Unicode编码与中文的转换

1.1.  将unicode编码转换为中文

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':                          value = (value << 4) + aChar - '0';                          break;                      case 'a':                      case 'b':                      case 'c':                      case 'd':                      case 'e':                      case 'f':                          value = (value << 4) + 10 + aChar - 'a';                          break;                      case 'A':                      case 'B':                      case 'C':                      case 'D':                      case 'E':                      case 'F':                          value = (value << 4) + 10 + aChar - 'A';                          break;                      default:                          throw new IllegalArgumentException(                                 "Malformed \\uxxxx encoding.");                      }                   }                   out[outLen++] = (char) value;               } else {                   if (aChar == 't') {                      aChar = '\t';                   } else if (aChar == 'r') {                      aChar = '\r';                   } else if (aChar == 'n') {                      aChar = '\n';                   } else if (aChar == 'f') {                      aChar = '\f';                   }                   out[outLen++] = aChar;               }            } else {               out[outLen++] = (char) aChar;            }        }        return new String(out, 0, outLen);     }

1.2.  将中文编码(不包含英文字符)为unicode编码

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

1.3.  将中文编码

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

1.4.  将中文解码

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