JSP learning path (1)

Servlet is a Java server component that is platform independent and 100% pure Java.
Similar to the Common Gateway Interface (CGI) script, servlets supports the request response programming mode. When the client
When sending a request to the server, the server sends the request to the servlet. Then, the servlet constructs a response,
The server sends the response back to the client. However, unlike CGI scripts, servlets and HTTP
The server runs in the same process.
When sending a client request, call the service method and pass a request and response object.
Servlet first checks whether the request is a get operation or a post operation. Then it calls the following
Method: doget or dopost. If the request is get, the doget method is called. If the request is post
Call the dopost method. Both doget and dopost accept requests (httpservletrequest) and responses
(Httpservletresponse ).