Java获取各种常用时间方法
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Java获取各种常用时间方法
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本人之前做的項目中積累常用的時間方法，貼出來與大家共享，如果哪里有錯誤或更有效的方法請盡管拍磚！哈哈?
Java代碼??package?com.hefeng.test;?? ?? ?? import?java.text.DateFormat;?? import?java.text.ParsePosition;?? import?java.text.SimpleDateFormat;?? import?java.util.Calendar;?? import?java.util.Date;?? import?java.util.GregorianCalendar;?? ?? public?class?TimeTest?{?? ????//用來全局控制?上一周，本周，下一周的周數變化?? ????private??int?weeks?=?0;?? ????private?int?MaxDate;//一月最大天數?? ????private?int?MaxYear;//一年最大天數?? ?????? ?????? ????/**? ?????*?@param?args? ?????*/?? ????public?static?void?main(String[]?args)?{?? ????????TimeTest?tt?=?new?TimeTest();?? ????????System.out.println("獲取當天日期:"+tt.getNowTime("yyyy-MM-dd"));?? ????????System.out.println("獲取本周一日期:"+tt.getMondayOFWeek());?? ????????System.out.println("獲取本周日的日期~:"+tt.getCurrentWeekday());?? ????????System.out.println("獲取上周一日期:"+tt.getPreviousWeekday());?? ????????System.out.println("獲取上周日日期:"+tt.getPreviousWeekSunday());?? ????????System.out.println("獲取下周一日期:"+tt.getNextMonday());?? ????????System.out.println("獲取下周日日期:"+tt.getNextSunday());?? ????????System.out.println("獲得相應周的周六的日期:"+tt.getNowTime("yyyy-MM-dd"));?? ????????System.out.println("獲取本月第一天日期:"+tt.getFirstDayOfMonth());?? ????????System.out.println("獲取本月最后一天日期:"+tt.getDefaultDay());?? ????????System.out.println("獲取上月第一天日期:"+tt.getPreviousMonthFirst());?? ????????System.out.println("獲取上月最后一天的日期:"+tt.getPreviousMonthEnd());?? ????????System.out.println("獲取下月第一天日期:"+tt.getNextMonthFirst());?? ????????System.out.println("獲取下月最后一天日期:"+tt.getNextMonthEnd());?? ????????System.out.println("獲取本年的第一天日期:"+tt.getCurrentYearFirst());?? ????????System.out.println("獲取本年最后一天日期:"+tt.getCurrentYearEnd());?? ????????System.out.println("獲取去年的第一天日期:"+tt.getPreviousYearFirst());?? ????????System.out.println("獲取去年的最后一天日期:"+tt.getPreviousYearEnd());?? ????????System.out.println("獲取明年第一天日期:"+tt.getNextYearFirst());?? ????????System.out.println("獲取明年最后一天日期:"+tt.getNextYearEnd());?? ????????System.out.println("獲取本季度第一天到最后一天:"+tt.getThisSeasonTime(11));?? ????????System.out.println("獲取兩個日期之間間隔天數2008-12-1~2008-9.29:"+TimeTest.getTwoDay("2008-12-1","2008-9-29"));?? ????}?? ?????? ?????? ????/**? ????????*?得到二個日期間的間隔天數? ????????*/?? ????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?+?"";?? ????}?? ?? ?? ????/**? ????????*?根據一個日期，返回是星期幾的字符串? ????????*?? ????????*?@param?sdate? ????????*?@return? ????????*/?? ????public?static?String?getWeek(String?sdate)?{?? ????????//?再轉換為時間?? ????????Date?date?=?TimeTest.strToDate(sdate);?? ????????Calendar?c?=?Calendar.getInstance();?? ????????c.setTime(date);?? ????????//?int?hour=c.get(Calendar.DAY_OF_WEEK);?? ????????//?hour中存的就是星期幾了，其范圍?1~7?? ????????//?1=星期日?7=星期六，其他類推?? ????????return?new?SimpleDateFormat("EEEE").format(c.getTime());?? ????}?? ?? ????/**? ????????*?將短時間格式字符串轉換為時間?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;?? ????}?? ?? ????/**? ????????*?兩個時間之間的天數? ????????*?? ????????*?@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;?? ????????