JSP programming (1)-JSP entry

When talking about JSP program design, we should first understand the HTTP protocol.

1. Basic HTTP knowledge
HTTP is a hypertext transfer protocol and stateless protocol. It uses the default open port 80. The Browser needs to establish a connection with the server and send the request information to the server through a connection, request the corresponding resource, and then the server returns the corresponding message with the requested resource. Once the request is answered, the server closes the connection and does not store the connection information. Therefore, the server becomes a stateless protocol.

2. jsp Operation Mode

 

3. Advantages of JSP