使用jsp发送电子邮件-Java 学习之路

我希望使用html表单在jsp中发送电子邮件，以获取值，来自主题，正文等 . 但此代码工作不正确 . 请帮我 . 谢谢

<%@ page import="java.io.*,java.util.*,javax.mail.*"%>
<%@ page import="javax.mail.internet.*,javax.activation.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*" %>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
        <link href="bootstrap.css" rel="stylesheet" type="text/css"/>
        <script src="bootstrap.js" type="text/javascript"></script>
        <link href="style.css" rel="stylesheet" type="text/css"/>
        <script src="jquery-3.1.1.js" type="text/javascript"></script>

    </head>
    <body style="background-color:lightgreen">
         <form class="form-group" style=" margin-right:200px; padding: 30px 0px 0 25px;  background-color:white">                     
             <p style="margin: -30px 0 10px  70px; font-size: 20px">Sending Email </p>
                <input type="email" class="form-control" placeholder="To" required name="to" style="width:300px" />

                <input type="email" class="form-control" placeholder="From" required name="from" style="width:300px" />

                <input type="text" class="form-control" placeholder="subject:" required name="subject" style="width:300px" />

                <textarea placeholder="body" required name="body" cols="32" rows="7" style="border:1px gray solid;border-radius:5px;"></textarea>

                <input type="submit" value="send" name="btn"   style="width: 300px; height: 35px; border: 1px solid gainsboro; border-radius: 4px; background-color:limegreen; color: white"/>


    <%
     String from = request.getParameter("from");
          String to = request.getParameter("to");
          String subject = request.getParameter("subject");
           String bod = request.getParameter("body");
      final String username = "muneeb";
      final String password = "******";
// Get system properties object
      String host = "smtp.gmail.com";

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

      // Get the Session object.
        Session session1 = Session.getInstance(props,
      new javax.mail.Authenticator() {
         protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
         }
      });

      try {
         // Create a default MimeMessage object.
         Message message = new MimeMessage(session1);

         // Set From: header field of the header.
         message.setFrom(new InternetAddress(from));

         // Set To: header field of the header.
         message.setRecipients(Message.RecipientType.TO,
         InternetAddress.parse(to));

         // Set Subject: header field
         message.setSubject(subject);

         // Now set the actual message
         message.setText(bod);
         // Send message
         Transport.send(message);

         System.out.println("Sent message successfully....");

      } catch (MessagingException e) {
             System.out.println(" faild message....");

      }
%>
    </div>
        </div>
</body>
</html>

它显示了这个错误：

org.apache.jasper.JasperException：在第132行129处理JSP页面/assignment3/send_email.jsp时发生异常：消息消息= new MimeMessage（session1）; 130：131：//设置From： Headers 的头字段 . 132：message.setFrom（new InternetAddress（from））; 133：134：//设置为： Headers 的 Headers 字段 . 135：message.setRecipients（Message.RecipientType.TO，Stacktrace：org.apache.jasper.servlet.JspServletWrapper.handleJspException（JspServletWrapper.java:584）org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:481） org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:385）org.apache.jasper.servlet.JspServlet.service（JspServlet.java:329）javax.servlet.http.HttpServlet.service（HttpServlet.java： 742）org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）

2 回答

0

您的JSP将被执行以显示表单，并且它将尝试在用户有机会输入任何内容之前发送电子邮件 .

你最好在servlet中移动java代码 .

回复于 2024-05-03T17:18:47+08:00

我想如果你在Servlet中这样做会更好 .

看那里我会给你一个基本的例子，它将从html表单获取参数并在servlet中工作，如：

`@WebServlet("/Servlet")
    public class Servlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public Servlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
     *      response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        response.setContentType("text/html");
        RequestDispatcher requestDispatcher;

        String from = request.getParameter("sender");
        String password = request.getParameter("pass");
        String to = request.getParameter("receiver");
        String subject = request.getParameter("subject");
        String message = request.getParameter("message");

        Properties properties = System.getProperties();
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.port", "587");

        if (from.contains("hotmail")) {
            properties.put("mail.smtp.host", "smtp.live.com");

        } else if (from.contains("gmail")) {
            properties.put("mail.smtp.host", "smtp.gmail.com");

        } else if (from.contains("yahoo")) {
            properties.put("mail.smtp.host", "smtp.mail.yahoo.com");

        } else {
            out.println("<h2 style='color:red;'>Unknown domain name!!</h2><br>"
                    + "<p>Please use 'Yahoo or Gmail or Hotmail'</p>");
        }

        Session messageSession = Session.getDefaultInstance(properties, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {

                return new PasswordAuthentication(from, password);
            }
        });

        try {
            MimeMessage mimeMessage = new MimeMessage(messageSession);
            mimeMessage.setFrom(new InternetAddress(from));
            mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
            mimeMessage.setSubject(subject);
            mimeMessage.setText(message);

            Transport.send(mimeMessage);
            requestDispatcher = request.getRequestDispatcher("index.html");
            requestDispatcher.forward(request, response);
            out.println("<h2 style='color:green;'>Message sended successfully.</h2><br>" + "<p>Welldone.</p>");

        } catch (MessagingException e) {
            requestDispatcher = request.getRequestDispatcher("index.html");
            out.println("<h2 style='color:red;'>Fatal Error!!</h2><br>" + "<p>" + e.getMessage() + "</p>");
        }

    }

}
`

和基本的HTML表单：

<body>
<h1 align="center">Send Email Form</h1>
<form class="cf" action="Servlet" method="post">
    <div align="center">
        <table>
            <tr>
                <td>From : </td><td><input type="email" name="sender" size="30px" class="input-email"
                    placeholder="Email address"></td>
            </tr>
            <tr>
                <td>Password : </td><td><input type="password" name="pass" size="30px" class="input-email"
                    placeholder="Sender Password"></td>
            </tr>
            <tr>
                <td>To : </td><td><input type="email" name="receiver" size="30px" class="input-email"
                    placeholder="Email address"></td>
            </tr>
            <tr>
                <td>Subject : </td><td><input type="text" name="subject" size="30px" class="input-email"
                    placeholder="Subject"></td>
            </tr>
            <tr>
                <td>Message : </td><td><textarea name="message" id="input-message"
                        class="text" placeholder="Message"></textarea></td>
            </tr>
            <tr>
                <td><input type="submit" value="SEND" class="button">
                </td>
                <td><input type="reset" value="CLEAR" class="button">
                </td>
            </tr>
        </table>
    </div>

</form>

我希望这对你有帮助 .

回复于 2024-05-03T17:18:47+08:00

使用jsp发送电子邮件

2 回答

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