.substring(11, 13));
    ??????????? mi = Integer.parseInt(baseDate.substring(14, 16));
    ??????????? ss = Integer.parseInt(baseDate.substring(17, 19));
    ??????? }
    ??????? cal.set(yy, mm, dd, hh, mi, ss);
    ??????? return cal;
    ??? }
    ??? public int getDay(String strDate)
    ??? {
    ??????? Calendar cal = parseDateTime(strDate);
    ??????? return? cal.get(Calendar.DATE);
    ??? }

    ??? public int getMonth(String strDate)
    ??? {
    ??????? Calendar cal = parseDateTime(strDate);

    ??????? return cal.get(Calendar.MONTH) + 1;
    ??? }

    ??? public int getWeekDay(String strDate)
    ??? {
    ??????? Calendar cal = parseDateTime(strDate);
    ??????? return cal.get(Calendar.DAY_OF_WEEK);
    ??? }

    ??? public String getWeekDayName(String strDate)
    ??? {
    ??????? String mName[] = {
    ??????????? "日", "一", "二", "三", "四", "五", "六"
    ??????? };
    ??????? int iWeek = getWeekDay(strDate);
    ??????? iWeek = iWeek - 1;
    ??????? return "星期" + mName[iWeek];
    ??? }

    ??? public int getYear(String strDate)
    ??? {
    ??????? Calendar cal = parseDateTime(strDate);
    ??????? return cal.get(Calendar.YEAR) + 1900;
    ??? }

    ??? public String DateAdd(String strDate, int iCount, int iType)
    ??? {
    ??????? Calendar Cal = parseDateTime(strDate);
    ??????? int pType = 0;
    ??????? if(iType == 0)
    ??????? {
    ??????????? pType = 1;
    ??????? } else
    ??????? if(iType == 1)
    ??????? {
    ??????????? pType = 2;
    ??????? } else
    ??????? if(iType == 2)
    ??????? {
    ??????????? pType = 5;
    ??????? } else
    ??????? if(iType == 3)
    ??????? {
    ??????????? pType = 10;
    ??????? } else
    ??????? if(iType == 4)
    ??????? {
    ??????????? pType = 12;
    ??????? } else
    ??????? if(iType == 5)
    ??????? {
    ??????????? pType = 13;
    ??????? }
    ??????? Cal.add(pType, iCount);
    ??????? SimpleDateFormat sdf = null;
    ??????? if(iType <= 2)
    ??????????? sdf = new SimpleDateFormat("yyyy-MM-dd");
    ??????? else
    ??????????? sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    ??????? String sDate = sdf.format(Cal.getTime());
    ??????? return sDate;
    ??? }

    ??? public String DateAdd(String strOption, int iDays, String strStartDate)
    ??? {
    ??????? if(!strOption.equals("d"));
    ??????? return strStartDate;
    ??? }

    ??? public int DateDiff(String strDateBegin, String strDateEnd, int iType)
    ??? {
    ??????? Calendar calBegin = parseDateTime(strDateBegin);
    ??????? Calendar calEnd = parseDateTime(strDateEnd);
    ??????? long lBegin = calBegin.getTimeInMillis();
    ??????? long lEnd = calEnd.getTimeInMillis();
    ??????? int ss = (int)((lBegin - lEnd) / 1000L);
    ??????? int min = ss / 60;
    ??????? int hour = min / 60;
    ??????? int day = hour / 24;
    ??????? if(iType == 0)
    ??????????? return hour;
    ??????? if(iType == 1)
    ??????????? return min;
    ??????? if(iType == 2)
    ??????????? return day;
    ??????? else
    ??????????? return -1;
    ??? }
    ????
    ??? /*****************************************
    ???? * @功能???? 判断某年是否为闰年
    ???? * @return? boolean
    ???? * @throws ParseException
    ???? ****************************************/
    ??? public boolean isLeapYear(int yearNum){
    ??? ?boolean isLeep = false;
    ??????? /**判断是否为闰年，赋值给一标识符flag*/
    ??????? if((yearNum % 4 == 0) && (yearNum % 100 != 0)){
    ??????? ?isLeep = true;
    ??????? }? else if(yearNum % 400 ==0){
    ??????? ?isLeep = true;
    ??????? } else {
    ??????? ?isLeep = false;
    ??????? }
    ??????? return isLeep;
    ??? }

    ????
    ???? /*****************************************
    ???? * @功能???? 计算当前日期某年的第几周
    ???? * @return? interger
    ???? * @throws ParseException
    ???? ****************************************/
    ??? public int getWeekNumOfYear(){
    ??? ?Calendar calendar = Calendar.getInstance();
    ??? ?int iWeekNum = calendar.get(Calendar.WEEK_OF_YEAR);
    ??? ?return iWeekNum;
    ??? }

