自己用Java编写的时间获取类,目前应用在数据交换监控系统中,经测试可以正常使用。
提供以下功能:
Time tt = new Time();
System.out.println("获取昨天日期:" + tt.getyd());
System.out.println("获取当天日期:" + tt.getNowTime("yyyy-MM-dd"));
System.out.println("获取本周一日期:" + tt.getMondayOFWeek());
System.out.println("获取本周日的日期:" + tt.getCurrentWeekday());
System.out.println("获取上周一日期:" + tt.getPreviousWeekday(-1));////----------
System.out.println("获取上周日日期:" + tt.getPreviousWeekSunday(-1));///-------------
System.out.println("获取本月第一天日期:" + tt.getFirstDayOfMonth());
System.out.println("获取本月最后一天日期:" + tt.getDefaultDay());
System.out.println("获取上月第一天日期:" + tt.getPreviousMonthFirst(-1));///------------
System.out.println("获取上月最后一天的日期:" + tt.getPreviousMonthEnd(-1));///---------
System.out.println("前一个小时"+tt.getFixedHour(-1));
System.out.println("前五分钟"+tt.getFixedMinute(-5));
System.out.println("前20秒"+tt.getFixedSecond(-20));
System.out.println("两个日期相差多少天"+tt.daysBetween("2015-07-08","2015-07-10"));
System.out.println(" 计算指定日期的前后几天"+tt.getFixedDayfromDay("2015-07-08",1));
import java.text.Format; import java.text.ParseException; import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; public class Time { public static void main(String[] args) throws ParseException { Time tt = new Time(); System.out.println("获取昨天日期:" + tt.getyd()); System.out.println("获取当天日期:" + tt.getNowTime("yyyy-MM-dd")); System.out.println("获取本周一日期:" + tt.getMondayOFWeek()); System.out.println("获取本周日的日期:" + tt.getCurrentWeekday()); System.out.println("获取上周一日期:" + tt.getPreviousWeekday(-1));////---------- System.out.println("获取上周日日期:" + tt.getPreviousWeekSunday(-1));///------------- System.out.println("获取本月第一天日期:" + tt.getFirstDayOfMonth()); System.out.println("获取本月最后一天日期:" + tt.getDefaultDay()); System.out.println("获取上月第一天日期:" + tt.getPreviousMonthFirst(-1));///------------ System.out.println("获取上月最后一天的日期:" + tt.getPreviousMonthEnd(-1));///--------- System.out.println("前一个小时"+tt.getFixedHour(-1)); System.out.println("前五分钟"+tt.getFixedMinute(-5)); System.out.println("前20秒"+tt.getFixedSecond(-20)); System.out.println("两个日期相差多少天"+tt.daysBetween("2015-07-08","2015-07-10")); System.out.println(" 计算指定日期的前后几天"+tt.getFixedDayfromDay("2015-07-08",1)); } /** * 计算两个日期相差多少天 * @param smdate * 起始日期 yyyy-MM-dd * @param bdate * 截止日期 yyyy-MM-dd * @return */ public int daysBetween(String smdate,String bdate) { SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd"); Calendar cal = Calendar.getInstance(); try { cal.setTime(sdf.parse(smdate)); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } long time1 = cal.getTimeInMillis(); try { cal.setTime(sdf.parse(bdate)); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } long time2 = cal.getTimeInMillis(); long between_days=(time2-time1)/(1000*3600*24); return Integer.parseInt(String.valueOf(between_days)); } /** * 获取sdate这一天是星期几 * @param sdate * @return */ public String getWeek(String sdate) { Date date = strToDate(sdate); Calendar c = Calendar.getInstance(); c.setTime(date); return new SimpleDateFormat("EEEE").format(c.getTime()); } public Date strToDate(String strDate) { SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); ParsePosition pos = new ParsePosition(0); Date strtodate = formatter.parse(strDate, pos); return strtodate; } /** * 获取date1与date2之间天数的差值 * 当date1在前时,差值为负;当date2在前时,差值为正 * @param date1 * @param date2 * @return */ public long getDays(String date1, String date2) { if ((date1 == null) || (date1.equals(""))) { return 0L; } if ((date2 == null) || (date2.equals(""))) { return 0L; } SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd"); Date date = null; Date mydate = null; try { date = myFormatter.parse(date1); mydate = myFormatter.parse(date2); } catch (Exception localException) { } long day = (date.getTime() - mydate.getTime()) / 86400000L; return day; } /** * 获取昨天日期 * @return */ public String getyd() { Calendar cal = Calendar.getInstance(); cal.add(5, -1); String yesterday = new SimpleDateFormat("yyyy-MM-dd ").format(cal.getTime()); return yesterday; } /** * 获取本月最后一天日期 * @return */ public String getDefaultDay() { String str = ""; SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar lastDate = Calendar.getInstance(); lastDate.set(5, 1); lastDate.add(2, 1); lastDate.add(5, -1); str = sdf.format(lastDate.getTime()); return