/**     * 帶身份驗證的郵件要用到的一個類</p>     * 注意一定要繼承 Authenticator 類，并覆蓋 getPasswordAuthentication 方法     * <p>Title: </p>     * <p>Description: </p>     * <p>Copyright: Copyright (c) 2001</p>     * <p>Company: </p>     * @author unascribed     * @version 1.0     */    import javax.mail.*;    public class Email_Autherticatorbean extends javax.mail.Authenticator    {      private String m_username = null;      private String m_userpass = null;      public void setUsername(String username)      {        m_username = username;      }      public void setUserpass(String userpass)      {        m_userpass = userpass;      }      public Email_Autherticatorbean()      {        super();      }            public Email_Autherticatorbean(String username, String userpass)      {        super();        setUsername(username);        setUserpass(userpass);      }      //一定要有這個方法，它是在需要身份驗證時自動被調用的      public PasswordAuthentication getPasswordAuthentication()      {        return new PasswordAuthentication(m_username,m_userpass);      }    }