一个操作时间的类 博客分类: java CC++C#SQL
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2024-03-16 08:08:58
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package com.lhcard.common; /** * <p>Title: 时间格式转化与计算</p> */ import java.util.Calendar; import java.util.Date; import java.text.*; public class DateTime { public DateTime() { } /** * 取得系统当前时间 * @return String yyyy-mm-dd */ public static String getCurrentDate() { Calendar rightNow = Calendar.getInstance(); int year = rightNow.get(rightNow.YEAR); int month = rightNow.get(rightNow.MONTH) + 1; int day = rightNow.get(rightNow.DATE); return year + "-" + month + "-" + day; } /** * 取得系统当前时间 * @return String yyyy年mm月dd日 */ public static String getCurrentDate1() { Calendar rightNow = Calendar.getInstance(); int year = rightNow.get(rightNow.YEAR); int month = rightNow.get(rightNow.MONTH) + 1; int day = rightNow.get(rightNow.DATE); return year + "年" + month + "月" + day + "日"; } /** * 取得系统当前时间 * @return String yyyymmdd */ public static String getCurrentDate2() { Calendar rightNow = Calendar.getInstance(); int year = rightNow.get(rightNow.YEAR); int month = rightNow.get(rightNow.MONTH) + 1; int day = rightNow.get(rightNow.DATE); return year + "" + month + "" + day; } /** * 取得系统当前时间 * @return String yyyy-mm */ public static String getCurrentDate3() { Calendar rightNow = Calendar.getInstance(); int year = rightNow.get(rightNow.YEAR); int month = rightNow.get(rightNow.MONTH) + 1; //int day = rightNow.get(rightNow.DATE); return year + "-" + month; } /** * 取得系统当前时间 * @return String yyyyMMddhhmmss */ public static String getCurrentDate4() { Calendar c = Calendar.getInstance(); c.add(c.SECOND, 0); return "" + c.get(c.YEAR) + "" + (c.get(c.MONTH) + 1) + "" + c.get(c.DATE)+""+c.get(c.HOUR_OF_DAY)+""+c.get(c.MINUTE)+""+c.get(c.SECOND); } /** * 取得系统当前时间 * @return String yyyy-MM-dd hh:mm:ss */ /* public String getCurrentDate5() { SimpleDateFormat simpleDateFormat =new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); java.util.Date date = new java.util.Date(); String time = simpleDateFormat.format(date); return time; } */ /** * 取得系统当前时间 * @return String yyyy-MM-dd hh:mm:ss */ public static String getCurrentDate5(){ Calendar c = Calendar.getInstance(); c.add(c.SECOND, 0); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE)+" "+c.get(c.HOUR_OF_DAY)+":"+c.get(c.MINUTE)+":"+c.get(c.SECOND); } /** * 取得系统当前时间 常用于订单号 * @return String yyyyMMddhhmmss */ public static String getCurrentDate6() { Calendar c = Calendar.getInstance(); c.add(c.SECOND, 0); String year=c.get(c.YEAR)+""; return "" + year.subSequence(2,year.length())+ "" + (c.get(c.MONTH) + 1) + "" + c.get(c.DATE)+"-"+c.get(c.HOUR_OF_DAY)+""+c.get(c.MINUTE)+""+c.get(c.SECOND)+"-"+c.get(c.MILLISECOND); } //YYYYMMDD public static String getCurrentDate7() { Calendar c = Calendar.getInstance(); c.add(c.SECOND, 0); String year=c.get(c.YEAR)+""; int month=c.get(c.MONTH) + 1; String strmonth=month+""; if(month<10){ strmonth="0"+month; } int day=c.get(c.DATE); String strday=day+""; if(day<10){ strday="0"+day; } return "" + year+ "" + strmonth + "" + strday; } //hhmmsswww public static String getCurrentDate8() { Calendar c = Calendar.getInstance(); c.add(c.SECOND, 0); int hh=c.get(c.HOUR_OF_DAY); String strhh=hh+""; if(hh<10){ strhh="0"+hh; } int mm=c.get(c.MINUTE); String strmm=mm+""; if(mm<10){ strmm="0"+mm; } int ss=c.get(c.SECOND); String strss=ss+""; if(ss<10){ strss="0"+ss; } int www=c.get(c.MILLISECOND); String strwww=www+""; if(www<10){ strwww="00"+www; }if(9<www&&www<100){ strwww="0"+www; } return strhh+""+strmm+""+strss+""+strwww; } /** * 取得系统当前时间前n个月的相对应的一天 * @param n int * @return String yyyy-mm-dd */ public static String getNMonthBeforeCurrentDay(int n) { Calendar c = Calendar.getInstance(); c.add(c.MONTH, -n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } /** * 取得系统当前时间后n个月的相对应的一天 * @param n int * @return String yyyy-mm-dd */ public static String getNMonthAfterCurrentDay(int n) { Calendar c = Calendar.getInstance(); c.add(c.MONTH, n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } /** * 取得系统当前时间前n天 * @param n int * @return String yyyy-mm-dd */ public static String getNDayBeforeCurrentDate(int n) { Calendar c = Calendar.getInstance(); c.add(c.DAY_OF_MONTH, -n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } /** * 取得系统当前时间后n天 * @param n int * @return