我正嘗試在java中編寫簡單的郵件程序。我應該使用什麼。我如何配置我的本地機器發送郵件？

Question

我正在寫一些應用程序，我需要發送郵件。我的應用程序是在JAVA中，所以我可能會使用javamail。但我不知道如何使用它，以及如何從我的本地電腦配置郵件服務器，以便我可以測試郵件是否可以發送。請建議。

Answer 1

您還可以使用GMAIL smtp發送郵件。
下面是一個示例代碼段

String host = "smtp.gmail.com"; 
    String from = "username"; 
    String pass = "password"; 
    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 = {"to@gmail.com"}; // 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();