3

大家好，我一直在尝试获取一些 java 代码以通过 gmail 向 java 中的用户发送电子邮件，这就是我所拥有的：

@ManagedBean
@ViewScoped
public class email {

    // Set up the SMTP server.
    java.util.Properties props = new java.util.Properties();

    public void mail() {
        System.out.println("Called mail");
        props.put(
                "mail.smtp.gmail", "smtp.gmail.com");
        props.put("mail.smtp.port", "587");

        Session session = Session.getDefaultInstance(props, null);
// Construct the message
        String to = "cam01342@myport.ac.uk";
        String from = "richard.dennis@port.ac.uk";
        String subject = "Hello";
        Message msg = new MimeMessage(session);


        try {
            System.out.println("Setting up the email");
            msg.setFrom(new InternetAddress(from));
            msg.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
            System.out.println("here");

            msg.setSubject("Print Job");
            msg.setText("Hi,\n\nHow are you?");

            Transport.send(msg);
            System.out.println("Sending message"); //does not get to this part
        } catch (MessagingException e) {
            // Error.
        }
    }
}

它在运行等时没有错误，我没有在控制台中收到发送消息，它只是 Transport.send(msg) 卡在我做错了什么的地方？gmail的设置都可以吗？

编辑：

@ManagedBean
@ViewScoped
public class email {

    // Set up the SMTP server.
    java.util.Properties props = new java.util.Properties();

    public void mail() {
        System.out.println("Called mail");
        String host = "smtp.gmail.com";
        String from = "------------";
        String pass = "----";

        props.put("mail.smtp.starttls.enable", "true"); // added this line
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");


        Session session = Session.getDefaultInstance(props, null);
// Construct the message
        String to = "--------";
        String subject = "Hello";
        Message msg = new MimeMessage(session);


        try {
            System.out.println("Setting up the email");
            msg.setFrom(new InternetAddress(from));
            msg.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
            System.out.println("here");

            msg.setSubject("Print Job");
            msg.setText("Hi,\n\nHow are you?");

            Transport.send(msg);
            System.out.println("Sending message"); //does not get to this part
        } catch (MessagingException e) {
            // Error.
        }
    }
}

编辑：尝试提供给我的链接之一中的示例：

@ManagedBean
@ViewScoped
public class email {

    // Set up the SMTP server.
    public void mail() throws MessagingException {
        String host = "smtp.gmail.com";
        String from = "------------";
        String pass = "------";
        Properties props = System.getProperties();
        props.put("mail.smtp.starttls.enable", "true"); // added this line
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");

        String[] to = {"-----------"}; // added this line

        Session session = Session.getDefaultInstance(props, null);
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));

        InternetAddress[] toAddress = new InternetAddress[to.length];

        // To get the array of addresses
        for (int i = 0; i < to.length; i++) { // changed from a while loop
            toAddress[i] = new InternetAddress(to[i]);
        }
        System.out.println(Message.RecipientType.TO);

        for (int i = 0; i < toAddress.length; i++) { // changed from a while loop
            message.addRecipient(Message.RecipientType.TO, toAddress[i]);
        }
        message.setSubject("sending in a group");
        message.setText("Welcome to JavaMail");
        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();
    }
}

这引发了这个错误：

INFO: To
WARNING: #{email.mail()}: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 25;
  nested exception is:
    java.net.ConnectException: Connection timed out: connect
javax.faces.FacesException: #{email.mail()}: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 25;
  nested exception is:
    java.net.ConnectException: Connection timed out: connect
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
    at javax.faces.component.UICommand.broadcast(UICommand.java:315)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)
Caused by: javax.faces.el.EvaluationException: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 25;
  nested exception is:
    java.net.ConnectException: Connection timed out: connect
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
    ... 36 more
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 25;
  nested exception is:
    java.net.ConnectException: Connection timed out: connect
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1934)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:638)
    at javax.mail.Service.connect(Service.java:295)
    at javax.mail.Service.connect(Service.java:176)
    at richard.fileupload.email.mail(email.java:101)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at javax.el.BeanELResolver.invokeMethod(BeanELResolver.java:779)
    at javax.el.BeanELResolver.invoke(BeanELResolver.java:528)
    at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:257)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:248)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39)
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
    ... 37 more
Caused by: java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
    at java.net.Socket.connect(Socket.java:579)
    at java.net.Socket.connect(Socket.java:528)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:288)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:231)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1900)
    ... 54 more
4

5 回答 5

4

我认为您需要使用465端口和smtps（不是 smtp）进行传输。

来自开源项目的完整可行代码：

http://jstock.hg.sourceforge.net/hgweb/jstock/jstock/file/d9290c44d19c/src/org/yccheok/jstock/alert/GoogleMail.java

