我有一个使用“纯”JSP，Servlet和Hibernate开发的Web应用程序。它也与Java Mail一起使用。 Java邮件功能几乎适用于我们在此测试的每台机器，直到今天。它在部署服务器上不起作用（它实际上是一台Windows 7 PC，我认为bcs它有一个GUI）。它给了我以下错误
com.sun.mail.util.MailConnectException: Couldn't connect to host, port: mail.xxx.com, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection timed out: connect
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2053)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:69
7)
at javax.mail.Service.connect(Service.java:386)
at javax.mail.Service.connect(Service.java:245)
at javax.mail.Service.connect(Service.java:194)
at javax.mail.Transport.send0(Transport.java:253)
at javax.mail.Transport.send(Transport.java:124)
at RemindeWorker.Listener.MailClient.sendEmail(MailClient.java:65)
at Filter.AuthenticationFilter_Level1.doFilter(AuthenticationFilter_Leve
l1.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
torBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:
950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:421)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp
11Processor.java:1070)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(
AbstractProtocol.java:611)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoin
t.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskTh
read.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketI
mpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.ja
va:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocket
Impl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java
:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
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:312)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:236)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2019)
... 25 more
Level1 executed
NUM is: 1
以下是我的代码。
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package RemindeWorker.Listener;
import java.util.List;
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.InternetAddress;
import javax.mail.internet.MimeMessage;
/**
*
* @author Yohan
*/
public class MailClient
{
public void sendEmail(final String userName, final String password, final String host, final String html, final List<String>emails, String subject) throws MessagingException
{
System.out.println("User Name: "+userName);
System.out.println("Password: "+password);
System.out.println("Host: "+host);
// String host="mail.xxx.com";
// final String user="abc@xxx.com";//change accordingly
// final String password="knight55";//change accordingly
//Get the session object
Properties props = new Properties();
props.put("mail.smtp.host",host);
props.put("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName,password);
}
});
if(!emails.isEmpty())
{
//Compose the message
InternetAddress[] address = new InternetAddress[emails.size()];
for (int i = 0; i < emails.size(); i++) {
address[i] = new InternetAddress(emails.get(i));
}
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(userName));
message.setRecipients(Message.RecipientType.TO, address);
message.setSubject(subject);
message.setContent(html,"text/html");
//send the message
Transport.send(message);
System.out.println("message sent successfully...");
}
else
{
System.out.println("No Recieptions");
}
}
}
阻止我的申请发送电子邮件是什么样的事情？服务器正在使用JRE 8和XAMPP。服务器管理员说防火墙已关闭！
答案 0 :(得分：1)
问题是端口25在某种程度上被阻止在服务器中。 SMTP的默认端口是端口25.我使用Properties更改了Java邮件的端口，但它确实有效。