我的程序中有两个例外.......
无法连接到localhost,端口25
连接被拒绝
mail.java的代码是---
package jMail;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
public class Mail {
private String to;
private String from;
private String message;
private String subject;
private String smtpServ;
public String getTo() {
return to;
}
public void setTo(String to) {
this.to = to;
}
public String getFrom() {
return from;
}
public void setFrom(String from) {
this.from = from;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getSmtpServ() {
return smtpServ;
}
public void setSmtpServ(String smtpServ) {
this.smtpServ = smtpServ;
}
public Exception sendMail(){
try
{
Properties props = System.getProperties();
// -- Attaching to default Session, or we could start a new one --
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.starttls.enable","true");
props.put("mail.smtp.host","localhost");
props.put("mail.smtp.auth", "true");
Authenticator auth = new SMTPAuthenticator();
Session session = Session.getInstance(props, auth);
// -- Create a new message --
Message msg = new MimeMessage(session);
// -- Set the FROM and TO fields --
msg.setFrom(new InternetAddress(from));
msg.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(to, false));
// -- We could include CC recipients too --
// if (cc != null)
// msg.setRecipients(Message.RecipientType.CC
// ,InternetAddress.parse(cc, false));
// -- Set the subject and body text --
msg.setSubject(subject);
msg.setText(message);
// -- Set some other header information --
msg.setHeader("MyMail", "Java Mail Test");
msg.setSentDate(new Date());
// -- Send the message --
Transport.send(msg);
System.out.println("Message sent to"+to+" OK.");
return null;
}
catch (Exception ex)
{
ex.printStackTrace();
System.out.println("Exception "+ex);
return ex;
}
}
private class SMTPAuthenticator extends javax.mail.Authenticator {
@Override
public PasswordAuthentication getPasswordAuthentication() {
String username = "Java.Mail.CA@gmail.com";
String password = "javamail";
return new PasswordAuthentication(username, password);
}
}
}
所以请告诉我该怎么做&为什么会出现这些例外&我怎么能用java& localhost作为主机。 .......................提前谢谢。
答案 0 :(得分:2)
只需遵循此代码;将电子邮件发送到java桌面非常有用,但它确实有用。
import java.util.*;
import javax.activation.CommandMap;
import javax.activation.MailcapCommandMap;
import javax.mail.*;
import javax.mail.Provider;
import javax.mail.internet.*;
public class Main
{
public static void main(String[] args)
{
final String username = "your@gmail.com";
final String password = "password";
Properties prop = new Properties();
prop.put("mail.smtp.auth", "true");
prop.put("mail.smtp.host", "smtp.gmail.com");
prop.put("mail.smtp.port", "587");
prop.put("mail.smtp.starttls.enable", "true");
Session session = Session.getDefaultInstance(prop, new javax.mail.Authenticator()
{
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(username, password);
}
});
try
{
String body = "Dear Renish Khunt Welcome";
String htmlBody = "<strong>This is an HTML Message</strong>";
String textBody = "This is a Text Message.";
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("your@gmail.com"));
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("receiver@gmail.com"));
message.setSubject("Testing Subject");
MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();
mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
CommandMap.setDefaultCommandMap(mc);
message.setText(htmlBody);
message.setContent(textBody, "text/html");
Transport.send(message);
System.out.println("Done");
}
catch (MessagingException e)
{
e.printStackTrace();
}
}
}
答案 1 :(得分:0)
以下是发送电子邮件的代码段。
try {
String host = "yourHostName";
String from = "test@test.com";
String to[] = {"test123@test123.com"};
String subject = "Test";
String message = "Test";
Properties prop = System.getProperties();
prop.put("mail.smtp.host", host);
Session sess1 = Session.getInstance(prop, null);
MimeMessage msg = new MimeMessage(sess1);
msg.setFrom(new InternetAddress(from));
InternetAddress[] toAddress = new InternetAddress[to.length];
for (int i = 0; i < to.length; i++) {
toAddress[i] = new InternetAddress(to[i]);
}
msg.setRecipients(Message.RecipientType.TO, toAddress);
msg.setSubject(subject);
//Fill the message
msg.setText(message);
Transport.send(msg);
} catch (MessagingException me) {
me.printStackTrace();
}
发送电子邮件时有什么例外?您确定您的SMTP服务器正在侦听默认端口25吗?您是否可以通过Telnet手动发送电子邮件?此外,在测试时关闭任何防火墙只是为了确保。