Parse special locale Date Format

It is still a problem encountered at work. Generally, a date Widget is provided on the UI to allow users to select a date. The general logic is the short date mode of DateFormatter. However, on the UI, some locale formats (such as Polish) are Medium: yyyy/mm/dd, but the Short date mode of Polish locale is dd/mm/yy.

For java. text. dateFormat. parse (String source, ParsePosition pos), the default resolution is wide: even if the user input date is not input in the format required by the object, it can be parsed as a date, the resolution is successful.

However, for special locale such as Polish, In view of inconsistent formats (yyyy/mm/dd vs dd/mm/yy ), A Medium-mode string cannot be parsed using the Short date mode of the Dateformat object. If you try to parse the string, an exception is thrown.

Solution: If the Short mode fails to be parsed, use the Medium mode for parsing.

package tools;import java.text.DateFormat;import java.text.ParseException;import java.util.ArrayList;import java.util.Date;import java.util.List;import java.util.Locale;public class MedeiumAndShortDateFormalForAllLocale {    /**     * @param args     */    public static void main(String[] args) {        // TODO Auto-generated method stub        List<Locale> allLocale = new ArrayList<Locale>();        System.out.println(System.getProperty("java.version"));        Locale[] locales = Locale.getAvailableLocales();        allLocale = Arrays.asList(locales);                Date date = new Date();        DateFormat df = null;        String strDate = DateFormat.getDateInstance(DateFormat.SHORT).format(date);        System.out.println(strDate);                for(Locale locale : allLocale){            if(locale != null){                df = DateFormat.getDateInstance(DateFormat.SHORT, locale);            }            try {                date = df.parse(strDate);            } catch (ParseException e) {                // TODO Auto-generated catch block                System.out.println("Error in parsing locale with Short: " + locale                        + "==>"                         + locale.getDisplayCountry());                df = DateFormat.getDateInstance(DateFormat.MEDIUM, locale);                try {                    date = df.parse(strDate);                } catch (ParseException e1) {                    // TODO Auto-generated catch block                    System.out.println("Error in parsing locale with Medium: " + locale                            + "==>"                             + locale.getDisplayCountry());                    e1.printStackTrace();                }                e.printStackTrace();            }//            DateFormat mediumFormat = DateFormat.getDateInstance(DateFormat.MEDIUM, locale);             System.out.println("Medium Fromat for Today: "                     + locale                    + "=>"                    + locale.getCountry()                    + "=>"                    + locale.getDisplayCountry()                    + "=>"                    + df.format(date));         }    }}