Operation Principle
##When the jsp page (code) is accessed for the first time, A request will be made to a servlet container (tomcat, etc.). The servlet container must first convert the jsp page (code) into servlet code (.java), then compile it into a .class file and then call it. When accessing the jsp page (code) again, skip the translation and compilation process and call it directly.
Web server transmission (serves ) page allows the browser to browse, but the application server provides methods that the client application can call. To be more precise, you can say: Web servers specialize in handling HTTP requests, but application servers serve business logic to applications through many protocols.
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