相关疑难解决方法(0)

我正在尝试使用Java发送电子邮件:

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

public class SendEmail {

   public static void main(String [] args) {

      // Recipient's email ID needs to be mentioned.
      String to = "abcd@gmail.com";

      // Sender's email ID needs to be mentioned
      String from = "web@gmail.com";

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

      // 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); …

以下是我发送电子邮件的代码:

    Properties props = new Properties();
    props.put("mail.smtp.host", host);
    props.put("mail.debug", "false");

    final Session session = Session.getInstance(props);
    final Message msg = new MimeMessage(session);
    msg.setFrom(new InternetAddress(from));
    msg.setRecipients(Message.RecipientType.TO, toAddress);
    msg.setSubject(subject);
    msg.setSentDate(new Date());
    Multipart multipart = new MimeMultipart("related");
    BodyPart mbp1 = new MimeBodyPart();
    mbp1.setContent(body, "text/html");         
    multipart.addBodyPart(mbp1);
    Transport.send(msg);

错误堆栈跟踪:

javax.mail.NoSuchProviderException: smtp
    at javax.mail.Session.getService(Session.java:764)
    at javax.mail.Session.getTransport(Session.java:689)
    at javax.mail.Session.getTransport(Session.java:632)
    at javax.mail.Session.getTransport(Session.java:612)
    at javax.mail.Session.getTransport(Session.java:667)
    at javax.mail.Transport.send0(Transport.java:154)
    at javax.mail.Transport.send(Transport.java:80)

注意:

1. 如果作为桌面应用程序执行,相同的代码.但是在tomcat上部署时抛出异常.
2. 最新的mail.jar和smtp.jar被添加到库中.
3. SMTP主机地址也是正确的.

如果有人可以指点我会有所帮助.