Here you can find the source of sanitizeFileName(String name)
public static String sanitizeFileName(String name)
//package com.java2s; /* Copyright (C) 2011 Marius C. Silaghi Author: Marius Silaghi: msilaghi@fit.edu Florida Tech, Human Decision Support Systems Laboratory /*from ww w . j a va2 s . co m*/ This program is free software; you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation; either the current version of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ public class Main { public static String sanitizeFileName(String name) { String result = ""; if (name == null) return result; for (int k = 0; k < name.length(); k++) { char c = name.charAt(k); if (Character.isLetterOrDigit(c)) result += c; else result += "_"; } return result; } }