mailutils.java

Java Mail Server JAVA编写的邮件服务器

/****************************************************************
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.     *
 *                                                              *
 * Copyright 2008 Jun Li(SiChuan University, the School of      *
 * Software Engineering). All rights reserved.                  *
 *                                                              *
 * Licensed to the JMS under one  or more contributor license   *
 * agreements.  See the LICENCE file  distributed with this     *
 * work for additional information regarding copyright          *
 * ownership.  The JMS licenses this file  you may not use this *
 * file except in compliance  with the License.                 *
 *                                                              *
 * Unless required by applicable law or agreed to in writing,   *
 * software distributed under the License is distributed on an  *
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
 * KIND, either express or implied.  See the License for the    *
 * specific language governing permissions and limitations      *
 * under the License.                                           *
 ****************************************************************/
package org.jpxx.mail.Util;

import java.util.Random;

/**
 * The class <code>MailUtils</code> give some popular operations about mail.
 * 
 * @author Jun Li
 * @version $Revision: 0.0.1 $, $Date: 2008/04/29 $
 * @since JMS 0.0.1
 * 
 */
public class MailUtils {

    /**
     * Get a unique ID. It will be used in POP3 protocol. (APOP command)
     * @return a unique ID
     */
    public static String getID() {
        Random random = new Random();
        int ran = random.nextInt(100000);

        if (ran < 10000) {
            ran += 10000;
        }

        String str = ran + "." + System.currentTimeMillis();
        return str;
    }
}