[Java] Time to get a custom format

Import Java.io.ioexception;import Java.text.dateformat;import Java.text.parseexception;import Java.text.simpledateformat;import Java.util.arraylist;import Java.util.calendar;import Java.util.Date;import Java.util.list;import cn.com.agree.ab.trade.core.trade;/** * <DL> * <DT><B> function Description </b></dt > * String Processing Tool * </DL> * * @author * @since 2015-6-3 */public class Dateutil {/** * <b> feature description </b> get custom grid             Type of time * * @param format * format * <p> * <b> for example:</b><br> * Use examples to illustrate String a=netcheck.getdatastring ("YyyyMMdd"); * </p> */public static string getdatastring (string format) {DateFormat DateFormat = new SimpleDateFormat (format); return Dateformat.format (New Date ());} public static string Getnextday (date date, string format) {Calendar calendar = calendar.getinstance (); Calendar.settime ( date); Calendar.add (Calendar.day_of_month, -7);d ate = Calendar.gettime ();D Ateformat DateFormat = New SimpleDateFormat (format); return Dateformat.format (date);} public static string Getformatdate (String datestr) throws ParseException {SimpleDateFormat df = new SimpleDateFormat ("yyy YMMDDHHMMSS ");D ate Date = Null;date = Df.parse (datestr);D ateformat dateformat = new SimpleDateFormat (" Yyyy-mm-dd HH:mm: SS "); return Dateformat.format (date);} public static string Getnextday (date date, string format, int days) {Calendar calendar = calendar.getinstance (); CALENDAR.S Ettime (date), Calendar.add (Calendar.day_of_month, days);d ate = Calendar.gettime ();D ateformat DateFormat = new SimpleDateFormat (format); return Dateformat.format (date);} public static list<string> getmonthweekends (trade trade,int month,int year) throws Ioexception{list<string > hostdays = new arraylist<string> (); Calendar cal = Calendar.getinstance (); Cal.set (Calendar.year, year); Cal.set (Calendar.month, month-1); Cal.set ( Calendar.day_of_month, 1); int startIndex = Cal.get (Calendar.day_of_week)-1; 0~6 = Sunday ~ Saturday int EndinDex = StartIndex + getlastdayofmonth (year, month)-1;int startday = 1;for (int i = 0; i <; i++) {if (I >= starti Ndex && I <= endIndex) {cal.set (calendar.day_of_month, StartDay); if (Cal.get (calendar.day_of_week) ==1| | Cal.get (Calendar.day_of_week) ==7) {Hostdays.add (startday+ "");} startday++;} }return Hostdays;} public static Boolean Isleapyear (int.) {return (year% 4 = = 0 && Year% 100! = 0) | | (Year% 400 = = 0);} public static int Getlastdayofmonth (int year, int month) {if (month = = 1 | | month = = 3 | | month = = 5 | | month = = 7 | | mont H = = 8| | Month = = 10 | | month = =) {return 31;} if (month = = 4 | | month = = 6 | | month = = 9 | | month = = one) {return 30;} if (month = = 2) {if (Isleapyear (year)) {return;} else {return 28;}} return 0;}}

[Java] Time to get a custom format