Java判断字符串是否是乱码

/**

     * 判断字符是否是中文

     *

     * @param c 字符

     * @return 是否是中文

     */

     public   static   boolean   isChinese ( char   c )   {

         Character . UnicodeBlock  ub   =   Character . UnicodeBlock . of ( c ) ;

         if   ( ub   ==   Character . UnicodeBlock . CJK_UNIFIED_IDEOGRAPHS

                 ||   ub   ==   Character . UnicodeBlock . CJK_COMPATIBILITY_IDEOGRAPHS

                 ||   ub   ==   Character . UnicodeBlock . CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A

                 ||   ub   ==   Character . UnicodeBlock . GENERAL_PUNCTUATION

                 ||   ub   ==   Character . UnicodeBlock . CJK_SYMBOLS_AND_PUNCTUATION

                 ||   ub   ==   Character . UnicodeBlock . HALFWIDTH_AND_FULLWIDTH_FORMS )   {

             return   true ;

         }

         return   false ;

     }

 

     /**

     * 判断字符串是否是乱码

     *

     * @param strName 字符串

     * @return 是否是乱码

     */

     public   static   boolean   isMessyCode ( String   strName )   {

         Pattern   p   =   Pattern . compile ( "\s*|t*|r*|n*" ) ;

         Matcher   m   =   p . matcher ( strName ) ;

         String   after   =   m . replaceAll ( "" ) ;

         String   temp   =   after . replaceAll ( "\p{P}" ,   "" ) ;

         char [ ]   ch   =   temp . trim ( ) . toCharArray ( ) ;

         float   chLength   =   ch . length ;

         float   count   =   0 ;

         for   ( int   i   =   0 ;   i   <   ch . length ;   i ++ )   {

             char   c   =   ch [ i ] ;

             if   ( ! Character . isLetterOrDigit ( c ) )   {

                 if   ( ! isChinese ( c ) )   {

                     count   =   count   +   1 ;

                 }

             }

         }

         float   result   =   count   /   chLength ;

         if   ( result   >   0.4 )   {

             return   true ;

         }   else   {

             return   false ;

         }

 

     }

 

     public   static   void   main ( String [ ]   args )   {

         System . out . println ( isMessyCode ( "韩顺平" ) ) ;

         System . out . println ( isMessyCode ( "你好" ) ) ;

     }