Question

我写了一个简单的程序来发送电子邮件。 servlet程序和JSP代码如下。我在jsp页面中收到以下错误消息。我正在使用glassfish服务器。我已将以下jar文件添加到我的类路径中。

LIB /的mail.jar
LIB / dsn.jar
LIB / imap.jar
LIB / mailapi.jar和
LIB / pop3.jar
LIB / smtp.jar
LIB /没有activation.jar

我在Windows 7平台上工作并使用netbeans IDE。

发件人电子邮件地址= someone@mohp.gov.np 收件人电子邮件id = someone@gmail.com

错误消息

Couldn't connect to host, port: localhost, 25; timeout -1

doPOST（）方法中的SERVLET CODE

String err="";

        //reciever email ID
//reciever email id=someone@gmail.com
        String to=request.getParameter("reciever");

        //sender emai ID
//sender email id=someone@mohp.gov.np

        String from=request.getParameter("sender");

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

        //Subject of the email;
        String sub=request.getParameter("subject");

        //message of the email
        String msg=request.getParameter("message");

        //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);

        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:
            message.setSubject(sub);

            //set message:
            message.setText(msg);

            //Send message

            Transport.send(message);


        }catch (MessagingException mex) {
            mex.printStackTrace();
            err=mex.getMessage();
        }

        request.setAttribute("err", err);
        RequestDispatcher rd=request.getRequestDispatcher("/newjsp.jsp");
        rd.forward(request, response);

JSP CODE（index.jsp）

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <link rel="stylesheet" href="css/email.css" type="text/css">
        <title>E-Mail</title>
    </head>
    <body>
        <form action="EMail" method="post" name="myform">
            <table border="1" width="100%" height="600px" cell-padding="0">
                <tr>
                    <td><table>
                    <tr height="30px">
                        <td width="5%" align="left">From :</td>
                        <td width="80%"><input type="text" name="sender" value="" size="80" /></td>
                    </tr>

                    <tr height="30px">
                        <td width="5%">To :</td>
                        <td width="80%"><input type="text" name="reciever" value="" size="80" /></td>
                    </tr>

                    <tr height="30px">
                        <td width="5%">Subject :</td>
                        <td width="80%"><input type="text" name="subject" size="100" /></td>
                    </tr>

                    <tr height="30px">
                        <td width="5%">Message :<br></td>
                    </tr>
                    <tr>
                    <table>
                        <tr height="30px">
                            <td width="5%"><textarea name="message" rows="20" cols="85"></textarea>"</td>
                        </tr>
                    </table>
                    </tr>
                    <tr>
                        <td><input type="Submit" value="Send"</td>
                    </tr>
                </table></td>
                </tr>
            </table>
        </form>
    </body>
</html>

JSP CODE（newjsp.jsp）

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <h1>Hello World!</h1>
        ${err}
    </body>
</html>

Answer 1

我认为您没有设置所有强制属性来发送电子邮件，而mail.smpts.host是端口号。请将localhost更改为465，请检查以下属性是否在您的代码中

属性props = new Properties（）;

props.put("mail.transport.protocol", "smtps");
props.put("mail.smtps.host", 465);
props.put("mail.smtps.auth", "true");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class",
        "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.quitwait", "false");

Answer 2

您必须将电子邮件身份验证凭据设置为会话对象。请使用以下代码设置身份验证凭据

 Session mailSession = Session.getDefaultInstance(props,
                new javax.mail.Authenticator() {
                    @Override
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication("yourmail@gmail.com", "yourpassword");
                    }
                });
        mailSession.setDebug(true);
        Transport transport = mailSession.getTransport();

        MimeMessage message = new MimeMessage(mailSession);
        message.setSubject(subject);
        message.setContent(content, "text/html");

        message.addRecipient(Message.RecipientType.TO,
                new InternetAddress(emailid));

        transport.connect(SMTP_HOST_NAME, SMTP_HOST_PORT, "yourmail@gmail.com", "yourpassword");

        transport.sendMessage(message,
                message.getRecipients(Message.RecipientType.TO));

        transport.close();

它应该有用。

配置localhost以使用servlet发送电子邮件

错误消息

doPOST（）方法中的SERVLET CODE

JSP CODE（index.jsp）

JSP CODE（newjsp.jsp）

2 个答案: