Java日期时间操作代码示例大全，java日期示例大全,/**日期类* @ver
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Java日期时间操作代码示例大全，java日期示例大全,/**日期类* @ver
/**日期类* @version 1.0*/import java.util.*;import java.text.*;import java.util.Calendar;public class VeDate {/*** 获取现在时间** @return 返回时间类型 yyyy-MM-dd HH:mm:ss*/public static Date getNowDate() {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);String dateString = formatter.format(currentTime);ParsePosition pos = new ParsePosition(8);Date currentTime_2 = formatter.parse(dateString, pos);return currentTime_2;} /*** 获取现在时间** @return返回短时间格式 yyyy-MM-dd*/public static Date getNowDateShort() {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd”);String dateString = formatter.format(currentTime);ParsePosition pos = new ParsePosition(8);Date currentTime_2 = formatter.parse(dateString, pos);return currentTime_2;} /*** 获取现在时间** @return返回字符串格式 yyyy-MM-dd HH:mm:ss*/public static String getStringDate() {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);String dateString = formatter.format(currentTime);return dateString;} /*** 获取现在时间** @return 返回短时间字符串格式yyyy-MM-dd*/public static String getStringDateShort() {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd”);String dateString = formatter.format(currentTime);return dateString;} /*** 获取时间 小时:分;秒 HH:mm:ss** @return*/public static String getTimeShort() {SimpleDateFormat formatter = new SimpleDateFormat(“HH:mm:ss”);Date currentTime = new Date();String dateString = formatter.format(currentTime);return dateString;} /*** 将长时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss** @param strDate* @return*/public static Date strToDateLong(String strDate) {SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);ParsePosition pos = new ParsePosition(0);Date strtodate = formatter.parse(strDate, pos);return strtodate;} /*** 将长时间格式时间转换为字符串 yyyy-MM-dd HH:mm:ss** @param dateDate* @return*/public static String dateToStrLong(java.util.Date dateDate) {SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);String dateString = formatter.format(dateDate);return dateString;} /*** 将短时间格式时间转换为字符串 yyyy-MM-dd** @param dateDate* @param k* @return*/public static String dateToStr(java.util.Date dateDate) {SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd”);String dateString = formatter.format(dateDate);return dateString;} /*** 将短时间格式字符串转换为时间 yyyy-MM-dd** @param strDate* @return*/public static Date strToDate(String strDate) {SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd”);ParsePosition pos = new ParsePosition(0);Date strtodate = formatter.parse(strDate, pos);return strtodate;} /*** 得到现在时间** @return*/public static Date getNow() {Date currentTime = new Date();return currentTime;} /*** 提取一个月中的最后一天** @param day* @return*/public static Date getLastDate(long day) {Date date = new Date();long date_3_hm = date.getTime() – 3600000 * 34 * day;Date date_3_hm_date = new Date(date_3_hm);return date_3_hm_date;} /*** 得到现在时间** @return 字符串 yyyyMMdd HHmmss*/public static String getStringToday() {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(“yyyyMMdd HHmmss”);String dateString = formatter.format(currentTime);return dateString;} /*** 得到现在小时*/public static String getHour() {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);String dateString = formatter.format(currentTime);String hour;hour = dateString.substring(11, 13);return hour;} /*** 得到现在分钟** @return*/public static String getTime() {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);String dateString = formatter.format(currentTime);String min;min = dateString.substring(14, 16);return min;} /*** 根据用户传入的时间表示格式，返回当前时间的格式 如果是yyyyMMdd，注意字母y不能大写。