Java tutorial
/* * Validators.java * * Copyright (C) 2012-2014 LucasEasedUp * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 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 General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package io.github.lucaseasedup.logit.util; import java.util.regex.Pattern; import org.apache.commons.lang.StringUtils; import org.apache.http.conn.util.InetAddressUtils; public final class Validators { private Validators() { } public static boolean validateEmail(String email) { if (StringUtils.isBlank(email)) return false; return EMAIL_PATTERN.matcher(email).matches(); } public static boolean validateIp(String ip) { if (StringUtils.isBlank(ip)) return false; return InetAddressUtils.isIPv4Address(ip) || InetAddressUtils.isIPv6Address(ip); } public static final Pattern EMAIL_PATTERN = Pattern.compile( "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@" + "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$"); }