Unicode编码与中文的转换

public String decodeUnicode(String src) {
       char[] in = src.toCharArray();
       char aChar;
       char[] out = new char[src.length()];
       int outLen = 0;
       int off = 0;
       int end = src.length();
 
       while (off < end) {
           aChar = in[off++];
           if (aChar == '\\') {
              aChar = in[off++];
              if (aChar == 'u') {
                  int value = 0;
                  for (int i = 0; i < 4; i++) {
                     aChar = in[off++];
                     switch (aChar) {
                     case '0':
                     case '1':
                     case '2':
                     case '3':
                     case '4':
                     case '5':
                     case '6':
                     case '7':
                     case '8':
                     case '9':
 '0';
                         break;
                     case 'a':
                     case 'b':
                     case 'c':
                     case 'd':
                     case 'e':
                     case 'f':
 'a';
                         break;
                     case 'A':
                     case 'B':
                     case 'C':
                     case 'D':
                     case 'E':
                     case 'F':
 'A';
                         break;
                     default:
                         throw new IllegalArgumentException(
"Malformed \\uxxxx encoding.");
                     }
                  }
                  out[outLen++] = (char) value;
              } else {
                  if (aChar == 't') {
'\t';
                  } else if (aChar ==  'r') {
'\r';
                  } else if (aChar ==  'n') {
'\n';
                  } else if (aChar ==  'f') {
'\f';
                  }
                  out[outLen++] = aChar;
              }
           } else {
              out[outLen++] = (char) aChar;
           }
       }
       return  new String(out, 0, outLen);
    }

public String encodeUnicode(String str) {
       int iValue = 0;
"";
       for (int i = 0; i < str.length(); i++) {
           iValue = (int) str.charAt(i);
           if (iValue <= 256) {
              uStr += str.charAt(i);
           } else {
"\\u" + Integer.toHexString(iValue);
           }
       }
       return uStr;
    }

public String encoding(String srcStr){
       
"";
       try {
           desStr = URLEncoder.encode(srcStr,  "UTF-8");
       } catch (UnsupportedEncodingException e) {
           e.printStackTrace();
       }
       
       return desStr;
    }

public String decoding(String srcStr){
"";
       
       try {
           desStr = URLDecoder.decode(srcStr,  "UTF-8");
       } catch (UnsupportedEncodingException e) {
           e.printStackTrace();
       }
       return desStr;
    }