java.util.regex.PatternSyntaxException: Illegal character range near index 71

Question

[^\u0009\u000A\u000D\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF]

The above line showing illegal character range exception. Can anyone please help me.

if i use the above line in java code directly, it is not showing any error.

Pattern xmlInvalidChars = Pattern.compile("[^\\u0009\\u000A\\u000D\\u0020-\\uD7FF\\uE000-\\uFFFD\uD800\uDC00-\uDBFF\uDFFF]");

But if get the string from configuration xml file and use in the java code, it is showing error.

String chars = ConfigLoader.getInstance().getInvalidCharacters();
Pattern xmlInvalidChars = Pattern.compile(chars);

The problem is with \uDC00-\uDBFF, this range is out of order. What do you need to match with the pattern? Maybe you need to remove the hyphen to remove the faulty range? Also, you need single backslashes in the XML. — Wiktor Stribiżew
– Wiktor Stribiżew, Commented May 25, 2017 at 13:28
As @WiktorStribiżew said, refer to en.wikipedia.org/wiki/UTF-8#Invalid_code_points — Simon
– Simon, Commented May 25, 2017 at 17:24

Leonardo Pina · Accepted Answer · 2017-05-25 12:48:53Z

1

I can't comment yet, so I'll post as an answer. inside your string you have loose backslashes \uD800\uDC00-\uDBFF\uDFFF, therefore, it is treating \uas and escape character, however it is not. just add double backslashes as the rest of your regex.

Edit: Before compiling the pattern, try to substitute single slashes with double slashes.

chars = chars.replace("\\","\\\\");

edited May 25, 2017 at 12:48

answered May 25, 2017 at 11:51

Leonardo Pina

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2 Comments

Gopinath Over a year ago

it is not working...Actually I am using this Pattern to wrap up the invalid character present in the incoming xml file with CDATA. But this solution not working...

Leonardo Pina Over a year ago

hmm, maybe it is because it is loading the literal string from the file? you could try replacing single slashes in your xml file for double backslashes. or try replacing it inside java. editing my answer accordingly.

Gopinath · Accepted Answer · 2017-06-01 06:59:42Z

0

I used the below line in configuration xml file.

 [^\\u0009\\u000A\\u000D\\u0020-\\uD7FF\\uE000-\\uFFFD\uD800\\uDC00-\\uDBFF\uDFFF]

that is i used the reverse case. i changed the single slash to double slash(\ to \) and double slash to single slash(\ to ). It is working now.

answered Jun 1, 2017 at 6:59

Gopinath

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