使用java servlet發送電子郵件時顯示錯誤？

Question

使用servlet發送郵件時出現錯誤（在eclispe中）。我還在我的類路徑中包含mail.jar和activation.jar。

我的servlet代碼看起來像

import java.util.Properties; 
import javax.mail.Message; 
import javax.mail.MessagingException; 
import javax.mail.PasswordAuthentication; 
import javax.mail.Session; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage; 
import javax.servlet.RequestDispatcher; 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
import javax.servlet.http.HttpSession; 
public class Controller extends HttpServlet 
{ 
    private static final long serialVersionUID = 1L; 
    public Controller() { 
     super(); 
    } 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ 
     doProcess(request,response); 
    } 
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ 
     doProcess(request,response); 
    } 
    protected void doProcess(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
    { 
     final String user = request.getParameter("email"); 
     final String pwd = request.getParameter("pwd"); 
     String sub = request.getParameter("subject"); 
     String body = request.getParameter("msg"); 
     String to = "shiladitya1093@gmail.com"; 

     //Get the session object 
     Properties props = new Properties(); 
     props.put("mail.smtp.host","localhost"); 
     props.put("mail.smtp.auth","true"); 
     Session session = Session.getDefaultInstance(props, 
       new javax.mail.Authenticator() { 
        protected PasswordAuthentication getPasswordAuthentication() { 
        return new PasswordAuthentication(user,pwd); 
        } 
       }); 

     //Compose message 
     try{ 
      MimeMessage message = new MimeMessage(session); 
      message.setFrom(new InternetAddress(user)); 
      message.addRecipient(Message.RecipientType.TO, new InternetAddress(to)); 
      message.setSubject(sub); 
      message.setText(body); 

     //Send message 
      Transport.send(message); 
     }catch(MessagingException e){ 
      throw new RuntimeException(e); 
     } 

     request.setAttribute("sendMsg","Message successfully send."); 
     RequestDispatcher rd = request.getRequestDispatcher("contactus.jsp"); 
     rd.forward(request, response); 
    } 
} 

和錯誤是這樣的：

HTTP狀態500 - javax.mail.AuthenticationFailedException：535沒有定義SMTP服務器。在您的帳戶中使用真實的服務器地址而不是127.0.0.1。

Answer 1

您可以檢查以下內容。 1）您的SMTP服務器是否在本地機器上配置。 2）嘗試使用計算機的計算機名稱或IP地址來發送郵件，而不是本地主機。

此外，請提供一些關於您的郵件預期目標的詳細信息（例如，此郵件意圖在何處發送）。基於此，您可能會得到更好的迴應。