    ??? /*****************************************
    ???? * @功能???? 计算指定日期某年的第几周
    ???? * @return? interger
    ???? * @throws ParseException
    ???? ****************************************/
    ??? public int getWeekNumOfYearDay(String strDate ) throws ParseException{
    ??? ?Calendar calendar = Calendar.getInstance();
    ??? ?SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    ??? ?Date curDate = format.parse(strDate);
    ??? ?calendar.setTime(curDate);
    ??? ?int iWeekNum = calendar.get(Calendar.WEEK_OF_YEAR);
    ??? ?return iWeekNum;
    ??? }
    ??? /*****************************************
    ???? * @功能???? 计算某年某周的开始日期
    ???? * @return? interger
    ???? * @throws ParseException
    ???? ****************************************/
    ??? public String getYearWeekFirstDay(int yearNum,int weekNum) throws ParseException {
    ??? ?
    ??? ?Calendar cal = Calendar.getInstance();
    ??? ?cal.set(Calendar.YEAR, yearNum);
    ??? ?cal.set(Calendar.WEEK_OF_YEAR, weekNum);
    ??? ?cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
    ??? ?//分别取得当前日期的年、月、日
    ??? ?String tempYear = Integer.toString(yearNum);
    ??? ?String tempMonth = Integer.toString(cal.get(Calendar.MONTH) + 1);
    ??? ?String tempDay = Integer.toString(cal.get(Calendar.DATE));
    ??? ?String tempDate = tempYear + "-" +tempMonth + "-" + tempDay;
    ??? ?return SetDateFormat(tempDate,"yyyy-MM-dd");

    
    ??? ?
    ??? }
    ??? /*****************************************
    ???? * @功能???? 计算某年某周的结束日期
    ???? * @return? interger
    ???? * @throws ParseException
    ???? ****************************************/
    ??? public String getYearWeekEndDay(int yearNum,int weekNum) throws ParseException {
    ??? ?Calendar cal = Calendar.getInstance();
    ??? ?cal.set(Calendar.YEAR, yearNum);
    ??? ?cal.set(Calendar.WEEK_OF_YEAR, weekNum + 1);
    ??? ?cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
    ??????? //分别取得当前日期的年、月、日
    ??? ?String tempYear = Integer.toString(yearNum);
    ??? ?String tempMonth = Integer.toString(cal.get(Calendar.MONTH) + 1);
    ??? ?String tempDay = Integer.toString(cal.get(Calendar.DATE));
    ??? ?String tempDate = tempYear + "-" +tempMonth + "-" + tempDay;
    ??? ?return SetDateFormat(tempDate,"yyyy-MM-dd");
    ??? }
    ????
    ????
    ??? /*****************************************
    ???? * @功能???? 计算某年某月的开始日期
    ???? * @return? interger
    ???? * @throws ParseException
    ???? ****************************************/
    ??? public String getYearMonthFirstDay(int yearNum,int monthNum) throws ParseException {
    ??? ?
    ??? ?//分别取得当前日期的年、月、日
    ??? ?String tempYear = Integer.toString(yearNum);
    ??? ?String tempMonth = Integer.toString(monthNum);
    ??? ?String tempDay = "1";
    ??? ?String tempDate = tempYear + "-" +tempMonth + "-" + tempDay;
    ??? ?return SetDateFormat(tempDate,"yyyy-MM-dd");
    ??? ?
    ??? }
    ??? /*****************************************
    ???? * @功能???? 计算某年某月的结束日期
    ???? * @return? interger
    ???? * @throws ParseException
    ???? ****************************************/
    ??? public String getYearMonthEndDay(int yearNum,int monthNum) throws ParseException {

    ?????? //分别取得当前日期的年、月、日
    ??? ?String tempYear = Integer.toString(yearNum);
    ??? ?String tempMonth = Integer.toString(monthNum);
    ??? ?String tempDay = "31";
    ??? ?if (tempMonth.equals("1") || tempMonth.equals("3") || tempMonth.equals("5") || tempMonth.equals("7") ||tempMonth.equals("8") || tempMonth.equals("10") ||tempMonth.equals("12")) {
    ??? ??tempDay = "31";
    ??? ?}
    ??? ?if (tempMonth.equals("4") || tempMonth.equals("6") || tempMonth.equals("9")||tempMonth.equals("11")) {
    ??? ??tempDay = "30";
    ??? ?}
    ??? ?if (tempMonth.equals("2")) {
    ??? ??if (isLeapYear(yearNum)) {
    ??? ???tempDay = "29";
    ??? ??} else {
    ??? ???? tempDay = "28";
    ??? ??}
    ??? ?}
    ??? ?//System.out.println("tempDay:" + tempDay);
    ??? ?String tempDate = tempYear + "-" +tempMonth + "-" + tempDay;
    ??? ?return SetDateFormat(tempDate,"yyyy-MM-dd");

    ??? }

    }