//?轉換為標準時間?? ????????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;?? ????}?? ?? ?? ?? ?????? ????//?計算當月最后一天,返回字符串?? ????public?String?getDefaultDay(){???? ???????String?str?=?"";?? ???????SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd");?????? ?? ???????Calendar?lastDate?=?Calendar.getInstance();?? ???????lastDate.set(Calendar.DATE,1);//設為當前月的1號?? ???????lastDate.add(Calendar.MONTH,1);//加一個月，變為下月的1號?? ???????lastDate.add(Calendar.DATE,-1);//減去一天，變為當月最后一天?? ????????? ???????str=sdf.format(lastDate.getTime());?? ???????return?str;???? ????}?? ?????? ????//?上月第一天?? ????public?String?getPreviousMonthFirst(){???? ???????String?str?=?"";?? ???????SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd");?????? ?? ???????Calendar?lastDate?=?Calendar.getInstance();?? ???????lastDate.set(Calendar.DATE,1);//設為當前月的1號?? ???????lastDate.add(Calendar.MONTH,-1);//減一個月，變為下月的1號?? ???????//lastDate.add(Calendar.DATE,-1);//減去一天，變為當月最后一天?? ????????? ???????str=sdf.format(lastDate.getTime());?? ???????return?str;???? ????}?? ?????? ????//獲取當月第一天?? ????public?String?getFirstDayOfMonth(){???? ???????String?str?=?"";?? ???????SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd");?????? ?? ???????Calendar?lastDate?=?Calendar.getInstance();?? ???????lastDate.set(Calendar.DATE,1);//設為當前月的1號?? ???????str=sdf.format(lastDate.getTime());?? ???????return?str;???? ????}?? ?????? ????//?獲得本周星期日的日期???? ????public?String?getCurrentWeekday()?{?? ????????weeks?=?0;?? ????????int?mondayPlus?=?this.getMondayPlus();?? ????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ????????currentDate.add(GregorianCalendar.DATE,?mondayPlus+6);?? ????????Date?monday?=?currentDate.getTime();?? ?????????? ????????DateFormat?df?=?DateFormat.getDateInstance();?? ????????String?preMonday?=?df.format(monday);?? ????????return?preMonday;?? ????}?? ?????? ?????? ????//獲取當天時間??? ????public?String?getNowTime(String?dateformat){?? ????????Date???now???=???new???Date();????? ????????SimpleDateFormat???dateFormat???=???new???SimpleDateFormat(dateformat);//可以方便地修改日期格式????? ????????String??hehe??=?dateFormat.format(now);????? ????????return?hehe;?? ????}?? ?????? ????//?獲得當前日期與本周日相差的天數?? ????private?int?getMondayPlus()?{?? ????????Calendar?cd?=?Calendar.getInstance();?? ????????//?獲得今天是一周的第幾天，星期日是第一天，星期二是第二天......?? ????????int?dayOfWeek?=?cd.get(Calendar.DAY_OF_WEEK)-1;?????????//因為按中國禮拜一作為第一天所以這里減1?? ????????if?(dayOfWeek?==?1)?{?? ????????????return?0;?? ????????}?else?{?? ????????????return?1?-?dayOfWeek;?? ????????}?? ????}?? ?????? ????//獲得本周一的日期?? ????public?String?getMondayOFWeek(){?? ?????????weeks?=?0;?? ?????????int?mondayPlus?=?this.getMondayPlus();?? ?????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ?????????currentDate.add(GregorianCalendar.DATE,?mondayPlus);?? ?????????Date?monday?=?currentDate.getTime();?? ??????????? ?????????DateFormat?df?=?DateFormat.getDateInstance();?? ?????????String?preMonday?=?df.format(monday);?? ?????????return?preMonday;?? ????}?? ?????? ??//獲得相應周的周六的日期?? ????public?String?getSaturday()?