Unicode 编码解码工具类

 /*** 字符串转 Unicode 编码（标准格式 \\uXXXX）*/

  public static String stringToUnicode(String str) {if (str == null || str.isEmpty()) {return "";}StringBuilder unicode = new StringBuilder();for (int i = 0; i < str.length(); i++) {char ch = str.charAt(i);// 对非ASCII字符进行编码if (ch > 127) {unicode.append("\\u").append(String.format("%04x", (int) ch).toUpperCase());} else {unicode.append(ch);}}return unicode.toString();}

    /*** Unicode 解码为字符串（标准格式 \\uXXXX）*/public static String unicodeToString(String unicodeStr) {if (unicodeStr == null || unicodeStr.isEmpty()) {return "";}Pattern pattern = Pattern.compile("(\\\\u[0-9a-fA-F]{4})");Matcher matcher = pattern.matcher(unicodeStr);StringBuffer sb = new StringBuffer();while (matcher.find()) {String unicode = matcher.group(1);char ch = (char) Integer.parseInt(unicode.substring(2), 16);matcher.appendReplacement(sb, String.valueOf(ch));}matcher.appendTail(sb);return sb.toString();}