** @param sformat* yyyyMMddhhmmss* @return*/public static String getUserDate(String sformat) {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(sformat);String dateString = formatter.format(currentTime);return dateString;} /*** 二个小时时间间的差值,必须保证二个时间都是”HH:MM”的格式，返回字符型的分钟*/public static String getTwoHour(String st1, String st2) {String[] kk = null;String[] jj = null;kk = st1.split(“:”);jj = st2.split(“:”);if (Integer.parseInt(kk[0]) < Integer.parseInt(jj[0]))return “0″;else {double y = Double.parseDouble(kk[0]) + Double.parseDouble(kk[1]) / 60;double u = Double.parseDouble(jj[0]) + Double.parseDouble(jj[1]) / 60;if ((y – u) > 0)return y – u + “”;elsereturn “0″;}} /*** 得到二个日期间的间隔天数*/public static String getTwoDay(String sj1, String sj2) {SimpleDateFormat myFormatter = new SimpleDateFormat(“yyyy-MM-dd”);long day = 0;try {java.util.Date date = myFormatter.parse(sj1);java.util.Date mydate = myFormatter.parse(sj2);day = (date.getTime() – mydate.getTime()) / (24 * 60 * 60 * 1000);} catch (Exception e) {return “”;}return day + “”;} /*** 时间前推或后推分钟,其中JJ表示分钟.*/public static String getPreTime(String sj1, String jj) {SimpleDateFormat format = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);String mydate1 = “”;try {Date date1 = format.parse(sj1);long Time = (date1.getTime() / 1000) + Integer.parseInt(jj) * 60;date1.setTime(Time * 1000);mydate1 = format.format(date1);} catch (Exception e) {}return mydate1;} /*** 得到一个时间延后或前移几天的时间,nowdate为时间,delay为前移或后延的天数*/public static String getNextDay(String nowdate, String delay) {try{SimpleDateFormat format = new SimpleDateFormat(“yyyy-MM-dd”);String mdate = “”;Date d = strToDate(nowdate);long myTime = (d.getTime() / 1000) + Integer.parseInt(delay) * 24 * 60 * 60;d.setTime(myTime * 1000);mdate = format.format(d);return mdate;}catch(Exception e){return “”;}} /*** 判断是否润年** @param ddate* @return*/public static boolean isLeapYear(String ddate) { /*** 详细设计： 1.被400整除是闰年，否则： 2.不能被4整除则不是闰年 3.能被4整除同时不能被100整除则是闰年* 3.能被4整除同时能被100整除则不是闰年*/Date d = strToDate(ddate);GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();gc.setTime(d);int year = gc.get(Calendar.YEAR);if ((year % 400) == 0)return true;else if ((year % 4) == 0) {if ((year % 100) == 0)return false;elsereturn true;} elsereturn false;} /*** 返回美国时间格式 26 Apr 2006** @param str* @return*/public static String getEDate(String str) {SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd”);ParsePosition pos = new ParsePosition(0);Date strtodate = formatter.parse(str, pos);String j = strtodate.toString();String[] k = j.split(” “);return k[2] + k[1].toUpperCase() + k[5].substring(2, 4);} /*** 获取一个月的最后一天** @param dat* @return*/public static String getEndDateOfMonth(String dat) {// yyyy-MM-ddString str = dat.substring(0, 8);String month = dat.substring(5, 7);int mon = Integer.parseInt(month);if (mon == 1 || mon == 3 || mon == 5 || mon == 7 || mon == 8 || mon == 10 || mon == 12) {str += “31″;} else if (mon == 4 || mon == 6 || mon == 9 || mon == 11) {str += “30″;} else {if (isLeapYear(dat)) {str += “29″;} else {str += “28″;}}return str;} /*** 判断二个时间是否在同一个周** @param date1* @param date2* @return*/public static boolean isSameWeekDates(Date date1, Date date2) {Calendar cal1 = Calendar.getInstance();Calendar cal2 = Calendar.getInstance();cal1.setTime(date1);cal2.setTime(date2);int subYear = cal1.get(Calendar.YEAR) – cal2.get(Calendar.YEAR);if (0 == subYear) {if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR))return true;} else if (1 == subYear && 11 == cal2.get(Calendar.MONTH)) {// 如果12月的最后一周横跨来年第一周的话则最后一周即算做来年的第一周if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR))return true;} else if (-1 == subYear && 11 == cal1.get(Calendar.MONTH)) {if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR))return true;}return false;} /*** 产生周序列,即得到当前时间所在的年度是第几周** @return*/public static String getSeqWeek() {Calendar c = Calendar.getInstance(Locale.CHINA);String week = Integer.toString(c.get(Calendar.WEEK_OF_YEAR));if (week.length() == 1)week = “0″ + week;String year = Integer.toString(c.get(Calendar.YEAR));return year + week;} /*** 获得一个日期所在的周的星期几的日期，如要找出2002年2月3日所在周的星期一是几号** @param sdate* @param num* @return*/public static String getWeek(String sdate, String num) {// 再转换为时间Date dd = VeDate.strToDate(sdate);Calendar c = Calendar.getInstance();c.setTime(dd);if (num.equals(“1″)) // 返回星期一所在的日期c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);else if (num.equals(“2″)) // 返回星期二所在的日期c.set(Calendar.DAY_OF_WEEK, Calendar.TUESDAY);else if (num.equals(“3″)) // 返回星期三所在的日期c.set(Calendar.DAY_OF_WEEK, Calendar.WEDNESDAY);else if (num.equals(“4″)) // 返回星期四所在的日期c.set(Calendar.DAY_OF_WEEK, Calendar.THURSDAY);else if (num.equals(“5″)) // 返回星期五所在的日期c.set(Calendar.DAY_OF_WEEK, Calendar.FRIDAY);else if (num.equals(“6″)) // 返回星期六所在的日期c.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);else if (num.equals(“0″)) // 返回星期日所在的日期c.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);return new SimpleDateFormat(“yyyy-MM-dd”).format(c.getTime());} /*** 根据一个日期，返回是星期几的字符串** @param sdate* @return*/public static String getWeek(String sdate) {// 再转换为时间Date date = VeDate.strToDate(sdate);Calendar c = Calendar.getInstance();c.setTime(date);// int hour=c.get(Calendar.DAY_OF_WEEK);// hour中存的就是星期几了，其范围 1~7// 1=星期日 7=星期六，其他类推return new SimpleDateFormat(“EEEE”).format(c.getTime());}public static String getWeekStr(String sdate){String str = “”;str = VeDate.getWeek(sdate);if(“1″.equals(str)){str = “星期日”;}else if(“2″.equals(str)){str = “星期一”;}else if(“3″.equals(str)){str = “星期二”;}else if(“4″.equals(str)){str = “星期三”;}else if(“5″.equals(str)){str = “星期四”;}else if(“6″.equals(str)){str = “星期五”;}else if(“7″.equals(str)){str = “星期六”;}return str;} /*** 两个时间之间的天数** @param date1* @param date2* @return*/public static long getDays(String date1, String date2) {if (date1 == null || date1.equals(“”))return 0;if (date2 == null || date2.equals(“”))return 0;// 转换为标准时间SimpleDateFormat myFormatter = new SimpleDateFormat(“yyyy-MM-dd”);java.util.Date date = null;java.util.Date mydate = null;try {date = myFormatter.parse(date1);mydate = myFormatter.parse(date2);} catch (Exception e) {}long day = (date.getTime() – mydate.getTime()) / (24 * 60 * 60 * 1000);return day;} /*** 形成如下的日历 ， 根据传入的一个时间返回一个结构 星期日 星期一 星期二 星期三 星期四 星期五 星期六 下面是当月的各个时间* 此函数返回该日历第一行星期日所在的日期** @param sdate* @return*/public static String getNowMonth(String sdate) {// 取该时间所在月的一号sdate = sdate.substring(0, 8) + “01″; // 得到这个月的1号是星期几Date date = VeDate.strToDate(sdate);Calendar c = Calendar.getInstance();c.setTime(date);int u = c.get(Calendar.DAY_OF_WEEK);String newday = VeDate.getNextDay(sdate, (1 – u) + “”);return newday;} /*** 取得数据库主键 生成格式为yyyymmddhhmmss+k位随机数** @param k* 表示是取几位随机数，可以自己定*/ public static String getNo(int k) { return getUserDate(“yyyyMMddhhmmss”) + getRandom(k);} /*** 返回一个随机数** @param i* @return*/public static String getRandom(int i) {Random jjj = new Random();// int suiJiShu = jjj.nextInt(9);if (i == 0)return “”;String jj = “”;for (int k = 0; k < i; k++) {jj = jj + jjj.nextInt(9);}return jj;} /**** @param args*/public static boolean RightDate(String date) { SimpleDateFormat sdf = new SimpleDateFormat(“yyyy-MM-dd hh:mm:ss”);;if (date == null)return false;if (date.length() > 10) {sdf = new SimpleDateFormat(“yyyy-MM-dd hh:mm:ss”);} else {sdf = new SimpleDateFormat(“yyyy-MM-dd”);}try {sdf.parse(date);} catch (ParseException pe) {return false;}return true;} /**************************************************************************** //nd=1表示返回的值中包含年度 //yf=1表示返回的值中包含月份 //rq=1表示返回的值中包含日期 //format表示返回的格式 1* 以年月日中文返回 2 以横线-返回 // 3 以斜线/返回 4 以缩写不带其它符号形式返回 // 5 以点号.