如何替换Java中不可打印的Unicode字符？
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以下将替换ASCII控制字符（
[\\x00-\\x1F\\x7F]
my_string.replaceAll(\"\\\\p{Cntrl}\", \"?\");
[\\p{Graph}\\x20]my_string.replaceAll(\"[^\\\\p{Print}]\", \"?\");
没有找到相关结果
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踩什不
my_string.replaceAll(\"\\\\p{C}\", \"?\");/支持它们。骨酚柯
myString.replaceAll(\"\\\\p{C}\", \"?\");可能包含非BMP码点，那么它会更加复杂。 “ 9”包含代理代码点“ 10”。上面的替换方法通过有时仅替换代理对的一半来破坏非BMP代码点。这可能是Java错误，而不是预期的行为。 使用其他组成类别是一种选择：myString.replaceAll(\"[\\\\p{Cc}\\\\p{Cf}\\\\p{Co}\\\\p{Cn}]\", \"?\");StringBuilder newString = new StringBuilder(myString.length()); for (int offset = 0; offset < myString.length();) { int codePoint = myString.codePointAt(offset); offset += Character.charCount(codePoint); // Replace invisible control characters and unused code points switch (Character.getType(codePoint)) { case Character.CONTROL: // \\p{Cc} case Character.FORMAT: // \\p{Cf} case Character.PRIVATE_USE: // \\p{Co} case Character.SURROGATE: // \\p{Cs} case Character.UNASSIGNED: // \\p{Cn} newString.append(\'?\'); break; default: newString.append(Character.toChars(codePoint)); break; } }旦彤
\\p{Cc}\\p{Cf}凸晴
public static String removeNonAscii(String str) { return str.replaceAll(\"[^\\\\x00-\\\\x7F]\", \"\"); } public static String removeNonPrintable(String str) // All Control Char { return str.replaceAll(\"[\\\\p{C}]\", \"\"); } public static String removeSomeControlChar(String str) // Some Control Char { return str.replaceAll(\"[\\\\p{Cntrl}\\\\p{Cc}\\\\p{Cf}\\\\p{Co}\\\\p{Cn}]\", \"\"); } public static String removeFullControlChar(String str) { return removeNonPrintable(str).replaceAll(\"[\\\\r\\\\n\\\\t]\", \"\"); }捻盒愧杯
private static Pattern pattern = Pattern.compile(\"[^ -~]\"); private static String cleanTheText(String text) { Matcher matcher = pattern.matcher(text); if ( matcher.find() ) { text = text.replace(matcher.group(0), \"\"); } return text; }雄鞋谋塘
myString.trim.replaceAll(\"\\r\\n\", \"\\n\").replaceAll(\"\\r\", \"\\n\").replaceAll(\"[\\\\p{Cc}\\\\p{Cf}\\\\p{Co}\\\\p{Cn}&&[^\\\\s]]\", \"\")bab
private String removeNonBMPCharacters(final String input) { StringBuilder strBuilder = new StringBuilder(); input.codePoints().forEach((i) -> { if (Character.isSupplementaryCodePoint(i)) { strBuilder.append(\"?\"); } else { strBuilder.append(Character.toChars(i)); } }); return strBuilder.toString(); }掀辟髓观粟
public static String stripNonDigitsV2( CharSequence input ) { if (input == null) return null; if ( input.length() == 0 ) return \"\"; char[] result = new char[input.length()]; int cursor = 0; CharBuffer buffer = CharBuffer.wrap( input ); int i=0; while ( i< buffer.length() ) { //buffer.hasRemaining() char chr = buffer.get(i); if (chr==\'u\'){ i=i+5; chr=buffer.get(i); } if ( chr > 39 && chr < 58 ) result[cursor++] = chr; i=i+1; } return new String( result, 0, cursor ); }