无法使用 java 邮件 api 从 jsp webapp 发送邮件

Question

我想在给定的 jsp 页面执行时发送一封邮件。我包含了 java 邮件 jar 文件和 java 激活框架 jar 文件。但是此代码给出了未指定密码的错误，而我提供了正确的密码，如下面的代码所示。任何帮助将不胜感激！ JSP.

完全陌生

   <%@page contentType="text/html" pageEncoding="UTF-8"%>
     <!DOCTYPE html>
   <%@ page import = "java.io.*,java.util.*,javax.mail.*"%>
   <%@ page import = "javax.mail.internet.*,javax.activation.*"%>
   <%@ page import = "javax.servlet.http.*,javax.servlet.*" %>

   <%
   String result;

   // Recipient's email ID needs to be mentioned.
   String to = "xzu@gmail.com";

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

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

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

    // Setup mail server
    properties.setProperty("mail.user", "xzu@gmail.com");
    properties.setProperty("mail.password", "xzu");
    properties.setProperty("mail.smtp.host", host);

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

   try {
  // Create a default MimeMessage object.
  MimeMessage message = new MimeMessage(mailSession);

  // 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
  message.setSubject("This is the Subject Line!");

  // Now set the actual message
  message.setText("This is actual message");

  // Send message
  Transport.send(message);
  result = "Sent message successfully....";
  } catch (MessagingException mex) {
  mex.printStackTrace();
  result = mex.getMessage();
  }
  %>

  <html>
  <head>
  <title>Send Email using JSP</title>
  </head>

   <body>
  <center>
     <h1>Send Email using JSP</h1>
  </center>

  <p align = "center">
     <% 
        out.println("Result: " + result + "\n");
     %>
  </p>
  </body>
  </html>

Answer 1

我假设您的计算机上没有邮件服务器运行，您尝试使用 google...

发送电子邮件

那么host=localhost是错误的。

为此，您需要类似的东西：

final String username = "xyz@gmail.com";
final String password = "password";

Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");

然后创建会话

Session session = Session.getInstance(props,
  new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }
  });

然后通过以下方式发送您的电子邮件：

Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse(to));
message.setSubject(subject);
message.setText(messageText);
Transport.send(message);

无法使用 java 邮件 api 从 jsp webapp 发送邮件

unable to send mail from a jsp webapp using java mail api

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jsp

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