{?? ????????int?mondayPlus?=?this.getMondayPlus();?? ????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ????????currentDate.add(GregorianCalendar.DATE,?mondayPlus?+?7?*?weeks?+?6);?? ????????Date?monday?=?currentDate.getTime();?? ????????DateFormat?df?=?DateFormat.getDateInstance();?? ????????String?preMonday?=?df.format(monday);?? ????????return?preMonday;?? ????}?? ?????? ?//?獲得上周星期日的日期?? ????public?String?getPreviousWeekSunday()?{?? ????????weeks=0;?? ????????weeks--;?? ????????int?mondayPlus?=?this.getMondayPlus();?? ????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ????????currentDate.add(GregorianCalendar.DATE,?mondayPlus+weeks);?? ????????Date?monday?=?currentDate.getTime();?? ????????DateFormat?df?=?DateFormat.getDateInstance();?? ????????String?preMonday?=?df.format(monday);?? ????????return?preMonday;?? ????}?? ?? ?//?獲得上周星期一的日期?? ????public?String?getPreviousWeekday()?{?? ????????weeks--;?? ????????int?mondayPlus?=?this.getMondayPlus();?? ????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ????????currentDate.add(GregorianCalendar.DATE,?mondayPlus?+?7?*?weeks);?? ????????Date?monday?=?currentDate.getTime();?? ????????DateFormat?df?=?DateFormat.getDateInstance();?? ????????String?preMonday?=?df.format(monday);?? ????????return?preMonday;?? ????}?? ?????? ????//?獲得下周星期一的日期?? ????public?String?getNextMonday()?{?? ????????weeks++;?? ????????int?mondayPlus?=?this.getMondayPlus();?? ????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ????????currentDate.add(GregorianCalendar.DATE,?mondayPlus?+?7);?? ????????Date?monday?=?currentDate.getTime();?? ????????DateFormat?df?=?DateFormat.getDateInstance();?? ????????String?preMonday?=?df.format(monday);?? ????????return?preMonday;?? ????}?? ?????? ?//?獲得下周星期日的日期?? ????public?String?getNextSunday()?{?? ?????????? ????????int?mondayPlus?=?this.getMondayPlus();?? ????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ????????currentDate.add(GregorianCalendar.DATE,?mondayPlus?+?7+6);?? ????????Date?monday?=?currentDate.getTime();?? ????????DateFormat?df?=?DateFormat.getDateInstance();?? ????????String?preMonday?=?df.format(monday);?? ????????return?preMonday;?? ????}?? ?????? ?????? ?????? ????private?int?getMonthPlus(){?? ????????Calendar?cd?=?Calendar.getInstance();?? ????????int?monthOfNumber?=?cd.get(Calendar.DAY_OF_MONTH);?? ????????cd.set(Calendar.DATE,?1);//把日期設置為當月第一天??? ????????cd.roll(Calendar.DATE,?-1);//日期回滾一天，也就是最后一天??? ????????MaxDate=cd.get(Calendar.DATE);??? ????????if(monthOfNumber?==?1){?? ????????????return?-MaxDate;?? ????????}else{?? ????????????return?1-monthOfNumber;?? ????????}?? ????}?? ?????? ??//獲得上月最后一天的日期?? ????public?String?getPreviousMonthEnd(){?? ????????String?str?=?"";?? ???????SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd");?????? ?? ???????Calendar?lastDate?=?Calendar.getInstance();?? ??????lastDate.add(Calendar.MONTH,-1);//減一個月?? ??????lastDate.set(Calendar.DATE,?1);//把日期設置為當月第一天??? ??????lastDate.roll(Calendar.DATE,?-1);//日期回滾一天，也就是本月最后一天??? ???????str=sdf.format(lastDate.getTime());?? ???????return?str;???? ????