/**
 * Send email using GMail SMTP server.
 *
 * @param username GMail username
 * @param password GMail password
 * @param recipientEmail TO recipient
 * @param ccEmail CC recipient. Can be empty if there is no CC recipient
 * @param title title of the message
 * @param message message to be sent
 * @throws AddressException if the email address parse failed
 * @throws MessagingException if the connection is dead or not in the connected state or if the message is not a MimeMessage
 */
public static void Send(final String username, final String password, String recipientEmail, String ccEmail, String title, String message) throws AddressException, MessagingException {
    Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
    final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";

    // Get a Properties object
    Properties props = System.getProperties();
    props.setProperty("mail.smtps.host", "smtp.gmail.com");
    props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
    props.setProperty("mail.smtp.socketFactory.fallback", "false");
    props.setProperty("mail.smtp.port", "465");
    props.setProperty("mail.smtp.socketFactory.port", "465");
    props.setProperty("mail.smtps.auth", "true");

    /*
    If set to false, the QUIT command is sent and the connection is immediately closed. If set 
    to true (the default), causes the transport to wait for the response to the QUIT command.

    ref :   http://java.sun.com/products/javamail/javadocs/com/sun/mail/smtp/package-summary.html
            http://forum.java.sun.com/thread.jspa?threadID=5205249
            smtpsend.java - demo program from javamail
    */
    props.put("mail.smtps.quitwait", "false");

    Session session = Session.getInstance(props, null);

    // -- Create a new message --
    final MimeMessage msg = new MimeMessage(session);

    // -- Set the FROM and TO fields --
    msg.setFrom(new InternetAddress(username + "@gmail.com"));
    msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipientEmail, false));

    if (ccEmail.length() > 0) {
        msg.setRecipients(Message.RecipientType.CC, InternetAddress.parse(ccEmail, false));
    }

    msg.setSubject(title);
    msg.setText(message, "utf-8");
    msg.setSentDate(new Date());

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

    t.connect("smtp.gmail.com", username, password);
    t.sendMessage(msg, msg.getAllRecipients());      
    t.close();
}
于 2013-02-18T16:29:04.603 回答
0 
props.put("mail.smtp.port", "587");

尝试将上面的代码更改为：

props.put("mail.smtp.port", "465");

你在哪里javax.mail.Authenticator();？

于 2013-02-18T15:33:59.253 回答
0

尝试使用 Transport 执行此操作：

    final Transport transport = session.getTransport("smtp");
    transport.connect(host, from, pass);
    transport.sendMessage(msg, msg.getAllRecipients());
    transport.close();
于 2013-02-18T15:49:26.663 回答
0

试试这个代码。它完全可以工作...

package my.test.service;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Message;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class Sample {
    public static void main(String args[]) {
        final String SMTP_HOST = "smtp.gmail.com";
        final String SMTP_PORT = "587";
        final String GMAIL_USERNAME = "xxxxxxxxxx@gmail.com";
        final String GMAIL_PASSWORD = "xxxxxxxxxx";

        System.out.println("Process Started");

        Properties prop = System.getProperties();
        prop.setProperty("mail.smtp.starttls.enable", "true");
        prop.setProperty("mail.smtp.host", SMTP_HOST);
        prop.setProperty("mail.smtp.user", GMAIL_USERNAME);
        prop.setProperty("mail.smtp.password", GMAIL_PASSWORD);
        prop.setProperty("mail.smtp.port", SMTP_PORT);
        prop.setProperty("mail.smtp.auth", "true");
        System.out.println("Props : " + prop);

        Session session = Session.getInstance(prop, new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(GMAIL_USERNAME,
                        GMAIL_PASSWORD);
            }
        });

        System.out.println("Got Session : " + session);

        MimeMessage message = new MimeMessage(session);
        try {
            System.out.println("before sending");
            message.setFrom(new InternetAddress(GMAIL_USERNAME));
            message.addRecipients(Message.RecipientType.TO,
                    InternetAddress.parse(GMAIL_USERNAME));
            message.setSubject("My First Email Attempt from Java");
            message.setText("Hi, This mail came from Java Application.");
            message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse(GMAIL_USERNAME));
            Transport transport = session.getTransport("smtp");
            System.out.println("Got Transport" + transport);
            transport.connect(SMTP_HOST, GMAIL_USERNAME, GMAIL_PASSWORD);
            transport.sendMessage(message, message.getAllRecipients());
            System.out.println("message Object : " + message);
            System.out.println("Email Sent Successfully");
        } catch (AddressException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (MessagingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}
于 2014-02-15T16:06:48.870 回答
0 
import java.util.Properties;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class MessageSender {

    public static void sendHardCoded() throws AddressException, MessagingException {
        String to = "a@a.info";
        final String from = "b@gmail.com";

        Properties properties = new Properties();
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.host", "smtp.gmail.com");
        properties.put("mail.smtp.port", "587");

        Session session = Session.getInstance(properties,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication(from, "BeNice");
                    }
                });

        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        message.setSubject("Hello");
        message.setText("What's up?");

        Transport.send(message);
    }

}
于 2014-12-10T13:29:01.347 回答