请教java邮件验证问题,在线等

Question

……
Session sess = Session.getInstance(props, (Authenticator) new MailAuth(userid, passwd));
……
Transport trans = sess.getTransport("smtp");
Transport.send(mess);
trans.close();//--------------------
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
public class MailAuth extends Authenticator {
private String mUser;
private String mPass;
public MailAuth() {
}
public MailAuth(String username, String password) {
super();
mUser = username;
mPass = password;
}
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(mUser, mPass);
}
}

Answer 1

package   com.wjg.email;   
    
  import   javax.mail.*;   
  import   javax.mail.internet.*;   
  import   java.util.Properties;   
  import   java.util.*;   
    
  /**   
    *   @author   wjg   
    *   
    *   发送邮件简单类   
    */   
  public   class   SendMail   {   
          String   host;   //smtp服务器地址   
    
          String   from;   //发送邮箱地址   
    
          String   username   =   null;   //smtp用户名   
    
          String   password   =   null;   //smtp用户密码   
    
          public   void   setHost(String   host)   {   
                  this.host   =   host;   
          }   
    
          public   String   getHost()   {   
                  return   this.host;   
          }   
    
          public   void   setFrom(String   from)   {   
                  this.from   =   from;   
          }   
    
          public   String   getFrom()   {   
                  return   this.from;   
          }   
    
          public   void   setUsername(String   username)   {   
                  this.username   =   username;   
          }   
    
          public   String   getUsername()   {   
                  return   this.username;   
          }   
    
          public   void   setPassword(String   password)   {   
                  this.password   =   password;   
          }   
    
          public   String   getPassword()   {   
                  return   this.password;   
          }   
          /**   
            *   发送邮件到指定邮箱;调用前要设置host属性，   
            *   需要验证则设置用户名和密码,不支持附件   
            *     
            *   @param   sendto   发送目标邮箱   
            *   @param   subject   //邮件主题   
            *   @param   content   //邮件内容，可以含html   
            */   
          public   void   sendMail(String   sendto,   String   subject,   String   content)   {   
                  Authenticator   mailAuth   =   null;   
                  Properties   props   =   new   Properties();   
                  props.put("mail.smtp.host",   host);   
                  if   (this.username   !=   null)   {   
                          mailAuth   =   new   EmailAuthenticator(username,   password);   
                          props.put("mail.smtp.auth",   "true");   
                  }   
                  Session   session   =   Session.getInstance(props,   mailAuth);   
    
                  MimeMessage   message   =   new   MimeMessage(session);   
                  try   {   
                          message.setFrom(new   InternetAddress(from));   
                          message.setRecipient(Message.RecipientType.TO,   new   InternetAddress(   
                                          sendto));   
                          message.setSubject(subject);   
                          message.setSentDate(new   Date());   
                          message.setContent(content,   "text/html");   
                          message.saveChanges();   
                          Transport   transport   =   session.getTransport("smtp");   
                          transport.connect(host,   username,   password);   
                          transport.sendMessage(message,   message.getAllRecipients());   
                          transport.close();   
                  }   catch   (Exception   e)   {   
                          e.printStackTrace();   
                  }   
    
          }   
  };

Answer 2

package   com.wjg.email;   
    
  import   javax.mail.Authenticator;   
  import   javax.mail.*;   
    
  public   class   EmailAuthenticator   
          extends   Authenticator   {   
    
      String   username   =   null;   
      String   password   =   null;   
    
      public   EmailAuthenticator()   {   
      super();   
      }   
      public   EmailAuthenticator(String   username,String   password)   {   
      super();   
      this.username=username;   
      this.password=password;   
      }   
      public   PasswordAuthentication   performCheck(String   user,   String   pass)   {   
          username   =   user;   
          password   =   pass;   
          return   getPasswordAuthentication();   
      }   
    
      protected   PasswordAuthentication   getPasswordAuthentication()   {   
          return   new   PasswordAuthentication(username,   password);   
      }   
    
  }  
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