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java - "java.net.connectionException"显示连接被拒绝

转载 作者：行者123 更新时间：2023-11-29 05:23:43 26 4
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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();
          }

    }

我的控制台出现以下错误:

Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:312) at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:236) at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2019) ... 29 more

最佳答案

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，或者将 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);

关于java - "java.net.connectionException"显示连接被拒绝，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23590320/

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