为什么我不能从我的servlet发送电子邮件并获取java.security.AccessControlException？ [英] Why can't i send email from my servlet and getting java.security.AccessControlException?

问题描述

可能存在重复：

为什么我不能从我的servlet发送电子邮件？

我正在使用谷歌应用程序引擎。我想从我的servlet发送电子邮件。我使用以下代码：

I am using google app engine. I want to send email from my servlet. i am using following code:

 String to[] = {"[e-mail]"};
            String host = "smtp.gmail.com";
            String username = "[e-mail]";
            String password = "password";
            Properties props = new Properties();
            props.put("mail.smtps.auth", "true");
            props.put("mail.smtp.starttls.enable", "true");
            props.put("mail.smtp.host", host);
            props.put("mail.smtp.user", username);
            props.put("mail.smtp.password", password);
            props.put("mail.smtp.port", "587");
            props.put("mail.smtp.auth", "true");
            // ...
            Session session = Session.getInstance(props);
            MimeMessage msg = new MimeMessage(session);
            // set the message content here
            msg.setFrom(new InternetAddress(username,"Me"));
            msg.setSubject("Testing");
            msg.setText("Testing...");
            Address[] addresses = new Address[to.length];
            for (int i = 0; i < to.length; i++) {
                Address address = new InternetAddress(to[i]);               
                addresses[i] = address;
                // Add the given addresses to the specified recipient type.
                msg.addRecipient(Message.RecipientType.TO, new InternetAddress(to[i]));
            } 

            Transport t = session.getTransport("smtps");

            t.connect(host, username, password);
            t.sendMessage(msg, msg.getAllRecipients());
            t.close();

但是我收到以下异常：

 Exception error: java.security.AccessControlException: access denied (java.net.SocketPermission smtp.gmail.com resolve)

以下是我的servlet的所有导入：

Following are all imports of my servlet:

  import java.io.IOException;
  import java.io.PrintWriter;
  import java.util.List;
  import java.util.Properties;

  import javax.mail.Address;
  import javax.mail.BodyPart;
  import javax.mail.Message;
  import javax.mail.Multipart;
  import javax.mail.Session;
  import javax.mail.Transport;
  import javax.mail.internet.InternetAddress;
  import javax.mail.internet.MimeBodyPart;
  import javax.mail.internet.MimeMessage;
  import javax.mail.internet.MimeMultipart;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;

有谁可以告诉我最新的问题？

Can anybody tell me whats the problem? Thanks in advance.

推荐答案

设置以下属性

        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", username);
        props.put("mail.smtp.password", password);
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");

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