Question

我正在尝试使用java mail api并在我的servlet中使用以下代码来发送邮件。我找不到解决错误的方法。

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        // Recipient's email ID needs to be mentioned.
          String to = "xyz@gmail.com";

          // Sender's email ID needs to be mentioned
          String from = "abc.com";

          // Assuming you are sending email from localhost
          String host = "localhost";

          // Get system properties
          Properties properties = System.getProperties();

          // Setup mail server
          properties.setProperty("mail.smtp.host", host);

          // Get the default Session object.
          Session session = Session.getDefaultInstance(properties);

          // Set response content type
          response.setContentType("text/html");
          PrintWriter out = response.getWriter();

          try{
             // Create a default MimeMessage object.
             MimeMessage message = new MimeMessage(session);
             // Set From: header field of the header.
             message.setFrom(new InternetAddress(from));
             // Set To: header field of the header.
             message.addRecipient(Message.RecipientType.TO,
                                      new InternetAddress(to));
             // Set Subject: header field
             String subject=request.getParameter("subject");
             String content=request.getParameter("mail");


             message.setSubject(subject);
             // Now set the actual message
             message.setText(content);
             // Send message
             Transport.send(message);
             String title = "Send Email";
             String res = "Sent message successfully....";
             String docType =
             "<!doctype html public \"-//w3c//dtd html 4.0 " +
             "transitional//en\">\n";
             out.println(docType +
             "<html>\n" +
             "<head><title>" + title + "</title></head>\n" +
             "<body bgcolor=\"#f0f0f0\">\n" +
             "<h1 align=\"center\">" + title + "</h1>\n" +
             "<p align=\"center\">" + res + "</p>\n" +
             "</body></html>");
          }catch (MessagingException mex) {
             mex.printStackTrace();
          }

    }

我在控制台中收到以下错误：

引起：java.net.ConnectException：连接被拒绝：连接在 java.net.DualStackPlainSocketImpl.connect0（Native Method）at java.net.DualStackPlainSocketImpl.socketConnect（未知来源）at java.net.AbstractPlainSocketImpl.doConnect（未知来源）at java.net.AbstractPlainSocketImpl.connectToAddress（未知来源）at java.net.AbstractPlainSocketImpl.connect（未知来源）at java.net.PlainSocketImpl.connect（未知来源）at java.net.SocksSocketImpl.connect（未知来源）at java.net.Socket.connect（未知来源）at java.net.Socket.connect（未知来源）at com.sun.mail.util.SocketFetcher.createSocket（SocketFetcher.java:312）在com.sun.mail.util.SocketFetcher.getSocket（SocketFetcher.java:236）在 com.sun.mail.smtp.SMTPTransport.openServer（SMTPTransport.java:2019） ... 29更多

Answer 1

您没有在localhost上运行SMTP服务器，并且您告诉API使用localhost作为您的邮件服务器。

您需要安装本地SMTP服务器，或将smtp主机名设置为您有权访问的服务器，例如：

      String host = "smtp.yourisp.com"; // real server name required here

      // Get system properties
      Properties properties = System.getProperties();

      // Setup mail server
      properties.setProperty("mail.smtp.host", host);

Answer 2

哟需要在本地机器上安装smtp服务器或使用一些现有的smtp服务器（如雅虎，gmail等。你可以在互联网上获得smtp设置）。您可以使用apache james服务器并知道发送api的邮件。

“java.net.connectException”显示连接被拒绝

2 个答案: