Is there a cross-platform Java method to remove filename special chars?

Question

I\'m making a cross-platform application that renames files based on data retrieved online. I\'d like to sanitize the Strings I took from a web API for the current platform.

Answer 1

or just do this:

String filename = "A20/B22b#öA\\BC#Ä$%ld_ma.la.xps";
String sane = filename.replaceAll("[^a-zA-Z0-9\\._]+", "_");

Result: A20_B22b_A_BC_ld_ma.la.xps

Explanation:

[a-zA-Z0-9\\._] matches a letter from a-z lower or uppercase, numbers, dots and underscores

[^a-zA-Z0-9\\._] is the inverse. i.e. all characters which do not match the first expression

[^a-zA-Z0-9\\._]+ is a sequence of characters which do not match the first expression

So every sequence of characters which does not consist of characters from a-z, 0-9 or . _ will be replaced.

Answer 2

Here is the code I use:

public static String sanitizeName( String name ) {
    if( null == name ) {
        return "";
    }

    if( SystemUtils.IS_OS_LINUX ) {
        return name.replaceAll( "[\u0000/]+", "" ).trim();
    }

    return name.replaceAll( "[\u0000-\u001f<>:\"/\\\\|?*\u007f]+", "" ).trim();
}

SystemUtils is from Apache commons-lang3