Java所有语言中特殊字符的正则表达式

Question

In my user input field, I want to allow a combination of certain special characters, letters and numbers. I should make sure that a regular expression pattern allows this set when typed from any language . Basically this regular expression that I have constructed, should support unicode representations also. How do I achieve this using Pattern class in Java?

Sample code that I tried is given here. But this does not cover letters/numbers in any other language apart from English.

private static final String ADDRESS_LINE_PATTERN = "[A-Za-z0-9,\\s#\\-.]+";


    public static boolean isInputValid(String patternToValidate, String input){
        Pattern p = Pattern.compile(patternToValidate);
        Matcher m = p.matcher(input);
        boolean b = m.matches();
        return b;

    }

public static void main(){
String value = "コロン";
System.out.println("Value:" + value + " - valid? " + isInputValid(ADDRESS_LINE_PATTERN, value));
}

Answer 1

You may use \\\\p{Alnum} to match any kind of letter or digit from any language.

 private static final String ADDRESS_LINE_PATTERN = "[\\p{Alnum},\\s#\\-.]+";

See Pattern javadoc for more info.

Answer 2

Normally, in Unicode aware regex engines, the word class \\w will
include all alpha-num's from any language.

You could use the negative of it \\W in a negative class [^\\W] , add whatever
you don't want _ , then OR it with special characters you do want.

(?U)(?:[^\W_]|[-,.+\s#])+ 

edit - re: @nhahtdh comment
Added Java (?U) inline modifier for UNICODE_CHARACTER_CLASS
(I assume correct)