Java Time Tool Class (Project utility)

Package Com.eabax.plugin.yundada.utils;import Java.text.parseexception;import Java.text.simpledateformat;import Java.util.arraylist;import Java.util.calendar;import Java.util.date;import Java.util.gregoriancalendar;import Java.util.linkedhashmap;public class Timeutil {/** * resolves all months between a date * * @param begindatestr * @param enddatestr * @return */public static arraylist<string> getmonthlist (String begindatestr,string enddatestr) {// Specifies the time format to parse SimpleDateFormat f = new SimpleDateFormat ("yyyy-mm");//The month list returned by string sret = "";//define some variables date begindate = Null;d ate endDate = null; GregorianCalendar BEGINGC = null; GregorianCalendar ENDGC = null; arraylist<string> list = new arraylist<string> (); try {//String parse to date begindate = F.parse (BEGINDATESTR); EndDate = F.parse (ENDDATESTR);//Set Calendar BEGINGC = new GregorianCalendar (); Begingc.settime (begindate); ENDGC = new GregorianCalendar (); Endgc.settime (endDate);//until two time same while (Begingc.gettime (). CompareTo (Endgc.gettime ()) <= 0) {Sret = BEGINGC. Get (Calendar.year) + "-" + (Begingc.get (calendar.month) + 1); List.add (Sret);//month, increase time Begingc.add (Calendar.month, 1);} return list;} catch (Exception e) {e.printstacktrace (); return null;}} /** * Resolves all dates between a date period * * @param begindatestr * Start date * @param enddatestr * End Date * @return */public s Tatic arraylist<string> getdaylist (String begindatestr,string enddatestr) {//Specify the time format to resolve simpledateformat f = new SimpleDateFormat ("Yyyy-mm-dd");//define some variables Date begindate = null;date endDate = null; Calendar BEGINGC = null; Calendar ENDGC = null; arraylist<string> list = new arraylist<string> (); try {//String parse to date begindate = F.parse (BEGINDATESTR); EndDate = F.parse (ENDDATESTR);//Set Calendar BEGINGC = Calendar.getinstance (); Begingc.settime (begindate); ENDGC = Calendar.getinstance (); Endgc.settime (endDate); SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");//Until two times the same while (Begingc.gettime (). CompareTo ( Endgc.gettime ()) <= 0) {List.add (Sdf.format (Begingc.gettime ()));//Day, add time Begingc.add (Calendar.day_of_month, 1);} return list;} catch (Exception e) {e.printstacktrace (); return null;}} public static arraylist<integer> getyearlist () {arraylist<integer> list = new arraylist<integer> (); Calendar c = null;c = Calendar.getinstance (), C.settime (New Date ()), int curryear = Calendar.getinstance (). Get ( calendar.year); int startyear = Curryear-5;int Endyear = curryear + 10;for (int i = startyear; i < endyear; i++) {list . Add (new Integer (i));} return list;} public static int Getcurryear () {return calendar.getinstance (). get (Calendar.year);} /** * Get the total number of weeks in a year * * @param years * @return */public static Linkedhashmap<integer, string> getweeklist (int) {Lin Kedhashmap<integer, string> map = new Linkedhashmap<integer, string> (); Calendar C = new GregorianCalendar (); C.set (year, Calendar.december, D, N, D, d); int count = Getweekofyear (C.gettime ()) ; SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd"); String Dayofweekstart = ""; String dayofweekend = ""; for (int i = 1; I <= count; i++) {Dayofweekstart = Sdf.format (Getfirstdayofweek (year, i));d ayofweekend = Sdf.format (Getlastdayofweek (year, i)); Map.put (New Integer (i), "first" + i + "week (from" + Dayofweekstart + "to" + Dayofweekend + ")"); return map;} /** * Gets the total number of weeks in a year * * @param years * @return */public static int getweekcountinyear (int year) {Calendar c = new Gregoriancale Ndar (); C.set (year, Calendar.december, N, +, +); int count = Getweekofyear (C.gettime ()); return count;} /** * Gets the current date is how many weeks * * @param date * @return */public static int getweekofyear (date date) {Calendar c = new Gregoriancalend AR (); C.setfirstdayofweek (Calendar.monday); C.setminimaldaysinfirstweek (7); C.settime (date); return C.get ( Calendar.week_of_year);} /** * Get the first day of a certain week * * @param year * @param week * @return */public static Date getfirstdayofweek (int year, int week) {Cale Ndar C = new GregorianCalendar (); C.set (Calendar.year, year); C.set (Calendar.month, calendar.january); C.set ( Calendar.date, 1); Calendar Cal= (GregorianCalendar) c.clone (); Cal.add (Calendar.date, week * 7); return Getfirstdayofweek (Cal.gettime ());} /** * Get the last day of a certain week * * @param year * @param week * @return */public static Date getlastdayofweek (int year, int week) {Cale Ndar C = new GregorianCalendar (); C.set (Calendar.year, year); C.set (Calendar.month, calendar.january); C.set ( Calendar.date, 1); Calendar cal = (GregorianCalendar) c.clone (); Cal.add (Calendar.date, week * 7); return Getlastdayofweek (Cal.gettime ());} /** * Get the first day of a certain month * * @param year * @param month * @return */public static Date getfirestdayofmonth (int year, int month) { month = month-1; Calendar C = calendar.getinstance (); C.set (Calendar.year, year); C.set (Calendar.month, MONTH); @SuppressWarnings (" Static-access ") int day = C.getactualminimum (c.day_of_month); C.set (Calendar.day_of_month, day); return C.gettime ();} /** * mentions the last day of a certain month * * @param year * @param month * @return */public static Date getlastdayofmonth (int year, int month) {m Onth = month-1; Calendar C = Calendar.getiNstance (); C.set (Calendar.year, year); C.set (Calendar.month, MONTH); @SuppressWarnings ("static-access") int day = C.getactualmaximum (C.day_of_month); C.set (Calendar.day_of_month, day); return C.gettime ();} /** * Gets the first day of the week of the current date * * @param date * @return */public static date Getfirstdayofweek (date date) {Calendar c = new Gregori Ancalendar (); C.setfirstdayofweek (Calendar.monday); c.settime (date); C.set (Calendar.day_of_week, C.getfirstdayofweek ()); Mondayreturn c.gettime ();} /** * Get the last day of the week with the current date * * @param date * @return */public static date Getlastdayofweek (date date) {Calendar c = new Gregori Ancalendar (); C.setfirstdayofweek (Calendar.monday); c.settime (date); C.set (Calendar.day_of_week, C.getfirstdayofweek () + 6); Sundayreturn c.gettime ();} /** * Get the first day of a certain quarter * * @param year * @param quarter * @return */public static Date getfirstdayofquarter (int years, int quart ER) {int month = 0;if (Quarter > 4) {return null;} else {month = (quarter-1) * 3 + 1;} Return Getfirstdayofmonth (year, month);} /** *Get the last day of a certain quarter * * @param year * @param quarter * @return */public static Date getlastdayofquarter (int year, int quarter) {i NT month = 0;if (Quarter > 4) {return null;} else {month = quarter * 3;} Return Getlastdayofmonth (year, month);} /** * Get the first day of the year * * @param years * @return */public static Date getfirstdayofyear (int) {return getfirstdayofquarter (yea R, 1);} /** * Get the last day of the year * * @param years * @return */public static Date getlastdayofyear (int year) {return getlastdayofquarter , 4);} /** * Get the first day of a certain month * * @param year * @param month * @return */public static Date getfirstdayofmonth (int years, int month) {C Alendar C = calendar.getinstance (); C.set (Calendar.year, year); C.set (Calendar.month, month-1); C.set (calendar.day_of_ MONTH, C.getactualminimum (Calendar.day_of_month)); return C.gettime ();} /** * Gets the first and last day of the week of a certain month (Monday is the first day) (flag=true) * * @param year * @param month * @param week * @param flag * @return */ public static String Getdaybyweek (int year, int month, int week,boolean flag{Calendar cal = Calendar.getinstance (); Cal.set (Calendar.year, year); Cal.set (Calendar.month, month-1); Cal.set ( Calendar.week_of_month, WEEK); int dw = Cal.get (Calendar.day_of_week); if (!flag) Cal.settimeinmillis ( Cal.gettimeinmillis () + (8-DW) * 24 * 60*) Elsecal.settimeinmillis (Cal.gettimeinmillis ()-(dw-2) * 60 * 60* 1000); SimpleDateFormat formatter = new SimpleDateFormat ("Yyyy-mm-dd"); String showTime = Formatter.format (Cal.gettime ()); return showtime.tostring ();} public static String getstringtodate (date date) {SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd"); return Sdf.format (date);} /** * Convert String time format * * @param strtime * @return * @throws parseexception */public static string formattimestring (String strt IME) throws ParseException {SimpleDateFormat getsdf = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss.sss"); SimpleDateFormat resdf = new SimpleDateFormat ("yyyy year mm DD day"); return Resdf.format (Getsdf.parse (Strtime));} /** * Gets the number of weeks for a one month * @param date * @throws parseexceptIon * @throws Exception */public static int Getmonthweek (String date) throws ParseException {SimpleDateFormat SDF = new S Impledateformat ("yyyy-mm");D ate s = sdf.parse (Date); Calendar CA = calendar.getinstance (); Ca.settime (s); Ca.setfirstdayofweek (calendar.monday); int weeks = Ca.getactualmaximum (calendar.week_of_month); return weeks;};}

　　

Java Time Tool Class (Project utility)