Export CSV with french or UTF-8 in Linux and Excel open it correctly with UTF-8

You may append the 3 bytes to the file before exporting, it works for me . Before doing that system only work in Windows and HP -UX but failed in Linux.

    FileOutputStream fStream = new FileOutputStream( f );
    final byte[] bom = new byte[] { (byte) 0xEF, (byte) 0xBB, (byte) 0xBF };
    OutputStreamWriter writer = new OutputStreamWriter( fStream, "UTF8" );
    fStream.write( bom );
    // writer to have your contents

Have a UTF-8 BOM (3 bytes, hex EF BB BF) at the start of the file. Otherwise Excel will interpret the data according to your locale's default encoding (e.g. cp1252) instead of utf-8