将Unicode编码的中文转换为中文代码实现

 /**
     * 将包含Unicode格式的字符串转为中文的字符串
     * @param line
     * @return
     */
    public static String parseUnicode(String line) {
        int len = line.length();
        char[] out = new char[len];// 保存解析以后的结果
        int outLen = 0;
        for (int i = 0; i < len; i++) {
            char aChar = line.charAt(i);
            if (aChar == '\\') {
                aChar = line.charAt(++i);
                if (aChar == 'u') {
                    int value = 0;
                    for (int j = 0; j < 4; j++) {
                        aChar = line.charAt(++i);
                        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++] = aChar;
            }
        }
        return new String(out, 0, outLen);
    }