执行下面提到的代码时，我收到错误javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful.虽然用户名和密码是正确的，我使用了mail.jar和`activation.jar。我正在使用eclipse来运行这个程序，我想要在gmail.pls发送邮件帮助我。谢谢。
index.html
<!DOCTYPE html>
<html>
<head>
<title>Sending Mail Through JSP</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width">
</head>
<body bgcolor="khaki">
<form action="maildemo.jsp">
<table>
<tr><td><b><font color="red">To:
</td>
<td><b><b><input type="text" name="mail" value="Enter receiver mail-id"/><br/>
</td>
</tr>
<tr>
<td>
<b><font color="red">Subject:
</td>
<td>
<input type="text" name="sub" value="Enter Subject Line"><br/>
</td>
</tr>
<tr>
<td>
<b><font color="red">Message Text:
</td>
<td>
<textarea rows="12" cols="80" name="mess"></textarea><br/>
</td>
</tr>
<tr>
<td>
<input type="submit" value="Send">
</td>
<td>
<input type="reset" value="Reset">
</td>
</tr>
</table>
</form>
</body>
</html>
maildemo.jsp
<%@ page import="java.io.*,java.util.*,javax.mail.*,javax.mail.Service"%>
<%@ page import="javax.mail.internet.*,javax.activation.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*"%>
<%
//Creating a result for getting status that messsage is delivered or not!
String result;
// Get recipient's email-ID, message & subject-line from index.html page
final String to = request.getParameter("mail");
final String subject = request.getParameter("sub");
final String messg = request.getParameter("mess");
// Sender's email ID and password needs to be mentioned
final String from = "username";
final String pass = "password";
// Defining the gmail host
String host = "smtp.gmail.com";
// Creating Properties object
Properties props = new Properties();
// Defining properties
props.put("mail.smtp.host", host);
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.auth", "true");
props.put("mail.user", from);
props.put("mail.password", pass);
props.put("mail.smtp.port", "465");
props.put("mail.smtp.socketFactory.port", "465");//465
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
// Authorized the Session object.
Session mailSession = Session.getInstance(props, new javax.mail.Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(from, pass);
}
});
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(subject);
// Now set the actual message
message.setText(messg);
// Send message
Transport trans = mailSession.getTransport("smtp");
trans.send(message);
System.out.println("Sent message successfully....");
trans.close();
result = "Your mail sent successfully....";
} catch (MessagingException mex)
{
mex.printStackTrace();
result = "Error: unable to send mail....";
}
%>
<title>Sending Mail in JSP</title>
<h1>
<center>
<font color="blue">Sending Mail Using JSP</font>
</h1>
<b><center>
<font color="red"> <% out.println(result);%>
</b>