返回**************************************************************************/public static String getStringDateMonth(String sdate, String nd, String yf, String rq, String format) {Date currentTime = new Date();SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd”);String dateString = formatter.format(currentTime);String s_nd = dateString.substring(0, 4); // 年份String s_yf = dateString.substring(5, 7); // 月份String s_rq = dateString.substring(8, 10); // 日期String sreturn = “”;roc.util.MyChar mc = new roc.util.MyChar();if (sdate == null || sdate.equals(“”) || !mc.Isdate(sdate)) { // 处理空值情况if (nd.equals(“1″)) {sreturn = s_nd;// 处理间隔符if (format.equals(“1″))sreturn = sreturn + “年”;else if (format.equals(“2″))sreturn = sreturn + “-”;else if (format.equals(“3″))sreturn = sreturn + “/”;else if (format.equals(“5″))sreturn = sreturn + “.”;}// 处理月份if (yf.equals(“1″)) {sreturn = sreturn + s_yf;if (format.equals(“1″))sreturn = sreturn + “月”;else if (format.equals(“2″))sreturn = sreturn + “-”;else if (format.equals(“3″))sreturn = sreturn + “/”;else if (format.equals(“5″))sreturn = sreturn + “.”;}// 处理日期if (rq.equals(“1″)) {sreturn = sreturn + s_rq;if (format.equals(“1″))sreturn = sreturn + “日”;}} else {// 不是空值，也是一个合法的日期值，则先将其转换为标准的时间格式sdate = roc.util.RocDate.getOKDate(sdate);s_nd = sdate.substring(0, 4); // 年份s_yf = sdate.substring(5, 7); // 月份s_rq = sdate.substring(8, 10); // 日期if (nd.equals(“1″)) {sreturn = s_nd;// 处理间隔符if (format.equals(“1″))sreturn = sreturn + “年”;else if (format.equals(“2″))sreturn = sreturn + “-”;else if (format.equals(“3″))sreturn = sreturn + “/”;else if (format.equals(“5″))sreturn = sreturn + “.”;}// 处理月份if (yf.equals(“1″)) {sreturn = sreturn + s_yf;if (format.equals(“1″))sreturn = sreturn + “月”;else if (format.equals(“2″))sreturn = sreturn + “-”;else if (format.equals(“3″))sreturn = sreturn + “/”;else if (format.equals(“5″))sreturn = sreturn + “.”;}// 处理日期if (rq.equals(“1″)) {sreturn = sreturn + s_rq;if (format.equals(“1″))sreturn = sreturn + “日”;}}return sreturn;} public static String getNextMonthDay(String sdate, int m) {sdate = getOKDate(sdate);int year = Integer.parseInt(sdate.substring(0, 4));int month = Integer.parseInt(sdate.substring(5, 7));month = month + m;if (month < 0) {month = month + 12;year = year – 1;} else if (month > 12) {month = month – 12;year = year + 1;}String smonth = “”;if (month < 10)smonth = “0″ + month;elsesmonth = “” + month;return year + “-” + smonth + “-10″;} public static String getOKDate(String sdate) {if (sdate == null || sdate.equals(“”))return getStringDateShort(); if (!VeStr.Isdate(sdate)) {sdate = getStringDateShort();}// 将“/”转换为“-”sdate = VeStr.Replace(sdate, “/”, “-”);// 如果只有8位长度，则要进行转换if (sdate.length() == 8)sdate = sdate.substring(0, 4) + “-” + sdate.substring(4, 6) + “-” + sdate.substring(6, 8);SimpleDateFormat formatter = new SimpleDateFormat(“yyyy-MM-dd”);ParsePosition pos = new ParsePosition(0);Date strtodate = formatter.parse(sdate, pos);String dateString = formatter.format(strtodate);return dateString;} public static void main(String[] args) throws Exception {try {//System.out.print(Integer.valueOf(getTwoDay(“2006-11-03 12:22:10″, “2006-11-02 11:22:09″)));} catch (Exception e) {throw new Exception();}//System.out.println(“sss”);}}
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