我想通过我的java插件发送Bukkit通知（A Minecraft修改平台）通过gmail帐户发送此通知最简单。
我无法让JavaMail正常使用bukkit，它在独立程序中运行良好。我也不知道用我的插件包装它是否违反许可条款。
所以我希望能够在没有JavaMail API的情况下通过Gmail发送电子邮件。 如您所知，Gmail需要SSL连接或TLS连接。
输出：
220-moai.tallduck.com ESMTP Exim 4.69 #1 Mon, 05 Mar 2012 22:14:02 -0700
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
250-moai.tallduck.com Hello pool-CENSORED.cncdnh.fast.myfairpoint.net [CENSORED]
250-SIZE 52428800
250-PIPELINING
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
334 CENSORED
334 CENSORED
235 Authentication succeeded
250 OK
500 unrecognized command
250 Accepted
354 Enter message, ending with "." on a line by itself
250 OK id=1S4mio-0001VV-PB
221 moai.tallduck.com closing connection
Done.
邮件确实发送，但发件人和收件人为空。
答案 0 :(得分：3)
是的，您可以使用套接字直接发送消息，例如：
import java.net.*;
import java.io.*;
import java.util.*;
public class SendingEmailUsingSocket {
public static void main(String[] args) {
int port = 25;
String host = "smtp.gmail.com";
try {
Socket socket = new Socket(host, port);
sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();
String username = encoder.encode("wajdyessam@gmail.com".getBytes());
String password = encoder.encode("yourpassword".getBytes());
DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
DataInputStream is = new DataInputStream(socket.getInputStream());
dos.writeBytes("HELO\r\n");
dos.writeBytes("AUTH LOGIN");
dos.writeBytes("\r\n");
dos.writeBytes(username);
dos.writeBytes("\r\n");
dos.writeBytes(password);
dos.writeBytes("\r\n");
dos.writeBytes("MAIL FROM:<wajdyessam@hotmail.com>\r\n");
dos.writeBytes("\r\n");
dos.writeBytes("RCPT TO: <wajdyessam@gmail.com>\r\n");
dos.writeBytes("DATA\r\n");
dos.writeBytes("Subject: Email test\r\n");
dos.writeBytes("Test 1 2 3");
dos.writeBytes("\r\n.\r\n");
dos.writeBytes("QUIT\r\n");
dos.flush();
String responseline;
while((responseline = is.readLine())!=null) {
System.out.println(responseline);
}
is.close();
dos.close( );
socket.close( );
}
catch (IOException ex) {
System.err.println(ex);
}
}
}
注释： 用户名和密码应使用Base64进行编码，我使用弃用的方法，但可以使用其他方式：Apache Commons库中的Base64编码。
用户名，密码，主题，来自和来自硬编码，如果你想要通用方法，你应该在那里传递字符串。
答案 1 :(得分：1)
更好的是，您可以使用Apache Email API。这允许您定义HTML电子邮件和附件的东西。更好的是它经过了试验和测试。这是我的插件CommandsEX中使用的方法，因此它绝对适用于Bukkit！
您可以在我们的GitHub回购中查看它是如何工作的。可以找到确切的类here。
答案 2 :(得分：-1)
这就是我用于公司的应用程序。 （需要this）
private String SMTP_HOST = "smtp.gmail.com";
private String FROM_ADDRESS = "######@gmail.com";
private String FROM_PASSWORD = "########";
private String TO_ADDRESS = "###############";
private String FROM_NAME = "VDRS Lictor Training Application Emailer";
private Properties props = new Properties();
props.put("mail.smtp.host", SMTP_HOST);
props.put("mail.smtp.user",FROM_NAME);
props.put("mail.smtp.ssl.enable", "true");
props.put("mail.smtp.port", "25");
props.put("mail.debug", "true");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable","true");
props.put("mail.smtp.EnableSSL.enable","true");
props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.setProperty("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.port", "465");
props.setProperty("mail.smtp.socketFactory.port", "465");
这是我使用的实际代码。请根据您的需要进行修改。
try{
JButton b = (JButton) arg0.getSource();
//button animation
b.setText("Submitting Application...");
//get values
String player = name.getText();
//make the message
String msg = "<title>New Lictor Training Application from: " + player + "</title> \n";
msg+="<h3>[Name]: </h3>" + player + "\n";
msg+="<h3>[BR]: </h3>" + spinner.getValue() + "\n";
msg+="<h3>[Platoon Leading Experience]: </h3>" + ((JLabel) slider.getLabelTable().get(slider.getValue())).getText() + "\n";
String time = timeEditor.getTextField().getText();
String[] a = time.split(":");
int hours = Integer.parseInt(a[0]);
int min = Integer.parseInt(a[1]);
calander.getDate().setHours(hours);
calander.getDate().setMinutes(min);
calander.getDate().setSeconds(00);
msg+="<h3>[Date/Time]: </h3>" + calander.getDate().toGMTString()+"\n";
msg+="<h3>[Email]: </h3>" + email.getText();
//set up email
Session session = Session.getInstance(props, new AuthorizeEmail());
MimeMessage message = new MimeMessage(session);
try {
message.setFrom(new InternetAddress(FROM_ADDRESS));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(TO_ADDRESS));
message.setSubject("New Outfit Application from: " + player);
message.setContent(msg, "text/html");
Transport.send(message);
b.setText("Application Submitted!");
} catch (MessagingException e)
{
JOptionPane.showMessageDialog(null, "Failed sending application, please try again later.");
b.setText("Submit Application");
}
}catch(NullPointerException e)
{
JOptionPane.showMessageDialog(null, "Failed sending application.\n Did you fill out all the fields?.");
submit.setText("Submit Application");
}
class AuthorizeEmail extends Authenticator {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(FROM_ADDRESS, FROM_PASSWORD);
}
}