}?? ?????? ??//獲得下個月第一天的日期?? ????public?String?getNextMonthFirst(){?? ????????String?str?=?"";?? ???????SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd");?????? ?? ???????Calendar?lastDate?=?Calendar.getInstance();?? ??????lastDate.add(Calendar.MONTH,1);//減一個月?? ??????lastDate.set(Calendar.DATE,?1);//把日期設置為當月第一天??? ???????str=sdf.format(lastDate.getTime());?? ???????return?str;???? ????}?? ?????? ??//獲得下個月最后一天的日期?? ????public?String?getNextMonthEnd(){?? ????????String?str?=?"";?? ???????SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd");?????? ?? ???????Calendar?lastDate?=?Calendar.getInstance();?? ??????lastDate.add(Calendar.MONTH,1);//加一個月?? ??????lastDate.set(Calendar.DATE,?1);//把日期設置為當月第一天??? ??????lastDate.roll(Calendar.DATE,?-1);//日期回滾一天，也就是本月最后一天??? ???????str=sdf.format(lastDate.getTime());?? ???????return?str;???? ????}?? ?????? ????//獲得明年最后一天的日期?? ????public?String?getNextYearEnd(){?? ????????String?str?=?"";?? ???????SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd");?????? ?? ??????Calendar?lastDate?=?Calendar.getInstance();?? ??????lastDate.add(Calendar.YEAR,1);//加一個年?? ??????lastDate.set(Calendar.DAY_OF_YEAR,?1);?? ?????lastDate.roll(Calendar.DAY_OF_YEAR,?-1);?? ???????str=sdf.format(lastDate.getTime());?? ???????return?str;???? ????}?? ?????? ??//獲得明年第一天的日期?? ????public?String?getNextYearFirst(){?? ????????String?str?=?"";?? ???????SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd");?????? ?? ??????Calendar?lastDate?=?Calendar.getInstance();?? ??????lastDate.add(Calendar.YEAR,1);//加一個年?? ??????lastDate.set(Calendar.DAY_OF_YEAR,?1);?? ???????????str=sdf.format(lastDate.getTime());?? ??????return?str;???? ?????????? ????}?? ?????? ??//獲得本年有多少天?? ????private?int?getMaxYear(){?? ????????Calendar?cd?=?Calendar.getInstance();?? ????????cd.set(Calendar.DAY_OF_YEAR,1);//把日期設為當年第一天?? ????????cd.roll(Calendar.DAY_OF_YEAR,-1);//把日期回滾一天。?? ????????int?MaxYear?=?cd.get(Calendar.DAY_OF_YEAR);??? ????????return?MaxYear;?? ????}?? ?????? ????private?int?getYearPlus(){?? ????????Calendar?cd?=?Calendar.getInstance();?? ????????int?yearOfNumber?=?cd.get(Calendar.DAY_OF_YEAR);//獲得當天是一年中的第幾天?? ????????cd.set(Calendar.DAY_OF_YEAR,1);//把日期設為當年第一天?? ????????cd.roll(Calendar.DAY_OF_YEAR,-1);//把日期回滾一天。?? ????????int?MaxYear?=?cd.get(Calendar.DAY_OF_YEAR);?? ????????if(yearOfNumber?==?1){?? ????????????return?-MaxYear;?? ????????}else{?? ????????????return?1-yearOfNumber;?? ????????}?? ????}?? ??//獲得本年第一天的日期?? ????public?String?getCurrentYearFirst(){?? ????????int?yearPlus?=?this.getYearPlus();?? ????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ????????currentDate.add(GregorianCalendar.DATE,yearPlus);?? ????????Date?yearDay?=?currentDate.getTime();?? ????????DateFormat?df?=?DateFormat.getDateInstance();?? ????????String?preYearDay?=?df.format(yearDay);?? ????????return?preYearDay;?? ????}?? ?????? ?????? ??//獲得本年最后一天的日期?*?? ????public?String?getCurrentYearEnd(){?? ????????Date?date?=?new?Date();?? ????????SimpleDateFormat???dateFormat???=???new???SimpleDateFormat("yyyy");//可以方便地修改日期格式????? ????????String??years??