Java Regular implementation of various date formatting

Java Various date formatting
"2014-03-12 12:05:34",
"2014-03-12 12:05",
"2014-03-12 12",
"2014-03-12",
"2014-03",
"2014",
"20140312120534",
"2014/03/12 12:05:34",
"2014/3/12 12:5:34",
"March 12, 2014 13:5 34 seconds",
"201403121205",
"1234567890",
"20140312",
"201403",
"2000 13 33 13 13 13",
"30.12.2013",
"12.21.2013",
"21.1",
"13:05:34",
"12:05",
"14.1.8",
"14.10.18"

Package com.st.test;

Import Java.text.DateFormat;
Import Java.text.SimpleDateFormat;
Import Java.util.Date;
Import Java.util.HashMap;
Import Java.util.regex.Pattern;

public class Dateformatutil {

@SuppressWarnings ("finally")
public static string FormatDate (String datestr) {

hashmap<string, string> Dateregformat = new hashmap<string, string> ();
Dateregformat.put (
"^\\d{4}\\d+\\d{1,2}\\d+\\d{1,2}\\d+\\d{1,2}\\d+\\d{1,2}\\d+\\d{1,2}\\d*$",
"Yyyy-mm-dd-hh-mm-ss");//March 12, 2014 13:5 34 sec, 2014-03-12 12:05:34,2014/3/12 12:5:34
Dateregformat.put ("^\\d{4}\\d+\\d{2}\\d+\\d{2}\\d+\\d{2}\\d+\\d{2}$",
"yyyy-mm-dd-hh-mm");//2014-03-12 12:05
Dateregformat.put ("^\\d{4}\\d+\\d{2}\\d+\\d{2}\\d+\\d{2}$",
"Yyyy-mm-dd-hh");//2014-03-12 12
Dateregformat.put ("^\\d{4}\\d+\\d{2}\\d+\\d{2}$", "Yyyy-mm-dd");//2014-03-12
Dateregformat.put ("^\\d{4}\\d+\\d{2}$", "yyyy-mm");//2014-03
Dateregformat.put ("^\\d{4}$", "yyyy");//2014
Dateregformat.put ("^\\d{14}$", "Yyyymmddhhmmss");//20140312120534
Dateregformat.put ("^\\d{12}$", "yyyymmddhhmm");//201403121205
Dateregformat.put ("^\\d{10}$", "YYYYMMDDHH");//2014031212
Dateregformat.put ("^\\d{8}$", "YyyyMMdd");//20140312
Dateregformat.put ("^\\d{6}$", "yyyymm");//201403
Dateregformat.put ("^\\d{2}\\s*:\\s*\\d{2}\\s*:\\s*\\d{2}$",
"Yyyy-mm-dd-hh-mm-ss");//13:05:34 splicing Current date
Dateregformat.put ("^\\d{2}\\s*:\\s*\\d{2}$", "yyyy-mm-dd-hh-mm");//13:05 splicing Current date
Dateregformat.put ("^\\d{2}\\d+\\d{1,2}\\d+\\d{1,2}$", "Yy-mm-dd");//14.10.18 (year. month. Day)
Dateregformat.put ("^\\d{1,2}\\d+\\d{1,2}$", "yyyy-dd-mm");//30.12 (Sun. Month) Stitching current year
Dateregformat.put ("^\\d{1,2}\\d+\\d{1,2}\\d+\\d{4}$", "dd-mm-yyyy");//12.21.2013 (Sun. Month)

String curdate =new SimpleDateFormat ("Yyyy-mm-dd"). Format (new Date ());
DateFormat formatter1 =new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");
DateFormat Formatter2;
String Datereplace;
String strsuccess= "";
try {
For (String Key:dateRegFormat.keySet ()) {
if (Pattern.compile (key). Matcher (DATESTR). Matches ()) {
Formatter2 = new SimpleDateFormat (Dateregformat.get (key));
if (Key.equals ("^\\d{2}\\s*:\\s*\\d{2}\\s*:\\s*\\d{2}$")
|| Key.equals ("^\\d{2}\\s*:\\s*\\d{2}$")) {//13:05:34 or 13:05 stitching the current date
Datestr = curdate + "-" + datestr;
} else if (Key.equals ("^\\d{1,2}\\d+\\d{1,2}$")) {//21.1 (day. Month) Stitching current year
Datestr = curdate.substring (0, 4) + "-" + datestr;
}
Datereplace = Datestr.replaceall ("\\d+", "-");
System.out.println (Dateregexparr[i]);
strsuccess = Formatter1.format (Formatter2.parse (datereplace));
Break
}
}
} catch (Exception e) {
System.err.println ("-----------------date format is invalid:" +datestr);
throw new Exception ("Invalid date format");
} finally {
return strsuccess;
}
}
public static void Main (string[] args) {
String[] Datestrarray=new string[]{
"2014-03-12 12:05:34",
"2014-03-12 12:05",
"2014-03-12 12",
"2014-03-12",
"2014-03",
"2014",
"20140312120534",
"2014/03/12 12:05:34",
"2014/3/12 12:5:34",
"March 12, 2014 13:5 34 seconds",
"201403121205",
"1234567890",
"20140312",
"201403",
"2000 13 33 13 13 13",
"30.12.2013",
"12.21.2013",
"21.1",
"13:05:34",
"12:05",
"14.1.8",
"14.10.18"
};
for (int i=0;i<datestrarray.length;i++) {
System.out.println (Datestrarray[i] + "------------------------------". Substring (1,30-datestrarray[i].length ()) + FormatDate (Datestrarray[i]));
}

}

}

Java Regular implementation of various date formatting