Java Time Processing Tool class--dateutils

Package com.hexiang.utils;/** * @ (#) Dateutil.java * * * @author Kidd * @version 1.00 2007/8/8 */import java.util.*;import Java.text.*;import Java.sql.timestamp;public class Dateutils {/** * time range: Years */public static final int year = 1;/** * Time range: Quarter degree */public static final int QUARTER = 2;/** * Time range: Month */public static final int month = 3;/** * Time range: */public static FINA l INT tendays = 4;/** * Time range: Week */public static final int WEEK = 5;/** * Time range: Day */public static final int daily = 6;/* base time * /private Date fiducialdate = null;private Calendar cal = null;private dateutils (Date fiducialdate) {if (Fiducialdate! = Nu ll) {this.fiducialdate = Fiducialdate;} else {this.fiducialdate = new Date (System.currenttimemillis ());} this.cal = Calendar.getinstance (); This.cal.setTime (this.fiducialdate); This.cal.set (calendar.hour_of_day, 0); This.cal.set (calendar.minute, 0); This.cal.set (Calendar.second, 0); This.cal.set (Calendar.millisecond, 0); This.fiducialdate = This.cal.getTime ();} /** * Get datehelper instance * * @param fIducialdate * Base time * @return Date */public static dateutils getinstance (date fiducialdate) {return new Dateutil S (fiducialdate);} /** * Gets the Datehelper instance, using the current time as the base time * * @return Date */public static dateutils getinstance () {return new dateutils (null);} /** * Gets the first day of the year * * @param offset * offset * @return Date */public date getfirstdayofyear (int offset) {Cal.settime ( This.fiducialdate); Cal.set (Calendar.year, Cal.get (calendar.year) + offset); Cal.set (Calendar.month, Calendar.january); Cal.set (Calendar.day_of_month, 1); return Cal.gettime ();} /** * Get the last day of the year * * @param offset * offset * @return Date */public date getlastdayofyear (int offset) {Cal.settime ( This.fiducialdate); Cal.set (Calendar.year, Cal.get (calendar.year) + offset); Cal.set (Calendar.month, Calendar.december); Cal.set (calendar.day_of_month); return Cal.gettime ();} /** * Get the first day of the quarter * * @param offset * offset * @return Date */public date getfirstdayofquarter (int offset) {Cal.sett IME (this.fiducialdate); CAL.add (Calendar.month, offset * 3); int mon = Cal.get (calendar.month); if (Mon >= calendar.january && Mon <= Ca Lendar. March) {Cal.set (calendar.month, calendar.january); Cal.set (Calendar.day_of_month, 1);} if (Mon >= calendar.april && Mon <= calendar.june) {cal.set (calendar.month, Calendar.april); Cal.set ( Calendar.day_of_month, 1);} if (Mon >= calendar.july && Mon <= calendar.september) {cal.set (calendar.month, calendar.july); Cal.set ( Calendar.day_of_month, 1);} if (Mon >= calendar.october && Mon <= calendar.december) {cal.set (calendar.month, Calendar.october); Cal.set (Calendar.day_of_month, 1);} return Cal.gettime ();} Public Date Getyesterday () {Long time = This.fiducialDate.getTime ()-* $ * * 1000;return new Date (time);} Public Date Gettomorrow () {Long time = This.fiducialDate.getTime () + * * * * * 1000;return new Date (time);} /** * Get the last day of the quarter * * @param offset * offset * @return Date */public date getlastdayofquarter (int oFfset) {cal.settime (this.fiducialdate); Cal.add (Calendar.month, offset * 3); int mon = Cal.get (calendar.month); if (Mon >= calendar.january && Mon <= calendar.march) {cal.set (calendar.month, Calendar.march); Cal.set ( Calendar.day_of_month, 31);} if (Mon >= calendar.april && Mon <= calendar.june) {cal.set (calendar.month, Calendar.june); Cal.set ( Calendar.day_of_month, 30);} if (Mon >= calendar.july && Mon <= calendar.september) {cal.set (calendar.month, Calendar.september); Cal.set (Calendar.day_of_month, 30);} if (Mon >= calendar.october && Mon <= calendar.december) {cal.set (calendar.month, Calendar.december); Cal.set (Calendar.day_of_month, 31);} return Cal.gettime ();} /** * Get the last day of the month * * @param offset * offset * @return Date */public date getfirstdayofmonth (int offset) {Cal.settim E (this.fiducialdate); Cal.add (calendar.month, offset); Cal.set (Calendar.day_of_month, 1); return Cal.gettime ();} /** * Get the last day of the month * * @param offset * offsets* @return Date */public date getlastdayofmonth (int offset) {cal.settime (this.fiducialdate); Cal.add (Calendar.month, Offset + 1); Cal.set (Calendar.day_of_month, 1); Cal.add (Calendar.day_of_month,-1); return Cal.gettime ();} /** * Get the first day of Lent * * @param offset * offset * @return Date */public date getfirstdayoftendays (int offset) {Cal.setti  Me (this.fiducialdate); int day = Cal.get (Calendar.day_of_month), if (day >=) {day = $;} else if (day >= one) {day = 11;} else {day = 1;} if (Offset > 0) {day = day + ten * Offset;int monoffset = Day/30;day = day% 30;cal.add (Calendar.month, monoffset); Cal . Set (Calendar.day_of_month, day);} else {int monoffset = ten * Offset/30;int dayoffset = ten * offset% 30;if ((day + Dayoffset) > 0) {day = day + dayoffs ET;} else {monoffset = Monoffset-1;day = day-dayoffset-10;} Cal.add (Calendar.month, Monoffset); Cal.set (Calendar.day_of_month, day);} return Cal.gettime ();} /** * Get the last day of Lent * * @param offset * offset * @return Date */public Date getlastdayoftendays (int offset) {Date date = Getfirstdayoftendays (offset + 1); Cal.settime (Date); Cal.add (Calendar.day_ Of_month,-1); return Cal.gettime ();} /** * Gets the first day of the week (MONDAY) * * @param offset * offset * @return Date */public date getfirstdayofweek (int offset) {cal. SetTime (this.fiducialdate); Cal.add (Calendar.day_of_month, offset * 7); Cal.set (Calendar.day_of_week, Calendar.monday); return Cal.gettime ();} /** * Gets the last day of the week (SUNDAY) * * @param offset * offset * @return Date */public date getlastdayofweek (int offset) {cal. SetTime (this.fiducialdate); Cal.add (Calendar.day_of_month, offset * 7); Cal.set (Calendar.day_of_week, Calendar.monday); Cal.add (Calendar.day_of_month, 6); return Cal.gettime ();} /** * Gets the first day of the specified time range * * @param daterangetype * Time range Type * @param offset * offset * @return Date */public Date getfirstdate (int daterangetype, int offset) {return null;} /** * Gets the last day of the specified time range * * @param daterangetype * Time range Type * @param offset * offset * @retUrn Date */public date getlastdate (int daterangetype, int offset) {return null;}  /** * The amount of time to add a specified calendar field to the base time according to the calendar rules * * @param field * Calendar field, using the Calendar field constants defined by the Calendar class * @param offset * Offset * @return Date */public date Add (int field, int offset) {cal.settime (this.fiducialdate); Cal.add (field, offset); return cal . GetTime ();} /** * Add a single time unit for the specified calendar field for the base time according to the calendar rules * * @param field * Calendar field, use Calendar field constants defined by the Calendar class * @param up * Specify calendar The scrolling direction of the value of the field. true: Scroll up/false: Scroll down * @return date */public date roll (int field, Boolean up) {cal.settime (this.fiducialdate); Cal.roll (f Ield, up); return Cal.gettime ();} /** * Convert String to date * * @param datestr * Date String * @param format * Date format * @return Date */public static Da Te strtodate (String datestr, string format) {Date date = Null;if (datestr! = null && (!datestr.equals (""))) {Datef Ormat df = new SimpleDateFormat (format); try {date = Df.parse (DATESTR);} catch (ParseException e) {e.printstacktrace ();}} return date;} /* * Convert string to date, date format yyyy-mm-dd hh:ss * * @param datestr * Date String * @return date */public static Date Strtodate (String datestr) {Date date = Null;if (datestr! = null && (!datestr.equals ("))) {if (Datestr.matches (" \\d{4}-\\d{1,2}-\\d{1,2} ") {datestr = datestr + "00:00";} else if (Datestr.matches ("\\d{4}-\\d{1,2}-\\d{1,2} \\d{1,2}")) {datestr = Datestr + ": xx";} else {System.out.println ( Datestr + "Malformed"); return null;} DateFormat df = new SimpleDateFormat ("Yyyy-mm-dd hh:ss"); try {date = Df.parse (DATESTR);} catch (ParseException e) {E.print StackTrace ();}} return date;}  /** * Convert Date to String * * @param date * Date instance * @param format * Date format * @return Date */public static string DATETOSTR (date date, String format) {return (date = = null)? "": New SimpleDateFormat (format). format (date);} public static String datetostr (date date) {return (date = = null)? "": New SimpleDateFormat ("Yyyy-mm-dd hh:mm:ss"). Format (date); /** * Get current date year-month-day * * @return Date */publicStatic String Getcurrentdate () {DateFormat f = new SimpleDateFormat ("Yyyy-mm-dd"); return F.format (calendar.getinstance (). GetTime ());} public static void Main (string[] args) {dateutils datehelper = dateutils.getinstance ();/* year */for (int i =-5; I <= 5; i++) {System.out.println ("firstdayofyear (" + i + ") =" + Datehelper.getfirstdayofyear (i)); System.out.println ("lastdayofyear (" + i + ") =" + Datehelper.getlastdayofyear (i));} /* Quarter */for (int i =-5; I <= 5; i++) {System.out.println ("firstdayofquarter (" + i + ") =" + DATEHELPER.GETFIRSTDA Yofquarter (i)); System.out.println ("Lastdayofquarter (" + i + ") =" + Datehelper.getlastdayofquarter (i));} /* Month */for (int i =-5; I <= 5; i++) {System.out.println ("firstdayofmonth (" + i + ") =" + DATEHELPER.GETFIRSTDAYOFM Onth (i)); System.out.println ("Lastdayofmonth (" + i + ") =" + Datehelper.getlastdayofmonth (i));} /* Week */for (int i =-5; I <= 5; i++) {System.out.println ("firstdayofweek (" + i + ") =" + Datehelper.getfirstdayofwee K (i)); System.out.println ("Lastdayofweek (" + i + ") =" + Datehelper.getlastdayofweek (i));} /* tendays */for (int i =-5; I <= 5; i++) {System.out.println ("firstdayoftendays (" + i + ") =" + DATEHELPER.GETFIRSTDA Yoftendays (i)); System.out.println ("lastdayoftendays (" + i + ") =" + datehelper.getlastdayoftendays (i));}} /** * takes the current date as a string, "xxxx year XX month XX Day" * * @return java.lang.String */public static string Getprintdate () {String printdate = "" ; Calendar calendar = Calendar.getinstance (); Calendar.settime (new Date ());p rintdate + = Calendar.get (calendar.year) + "year" ;p rintdate + = (Calendar.get (calendar.month) + 1) + "month";p rintdate + = Calendar.get (calendar.date) + "Day"; return printdate;}  /** * Converts the specified date string to a Date object * * @param datestr * Date String * @return java.util.Date */public static Date GetDate (string DATESTR, String format) {if (datestr = = null) {return new Date ();} if (format = = null) {format = "yyyy-mm-dd";} SimpleDateFormat SDF = new SimpleDateFormat (format); try {Date date = Sdf.parse (DATESTR); returnDate;} catch (Exception e) {return null;}} /** * Gets the string form date of the corresponding date from the specified timestamp "xxxx-xx-xx" * @param dateTime * @return, string */public static string GETDATEFROMD Atetime (Timestamp datetime) {simpledateformat SDF = new SimpleDateFormat ("Yyyy-mm-dd"); return Sdf.format (DateTime). ToString ();} /** * Get current time return java.sql.Timestamp * * @return Timestamp */public static Timestamp Getnowtimestamp () {Long curtime = System.currenttimemillis (); return new Timestamp (curtime);}

　　

Java Time Processing Tool class--dateutils