=?dateFormat.format(date);????? ????????return?years+"-12-31";?? ????}?? ?????? ?????? ??//獲得上年第一天的日期?*?? ????public?String?getPreviousYearFirst(){?? ????????Date?date?=?new?Date();?? ????????SimpleDateFormat???dateFormat???=???new???SimpleDateFormat("yyyy");//可以方便地修改日期格式????? ????????String??years??=?dateFormat.format(date);?int?years_value?=?Integer.parseInt(years);???? ????????years_value--;?? ????????return?years_value+"-1-1";?? ????}?? ?????? ??//獲得上年最后一天的日期?? ????public?String?getPreviousYearEnd(){?? ????????weeks--;?? ????????int?yearPlus?=?this.getYearPlus();?? ????????GregorianCalendar?currentDate?=?new?GregorianCalendar();?? ????????currentDate.add(GregorianCalendar.DATE,yearPlus+MaxYear*weeks+(MaxYear-1));?? ????????Date?yearDay?=?currentDate.getTime();?? ????????DateFormat?df?=?DateFormat.getDateInstance();?? ????????String?preYearDay?=?df.format(yearDay);?? ????????getThisSeasonTime(11);?? ????????return?preYearDay;?? ????}?? ?????? ??//獲得本季度?? ????public?String?getThisSeasonTime(int?month){?? ????????int?array[][]?=?{{1,2,3},{4,5,6},{7,8,9},{10,11,12}};?? ????????int?season?=?1;?? ????????if(month>=1&&month<=3){?? ????????????season?=?1;?? ????????}?? ????????if(month>=4&&month<=6){?? ????????????season?=?2;?? ????????}?? ????????if(month>=7&&month<=9){?? ????????????season?=?3;?? ????????}?? ????????if(month>=10&&month<=12){?? ????????????season?=?4;?? ????????}?? ????????int?start_month?=?array[season-1][0];?? ????????int?end_month?=?array[season-1][2];?? ?????????? ????????Date?date?=?new?Date();?? ????????SimpleDateFormat???dateFormat???=???new???SimpleDateFormat("yyyy");//可以方便地修改日期格式????? ????????String??years??=?dateFormat.format(date);????? ????????int?years_value?=?Integer.parseInt(years);?? ?????????? ????????int?start_days?=1;//years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);?? ????????int?end_days?=?getLastDayOfMonth(years_value,end_month);?? ????????String?seasonDate?=?years_value+"-"+start_month+"-"+start_days+";"+years_value+"-"+end_month+"-"+end_days;?? ????????return?seasonDate;?? ?????????? ????}?? ?????? ????/**? ?????*?獲取某年某月的最后一天? ?????*?@param?year?年? ?????*?@param?month?月? ?????*?@return?最后一天? ?????*/?? ???private?int?getLastDayOfMonth(int?year,?int?month)?{?? ?????????if?(month?==?1?||?month?==?3?||?month?==?5?||?month?==?7?||?month?==?8?? ???????????????????||?month?==?10?||?month?==?12)?{?? ???????????????return?31;?? ?????????}?? ?????????if?(month?==?4?||?month?==?6?||?month?==?9?||?month?==?11)?{?? ???????????????return?30;?? ?????????}?? ?????????if?(month?==?2)?{?? ???????????????if?(isLeapYear(year))?{?? ???????????????????return?29;?? ???????????????}?else?{?? ???????????????????return?28;?? ???????????????}?? ?????????}?? ?????????return?0;?? ???}?? ???/**? ????*?是否閏年? ????*?@param?year?年? ????*?@return?? ????*/?? ??public?boolean?isLeapYear(int?year)?{?? ????????return?(year?%?4?==?0?&&?year?%?100?!=?0)?||?(year?%?400?==?0);?? ??}?? } ?
Java代碼??
轉載于:https://www.cnblogs.com/wangtianxj/archive/2011/08/15/2139456.html
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