Sending mail for JavaMail tutorial (3)

The JavaMail API defines a Java mail. Transport class, which is specially used to perform mail sending tasks. The instance object of this class encapsulates the underlying implementation details of a mail sending protocol. By calling the methods in this class, the application can send the mail data encapsulated in the message object to the specified SMTP server. The working relationship between the main APIs designed when sending mail using JavaMail is as follows:

1. Obtain the transport object that implements a mail sending protocol from the session object;

2. Create a message object using the session object, and call the method of the message object to encapsulate the message data;

3. Connect to the specified SMTP server and call the mail sending method in the transport object to the mail data encapsulated in the message object.

In the second article on creating mail in the introduction to JavaMail, we learned to create mail, but at that time, we wrote the mail to our local disk. Next, we used the transport class provided by JavaMail API to send mail.