SIMONE
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汉字编码解码

 

     public   static  String  escape(String src) {
         int  i;  
         char  j;  
        StringBuffer tmp  =   new  StringBuffer();
        tmp.ensureCapacity(src.length() * 6 );
         for  (i = 0 ;i < src.length() ;i ++  ) {
            j  =  src.charAt(i);
             if  (Character.isDigit(j)  ||  Character.isLowerCase(j)  ||  Character.isUpperCase(j))
                tmp.append(j);
             else   if  (j < 256 ) {
                tmp.append(  " % "  );
                 if  (j < 16 )
                    tmp.append(  " 0 "  );
                tmp.append( Integer.toString(j, 16 ) );
            } else {
                tmp.append(  " %u "  );
                tmp.append( Integer.toString(j, 16 ) );
            }   
        }   
         return  tmp.toString();
    }  
     public   static  String  unescape(String src) {
        StringBuffer tmp  =   new  StringBuffer();
        tmp.ensureCapacity(src.length());
         int   lastPos = 0 ,pos = 0 ;   char  ch;
         while  (lastPos < src.length()) {
            pos  =  src.indexOf( " % " ,lastPos);
             if  (pos  ==  lastPos) {
                 if  (src.charAt(pos + 1 ) == ' u ' ) {
                    ch  =  ( char )Integer.parseInt(src.substring(pos + 2 ,pos + 6 ), 16 );
                    tmp.append(ch);
                    lastPos  =  pos + 6 ;
                } else {
                    ch  =  ( char )Integer.parseInt(src.substring(pos + 1 ,pos + 3 ), 16 );
                    tmp.append(ch);
                    lastPos  =  pos + 3 ;
                }
            } else {
                 if  (pos  ==   - 1 ) {
                    tmp.append(src.substring(lastPos));
                    lastPos = src.length();
                } else {
                    tmp.append(src.substring(lastPos,pos));
                    lastPos = pos;
                }     
            }   
        }   
         return  tmp.toString(); 
    }     
posted on 2006-03-30 20:43 SIMONE 阅读(392) 评论(0)  编辑  收藏 所属分类: JAVA

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