String yyyy-mm-dd */ public static String getNDayAfterCurrentDate(int n) { Calendar c = Calendar.getInstance(); c.add(c.DAY_OF_MONTH, n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } public String getNDayAfterCurrentDate1(int n) { Calendar c = Calendar.getInstance(); c.add(c.DAY_OF_MONTH, n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE)+" "+c.get(c.HOUR_OF_DAY)+":"+c.get(c.MINUTE)+":"+c.get(c.SECOND); } //--------------------------------------------------------------------- //取过去一个时间对应的系统当年的一天 public static String getCurrentDateAfterPastDate(String sPastDate) { if (sPastDate != null && !sPastDate.equals("")) { Date date = switchStringToDate(sPastDate); Calendar c = Calendar.getInstance(); c.setTime(date); int iPastYear = c.get(c.YEAR); Calendar c1 = Calendar.getInstance(); int iCurrentYear = c1.get(c1.YEAR); c.add(c.YEAR, iCurrentYear - iPastYear); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } else { return null; } } /** * 将一个日期字符串转化成日期 * @param sDate String * @return Date yyyy-mm-dd */ public static Date switchStringToDate(String sDate) { Date date = null; try { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); date = df.parse(sDate); } catch (Exception e) { System.out.println("日期转换失败:" + e.getMessage()); } return date; } /** * 输入两个字符串型的日期,比较两者的大小 * @param fromDate String * @param toDate String * @return boolean before为true */ public static boolean compareTwoDateBigOrSmall(String fromDate, String toDate) { Date dateFrom = switchStringToDate(fromDate); Date dateTo = switchStringToDate(toDate); if (dateFrom.before(dateTo)) { return true; } else { return false; } } /** * 将一个日期字符串转化成Calendar * @param sDate String * @return Calendar */ public static Calendar switchStringToCalendar(String sDate) { Date date = switchStringToDate(sDate); Calendar c = Calendar.getInstance(); c.setTime(date); return c; } /** * 将一个日期转化成Calendar * @param date Date * @return Calendar */ public static Calendar switchStringToCalendar(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return c; } public static String string2Date(String dateString) throws java.lang.Exception { /*DateFormat dateFormat; dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss"); dateFormat.setLenient(false); java.util.Date timeDate = dateFormat.parse(dateString);//util类型 //java.sql.Date dateTime = new java.sql.Date(timeDate.getTime());//sql类型 java.sql.Timestamp dateTime = new java.sql.Timestamp(timeDate.getTime());//Timestamp类型 */ SimpleDateFormat newk = new SimpleDateFormat ("yyyy.MM.dd hh:mm:ss"); SimpleDateFormat old = new SimpleDateFormat("MMM dd hh:mm:ss yyyy"); String strDate = "Mar 22 00:42:00 2002"; Date d = old.parse(strDate); System.out.println(newk.format(d)); return newk.format(d); } /** * 取得某个时间前n个月的相对应的一天 * @param sDate String * @param n int * @return String yyyy-mm-dd */ public static String getNMonthBeforeOneDay(String sDate, int n) { Calendar c = switchStringToCalendar(sDate); c.add(c.MONTH, -n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } //取得某个时间后n个月的相对应的一天 public static String getNMonthAfterOneDay(String sDate, int n) { Calendar c = switchStringToCalendar(sDate); c.add(c.MONTH, n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } //取得某个时间前n天,格式为yyyy-mm-dd public static String getNDayBeforeOneDate(String sDate, int n) { Calendar c = switchStringToCalendar(sDate); c.add(c.DAY_OF_MONTH, -n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } //取得某个时间后n天,格式为yyyy-mm-dd public static String getNDayAfterOneDate(String sDate, int n) { Calendar c = switchStringToCalendar(sDate); c.add(c.DAY_OF_MONTH, n); return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE); } //判断系统当前时间是不是润年 public static boolean isRunNian() { java.util.Calendar rightNow = java.util.Calendar.getInstance(); int year = rightNow.get(rightNow.YEAR); if (0 == year % 4 && (year % 100 != 0 || year % 400 == 0)) { return true; } else { return false; } } public static void main(String args[]) { DateTime a = new DateTime(); try{ //System.out.println(a.getNDayAfterCurrentDate(1)); // System.out.println(a.getNDayAfterCurrentDate(0)); // System.out.println(a.compareTwoDateBigOrSmall("2005-12-27 11:01:45.0","2005-12-10 13:16:58.0")); System.out.println(a.switchStringToDate("2007-1-5")); }catch(Exception e){System.err.println();} } }
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