下面是一個例子，從你的機器發送HTML格式電子郵件。這裏通過使用JangoSMPT服務器的郵件發送到我們的目標電子郵件地址。

這個例子非常相似，發送簡單的電子郵件，除非，這裏我們使用的是使用setContent()方法來設置內容的第二個參數爲「"text/html"指定的HTML內容被包含在消息中。通過這個例子，你可以發送喜歡HTML內容。

發送包含HTML內容的電子郵件，遵循的步驟是：

• 獲得一個Session

• 創建一個默認的MimeMessage對象，並設置發件人，收件人，主題（From, To, Subject）在消息中。

• 設置使用使用setContent（實際的消息），如下方法：

  message.setContent("

  This is actual message embedded in

   HTML tags</h1>", "text/html");

• 發送使用傳輸對象的消息。

創建Java類

創建一個Java類文件SendHTMLEmail，是其內容如下：

package com.yiibai; 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; public class SendHTMLEmail { public static void main(String[] args) { // Recipient's email ID needs to be mentioned. String to = "destinationemail@gmail.com"; // Sender's email ID needs to be mentioned String from = "fromemail@gmail.com"; final String username = "manishaspatil";//change accordingly final String password = "******";//change accordingly // Assuming you are sending email through relay.jangosmtp.net String host = "relay.jangosmtp.net"; Properties props = new Properties(); props.put("mail.smtp.auth", "true"); props.put("mail.smtp.starttls.enable", "true"); props.put("mail.smtp.host", host); props.put("mail.smtp.port", "25"); // Get the Session object. Session session = Session.getInstance(props, new javax.mail.Authenticator() { protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(username, password); } }); try { // Create a default MimeMessage object. Message message = new MimeMessage(session); // Set From: header field of the header. message.setFrom(new InternetAddress(from)); // Set To: header field of the header. message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to)); // Set Subject: header field message.setSubject("Testing Subject"); // Send the actual HTML message, as big as you like message.setContent( "

This is actual message embedded in HTML tags

", "text/html"); // Send message Transport.send(message); System.out.println("Sent message successfully...."); } catch (MessagingException e) { e.printStackTrace(); throw new RuntimeException(e); } } }

由於我們使用的是由主機提供商JangoSMTP提供 SMTP服務器，我們需要驗證用戶名和密碼。javax.mail.PasswordAuthentication類用於驗證的密碼。

編譯並運行

Now that our class is ready, let us compile the above class. I've saved the class SendHTMLEmail.java to directory : /home/manisha/JavaMailAPIExercise. We would need the jars javax.mail.jar andactivation.jar in the classpath. Execute the command below to compile the class (both the jars are placed in /home/manisha/ directory) from command prompt:

javac -cp /home/manisha/activation.jar:/home/manisha/javax.mail.jar: SendHTMLEmail.java

Now that the class is compiled, execute the below command to run:

java -cp /home/manisha/activation.jar:/home/manisha/javax.mail.jar: SendHTMLEmail

Verify Output

You should see the following message on the command console:

Sent message successfully....

As I'm sending an email to my gmail address through JangoSMTP, the following mail would be received in my gmail account inbox: