Frequently used dates in Java format (full)

Import Java.text.dateformat;import Java.text.parseexception;import Java.text.simpledateformat;import Java.util.calendar;import java.util.date;/** * Gets the current date format: Yyyy-mm-dd HH:mm:ss * * @author Arthur (user_006) * @version 1.0 .0 2010/04/24 14:00 (Saturday) */public class Timerutil {/** * Gets the current date, default format * * @return current date */public synchronized static Da Te Getcurrentcalendar () {Calendar calendar = calendar.getinstance (); return Calendar.gettime ();} /** * Gets the current date, format yyyy-mm-dd, such as: 2010-04-24 * * @return */public synchronized static String getcurrentdate () {Calendar CA Lendar = Calendar.getinstance (); StringBuffer sb = new StringBuffer (), Sb.append (Calendar.get (Calendar.year)). Append ("-"); Sb.append (Calendar.get ( Calendar.month) + 1). Append ("-"); Sb.append (Calendar.get (Calendar.day_of_month)); return sb.tostring ();}  /** * Converts the date of the character form to the type of date, the format yyyy-mm-dd * * @param the string form of date * Date * * @return data type Date */public synchronized Static Date Converttodate (String date) {DateFormat format = new simpleDateFormat ("Yyyy-mm-dd"); try {return format.parse (date);} catch (ParseException e) {e.printstacktrace ();} return null;}  /** * Convert the date to the specified format * * @param date * The format to be converted * @param pattern * converted formats * @return */public synchronized  Static date format (date date, String pattern) {if (pattern! = null && Pattern.trim (). Length () > 0) {dateformat format = new SimpleDateFormat (pattern); String stringdate = Format.format (date); return timerutil.converttodate (stringdate);} return null;}  /** * Convert date to string, format yyyy-mm-dd HH:mm:ss * * @param date * dates to convert * @return */public synchronized static string ConvertToString (date date) {DateFormat format = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss"); return Format.format (date) ;}  /** * Convert date to string, format yyyy-mm-dd HH:mm:ss * * @param date * dates to convert * @return */public synchronized static string Converttostrshort (date date) {DateFormat format = new SimpleDateFormat ("Yyyy-mm-dd"); return Format.format (date);} /** * Convert date to string, format yyYYMMDDHHMMSS * * @param date * dates to convert * @return */public synchronized static String convertToString2 (date date {DateFormat format = new SimpleDateFormat ("Yyyymmddhhmmss"); return Format.format (date);} /** * Convert a date to a string of the specified format * * @param date * The format to convert * @param formattext * converted formats * @return */public SYNCHR onized static String converttostring (Date date,string formattext) {dateformat format = new SimpleDateFormat (formattext); Calendar calendar = Calendar.getinstance (); StringBuffer sb = new StringBuffer (), Sb.append (Calendar.get (Calendar.year)). Append ("-"); Sb.append (Calendar.get ( Calendar.month) + 1). Append ("-"); Sb.append (Calendar.get (Calendar.day_of_month)); return Format.format (date);} /** * Get this Monday date * * @return */public synchronized static date Getmondayofweek () {Calendar calendar = calendar.getinstance ( ); Calendar.set (Calendar.day_of_week, calendar.monday);//This setting starts from Monday, if you need to take the initiative according to the system time zone, then return by the way below Calendar.gettime ();} /** * Get this Sunday day * * @return */public Synchronized static Date Getcurrentweekday () {Calendar calendar = calendar.getinstance (); Calendar.add (Calendar.date, Getcurrentplus ());//The date of the current date plus the number of days between the current date and this Sunday return Calendar.gettime ();} /** * Get last Sunday date * * @return */public synchronized static date Getpreviousweekday () {Calendar calendar = Calendar.getinstan CE ();//Calendar.set (Calendar.day_of_week, calendar.sunday+7); Calendar.add (Calendar.date, Getcurrentplus ()-7);// Return Calendar.gettime () with the date of the current date plus the number of days that the current date differs from this Sunday;} /** * Get last Sunday date * * @return */public synchronized static date Getpreviousmonday () {Calendar calendar = Calendar.getinstanc E ();//Calendar.set (Calendar.day_of_week, calendar.sunday+7); Calendar.add (Calendar.date, Getcurrentplus ()-13);// Return Calendar.gettime () with the date of the current date plus the number of days that the current date differs from this Sunday;} /** * Get last Sunday date * * @return */public synchronized static date Getnextweekday () {Calendar calendar = calendar.getinstance () ;//Calendar.set (Calendar.day_of_week, calendar.sunday+7); Calendar.add (Calendar.date, Getcurrentplus () + 1 + 6);Return Calendar.gettime () with the date of the current date plus the number of days that the current date differs from this Sunday;} /** * Get last Sunday date * * @return */public synchronized static date Getnextmonday () {Calendar calendar = calendar.getinstance (); Calendar.set (Calendar.day_of_week, calendar.sunday+7); Calendar.add (Calendar.date, Getcurrentplus () + 1);// Return Calendar.gettime () with the date of the current date plus the number of days that the current date differs from this Sunday;} /** * Gets the number of days between the current date and the week Sunday * * @return */public synchronized static int getcurrentplus () {Calendar calendar = Calendar.geti Nstance (); int days = Calendar.get (Calendar.day_of_week)-1;//in China is already Monday as the first day of the week, so here minus 1return 7-days;} public synchronized static int getcurrentyear () {Calendar calendar = calendar.getinstance (); return Calendar.get ( Calendar.year);} /** * Returns the first day of the month for the specified date * * @param date * @return */@SuppressWarnings ("static-access") public synchronized static date GetFirst Dayinmonth (date date) {Calendar calendar = calendar.getinstance (); Calendar.settime (date); Calendar.set (Calendar. DATE, 1); return Calendar.gettime ();} /** * Returns the last day of the month on the specified date * * @param datE * @return */@SuppressWarnings ("static-access") public synchronized static date Getlastdayinmonth (date date) {Calendar Calendar = Calendar.getinstance (); Calendar.settime (date); Calendar.add (Calendar. MONTH, 1); Calendar.set (Calendar. DATE, 1); Calendar.add (Calendar. DATE,-1); return Calendar.gettime ();} /* * Calculates the number of days between two dates */public static int getdaysbetween (Calendar d1, calendar D2) {if (D1.after (D2)) {Java.util.Calendar swap = D1;D1 = D2;d2 = swap;} int days = D2.get (calendar.day_of_year)-D1.get (calendar.day_of_year); int y2 = D2.get (calendar.year); if (D1.get ( calendar.year)! = y2) {D1 = (Calendar) d1.clone ();d o {days + = D1.getactualmaximum (calendar.day_of_year);// Get the actual days of the year D1.add (Calendar.year, 1);} while (D1.get (calendar.year)! = y2);} return days;} /* * Calculates the time between two dates */public static String getgaptime (date createtime) {//TODO auto-generated method Stubcalendar D2 = Calen Dar.getinstance (); Calendar D1 = calendar.getinstance ();d 1.setTime (createtime); int days = D2.get (calendar.day_of_year)-D1.get (CAlendar.  Day_of_year); if (days < 1) {int hour = D2.get (calendar.hour_of_day)-D1.get (Calendar.hour_of_day); if (hour < 1) {int Munites = D2.get (calendar.minute)-D1.get (Calendar.minute); if (munites = = 0) {return "just";} else {return munites + "minutes ago" ;}} else {return hour + "hour Ago";}} else {return days + "day before";}} Add days public static String AddDays (Int. day) {Calendar calendar = calendar.getinstance (); Calendar.add (calendar.day_of_ MONTH, day); StringBuffer sb = new StringBuffer (), Sb.append (Calendar.get (Calendar.year)). Append ("-"); Sb.append (Calendar.get ( Calendar.month) + 1). Append ("-"); Sb.append (Calendar.get (Calendar.day_of_month)); return sb.tostring ();}     Add years public static string AddYears (string now, int year) throws parseexception{Calendar fromcal=calendar.getinstance ();   DateFormat dateformat=new SimpleDateFormat ("Yyyy-mm-dd");   Date Date=dateformat.parse (now);   Fromcal.settime (date);      Fromcal.add (Calendar.year, year); Return Dateformat.format (Fromcal.gettime ()); }//plus days (specific time) publicstatic string Adddate (String now, Int. day) throws parseexception{Calendar fromcal=calendar.getinstance ();   DateFormat dateformat=new SimpleDateFormat ("Yyyy-mm-dd");   Date Date=dateformat.parse (now);   Fromcal.settime (date);      Fromcal.add (Calendar.date, day); Return Dateformat.format (Fromcal.gettime ()); }/** * How much time * @throws parseexception * * * @SuppressWarnings ("deprecation") public static void main (string[] args) throws Par seexception {System.out.println (Timerutil.addyears ("2008-12-01", 7));}   /*public static void Main (string[] args) {String createdate = "2008-12-01";   SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");    try {Date date = Sdf.parse (CreateDate);    Calendar cl = Calendar.getinstance ();    Cl.settime (date);    Cl.add (calendar.date,31);    String temp = "";    temp = Sdf.format (Cl.gettime ());   SYSTEM.OUT.PRINTLN (temp);   } catch (ParseException e) {//TODO auto-generated catch block E.printstacktrace (); }}*/}

Frequently used dates in Java format (full)