java的时间操作

1、java的时间操作2008年02月01日 星期五 11:12/*日期类* date 2003-12-04* 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 SimpleDa

2、teFormat("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 =

3、 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*/pu

4、blic 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() Da

5、te 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

6、: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"

7、;);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

8、: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 = formatte

9、r.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);ret

10、urn 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_

11、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 st

12、atic 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

13、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* ret

14、urn*/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(St

15、ring st1, String st2) String kk = null;String jj = null;kk = st1.split(":");jj = st2.split(":");if (Integer.parseInt(kk0) < Integer.parseInt(jj0) return "0"else double y = Double.parseDouble(kk0) + Double.parseDouble(kk1) / 60; double u = Double.parseDouble(jj0) + Do

16、uble.parseDouble(jj1) / 60; if (y - u) > 0) return y - u + "" else return "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.p

17、arse(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 Si

18、mpleDateFormat("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,nowdat

19、e为时间,delay为前移或后延的天数*/public static String getNextDay(String nowdate, String delay) trySimpleDateFormat 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(my

20、Time * 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

21、 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; else return true; else return false;/* 返回美国时间格式 26 Apr 2006* param str* return*/public static String getEDate(St

22、ring 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 k2 + k1.toUpperCase() + k5.substring(2, 4);/* 获取一个月的最后一天* p

23、aram 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 | m

24、on = 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 ca

25、l2 = 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

26、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* re

27、turn*/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

28、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.equa

29、ls("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"

30、;) / 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")

31、.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 17/ 1=星期日 7=星期六，其他类推return new SimpleDa

32、teFormat("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&q

33、uot;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 lon

34、g 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 =

35、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 getNow

36、Month(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

37、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 &q

38、uot;"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 = n

39、ew 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 /

40、 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.substrin

41、g(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; /

42、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 (

43、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")

44、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.substrin

45、g(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 +

46、"/" 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(&quo