javamail API中的SMTP身份验证问题 [英] SMTP authentication issue in javamail API

问题描述

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.mail.event.*;
import java.net.*;
import java.util.*;
public class servletmail extends HttpServlet
{
public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
{
PrintWriter out=response.getWriter();
response.setContentType("text/html");
try
{
Properties props=new Properties();
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.host","smtp.gmail.com");
props.put("mail.smtp.port", "25");
props.put("mail.smtp.auth", "true");
Authenticator authenticator = new Authenticator()
    {
    protected PasswordAuthentication getPasswordAuthentication() 
        {
        return new PasswordAuthentication("user", "pass");
    }
};
Session sess=Session.getDefaultInstance(props,authenticator);
Message msg=new MimeMessage(sess);
msg.setFrom(new InternetAddress("[e-mail]"));
msg.addRecipient(Message.RecipientType.TO, new InternetAddress("[e-mail]"));
msg.setSubject("Hello JavaMail");
msg.setText("Welcome to JavaMail");
Transport.send(msg);
out.println("mail has been sent");
}
catch(Exception e)
{
System.out.println("err"+e);
}
}
}

我正在与上述错误一起工作

im working with above im gettin d following error

servletmail.java:22: reference to Authenticator is ambiguous, both class java.ne
t.Authenticator in java.net and class javax.mail.Authenticator in javax.mail mat
ch
Authenticator authenticator = new Authenticator()
^
servletmail.java:22: reference to Authenticator is ambiguous, both class java.ne
t.Authenticator in java.net and class javax.mail.Authenticator in javax.mail mat
ch
Authenticator authenticator = new Authenticator()
                                  ^
2 errors

我遵循了

http://java.sun.com/developer/onlineTraining/JavaMail/contents.html

我应该如何获得输出..上面的代码会工作吗? 使用雷鸟smtp服务器需要进行哪些更改..im

how should i get the output..will the above code...work what are the changes that need to be made..im using thunderbird smtp server

推荐答案

该错误表明存在两个可能在其中引用的Authenticator类-错误所指的是java.net.Authenticator and javax.mail.Authenticator.

The error indicates that there are two possible Authenticator classes which are being referenced here - namely java.net.Authenticator and javax.mail.Authenticator as the error says.

这是因为您已经导入了java.net.*和javax.mail.*，并且编译器不知道您需要哪个Authenticator.

This is because you have imported java.net.* and javax.mail.* and the compiler does not know which Authenticator you need.

通过显式导入解决此问题

Fix this by explicitly importing

import javax.mail.Authenticator;

OR 将第22行的Authenticator限定为

OR qualify the Authenticator on line 22 as

javax.mail.Authenticator authenticator = new javax.mail.Authenticator()

---

更新

由于您在发送邮件时遇到问题，请首先检查您的网络管理员是否已授予您通过gmail连接到smtpserver的权限.您是代理人吗?

Since you are having problems with sending the mail, first check whether your network admins have given you permissions to connect to the smtpserver at gmail. Are you behind a proxy?

创建sess后，将此行添加到代码中:sess.setDebug(true);

After creating sess, add this line to the code: sess.setDebug(true);

看看消息，看看你能走多远.

Look at the messages and see how far you get.

尝试以下提供的其他调试技巧: http://java.sun .com/products/javamail/FAQ.html#debug

Try the other debug tips given at: http://java.sun.com/products/javamail/FAQ.html#debug

更新2

我尝试运行您的代码，它对我有用，包括发送电子邮件. 我必须为道具添加一行

I've tried running your code and it works for me including sending the email. I had to add one line for props

props.put("mail.smtp.starttls.enable","true");

当然，请将此return new PasswordAuthentication("user", "pass");更改为您的实际用户名/密码. 然后将"[e-mail]"添加到您的实际电子邮件ID.

And of course, change this return new PasswordAuthentication("user", "pass"); to your actual username/password. And "[e-mail]" to your actual email id.

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