Java来通过Gmail发送电子邮件

Question

大家好我刚才一直在试图得到一些Java代码来发送电子邮件到通过Gmail的Java用户，这是我所：

@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. 
     } 
    } 
} 

它没有错误时运行等，我没有得到控制台中的发送消息，它只是在Transport.send（味精）它卡住了我做错了什么？ 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： 试图在提供给我一个链接的例子：

@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(); 
    } 
} 

，这是抛出了这个错误：

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 

Answer 1

我认为你需要使用端口，SMTPS（不SMTP）运输。

从一个开源项目，一个完整的可行代码：

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(); 
} 

Answer 2

props.put("mail.smtp.port", "587"); 

尝试更改以上代码为：

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

javax.mail.Authenticator();您的问题在哪里？

Answer 3

尝试与交通运输做到这一点：

final Transport transport = session.getTransport("smtp"); 
    transport.connect(host, from, pass); 
    transport.sendMessage(msg, msg.getAllRecipients()); 
    transport.close(); 

Answer 4

试试这个代码。它完全是工作...

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(); 
     } 
    } 
} 

Answer 5

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); 
    } 

}