Java邮件有连接错误 [英] Java mail has connection errors
本文介绍了Java邮件有连接错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试使用Java应用程序发送电子邮件,但它始终会给我返回连接错误.所以我的代码看起来像这样:
I'm trying to send an email using my java application, but it always gives me a connection error back. So my code looks like this:
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
public class SendMail {
public static void main(String [] args) {
String to = "something@gmail.com";
String from = "fromsomeone@gmail.com";
String host = "localhost";
Properties properties = System.getProperties();
properties.setProperty("mail.user", "fromsomeone");
properties.setProperty("mail.password", "passwordForSomeone");
properties.setProperty("mail.smtp.host", host);
Session session = Session.getDefaultInstance(properties);
try {
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
message.setSubject("subject typed");
message.setText("This is actual message which is just some lines");
Transport.send(message);
}catch (MessagingException mex) {
mex.printStackTrace();
}
}
}
我当然会提供有效的信息(使用我的Gmail帐户).这是我得到的错误:
of course I provide valid information (using my gmail account). And this is the error I get back:
com.sun.mail.util.MailConnectException: Couldn't connect to host, port: localhost, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection refused (Connection refused)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2118)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:712)
at javax.mail.Service.connect(Service.java:366)
at javax.mail.Service.connect(Service.java:246)
at javax.mail.Service.connect(Service.java:195)
at javax.mail.Transport.send0(Transport.java:254)
at javax.mail.Transport.send(Transport.java:124)
at email.SendMail.main(SendMail.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:331)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:238)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2084)
... 12 more
有人可以帮助我,我的代码有什么问题吗?谢谢!
Can someone help me, what is wrong with my code? Thank you!
推荐答案
这将帮助您通过gmail帐户发送邮件;
This will be help you to send mail via gmail account;
public class MailMan {
Session session = null;
public MailMan() {
if (session == null) {
init();
}
}
public void init() {
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
session = Session.getDefaultInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("EMAIL", "PASSWORD");
}
});
if (session != null) {
System.out.println("[OK]");
} else {
System.out.println("[NOK]");
}
}
public void sendMail() {
if (session == null) {
System.exit(0);
}
try {
String messageText = "";
Message message = new MimeMessage(session);
try {
message.setFrom(new InternetAddress("no-reply", "No Reply"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
message.setReplyTo(InternetAddress.parse("no-reply"));
message.addRecipients(Message.RecipientType.TO, InternetAddress.parse("to_email"));
message.setSubject("TEST");
message.setText(messageText);
Transport.send(message);
System.out.println("[OK]");
} catch (MessagingException e) {
e.printStackTrace();
System.out.println("Not Sent...");
}
}
}
和主要阶级;
public class SendMail {
public static void main(String[] args) {
MailMan ma = new MailMan();
ma.sendMail();
}
}
毕竟,您应该打开访问不太安全的应用程序".
After all you should turn on your "Access for less secure apps".
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