자바 정규 각종 날짜 포맷 실현

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 dateRegFormat = new HashMap();          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*$" ,                  "yyyy-MM-dd-HH-mm-ss" ); //2014 3 12 13 5 34 ，2014-03-12 12:05:34，2014/3/12 12:5:34          dateRegFormat.put( "^\\d{4}\\D+\\d{2}\\D+\\d{2}\\D+\\d{2}\\D+\\d{2}$" ,                  "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           dateRegFormat.put( "^\\d{2}\\s*:\\s*\\d{2}$" , "yyyy-MM-dd-HH-mm" ); //13:05           dateRegFormat.put( "^\\d{2}\\D+\\d{1,2}\\D+\\d{1,2}$" , "yy-MM-dd" ); //14.10.18( . . )          dateRegFormat.put( "^\\d{1,2}\\D+\\d{1,2}$" , "yyyy-dd-MM" ); //30.12( . )          dateRegFormat.put( "^\\d{1,2}\\D+\\d{1,2}\\D+\\d{4}$" , "dd-MM-yyyy" ); //12.21.2013( . . )
           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 13:05                          dateStr = curDate + "-" + dateStr;                      } else if (key.equals( "^\\d{1,2}\\D+\\d{1,2}$" )) { //21.1 ( . )                          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( "----------------- :" +dateStr);              throw new Exception( " " );          } 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" ,                  "2014 3 12 13 5 34 " ,                  "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              System.out.println(dateStrArray[i] + "------------------------------" .substring( 1 , 30 -dateStrArray[i].length())+ FormatDate(dateStrArray[i]));          }                 }
  }