str; } /** * 获取前n月第一天日期,n为负数 * @return */ public String getPreviousMonthFirst(int n) { String str = ""; SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar lastDate = Calendar.getInstance(); lastDate.set(5, 1); lastDate.add(Calendar.MONTH, n); str = sdf.format(lastDate.getTime()); return str; } /** * "获取本月第一天日期 * @return */ public String getFirstDayOfMonth() { String str = ""; SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar lastDate = Calendar.getInstance(); lastDate.set(5, 1); str = sdf.format(lastDate.getTime()); return str; } /** *获取本周日的日期 * @return */ public String getCurrentWeekday() { int weeks = 0; int mondayPlus = getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(5, mondayPlus + 6); Date monday = currentDate.getTime(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); String preMonday = sdf.format(monday); return preMonday; } /** * 获取当天日期 * @param dateformat * @return */ public String getNowTime(String dateformat) { Date now = new Date(); SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat); String hehe = dateFormat.format(now); return hehe; } private int getMondayPlus() { Calendar cd = Calendar.getInstance(); int dayOfWeek = cd.get(7) - 1; if (dayOfWeek == 1) { return 0; } return (1 - dayOfWeek); } /** * 获取本周一日期 * @return */ public String getMondayOFWeek() { int weeks = 0; int mondayPlus = getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(5, mondayPlus); Date monday = currentDate.getTime(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); String preMonday = sdf.format(monday); return preMonday; } /** * 获取前n周周日日期,n为负数 * @return */ public String getPreviousWeekSunday(int n) { int weeks = n; int mondayPlus = getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(5, mondayPlus + weeks); Date monday = currentDate.getTime(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); String preMonday = sdf.format(monday); return preMonday; } /** * 获取前n周周一的日期,n为负数 * @return */ public String getPreviousWeekday(int n) { int weeks=n; int mondayPlus = getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(5, mondayPlus + 7 * weeks); Date monday = currentDate.getTime(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); String preMonday = sdf.format(monday); return preMonday; } /** * 获取前n月最后一天的日期,n为负数 * @return */ public String getPreviousMonthEnd(int n) { String str = ""; SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar lastDate = Calendar.getInstance(); lastDate.add(2, n); lastDate.set(5, 1); lastDate.roll(5, -1); str = sdf.format(lastDate.getTime()); return str; } /** * 获取当前日期的前dayCount天的日期 * @param dayCount * @return * yyyy-MM-dd */ public String getFixedDay(int dayCount) { Format f = new SimpleDateFormat("yyyy-MM-dd"); Calendar c = Calendar.getInstance(); // c = day(c, dayCount); c.add(Calendar.DATE, dayCount); return f.format(c.getTime()); } /** * 计算指定日期的前后几天 * @param day * yyyy-MM-dd * @param count * @return * yyyy-MM-dd * @throws ParseException */ public String getFixedDayfromDay(String day,int count) throws ParseException { SimpleDateFormat sdf=new SimpleDateFormat( "yyyy-MM-dd"); Date dt = sdf.parse(day ,new ParsePosition(0)); Calendar rightNow = Calendar.getInstance(); rightNow.setTime(dt); rightNow.add(Calendar.DATE,count);//你要加减的日期 Date dt1=rightNow.getTime(); String reStr=sdf.format(dt1); return reStr; } /** * 获取当前时间的前、后hourCount(小时)的时间 * @param hourCount * @return */ public String getFixedHour(int hourCount) { Format f = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Calendar c = Calendar.getInstance(); // c = day(c, dayCount); c.add(Calendar.HOUR, hourCount); return f.format(c.getTime()); } /** * 获取当前时间的前、后minuteCount(分钟)的时间 * @param minuteCount * @return */ public String getFixedMinute(int minuteCount) { Format f = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Calendar c = Calendar.getInstance(); // c = day(c, dayCount); c.add(Calendar.MINUTE, minuteCount); return f.format(c.getTime()); } /** * 获取当前时间的前、后secondCount(秒)的时间 * @param secondCount * @return */ public String getFixedSecond(int secondCount) { Format f = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Calendar c = Calendar.getInstance(); // c = day(c, dayCount); c.add(Calendar.SECOND, secondCount); return f.format(c.getTime()); } }