What does jsp do?

The full name of JSP is Java Server Pages (java server pages). JSP technology is somewhat similar to ASP technology. It is based on the traditional web page HTML (a subset of the Standard Universal Markup Language) file ( *.htm, *.html), insert Java program segment (Scriptlet) and JSP tag (tag) to form a JSP file with the suffix (*.jsp). Web applications developed with JSP are cross-platform and can run under Linux as well as other operating systems.

Simply put, JSP can:

● Embed Java script code in HTML

● The embedded Java script code is compiled and executed by the JSP engine in the application server

●Then the entire generated page information is returned to the client

The JSP page is executed by the JSP engine installed on the Web server or application server that uses JSP. The JSP engine accepts client requests for JSP pages and generates JSP pages as a response to the client.

JSP pages are usually compiled into Java Servlets, which is a standard Java extension. Page developers have access to the full Java application environment to take advantage of the scalability and portability of Java technology. When the JSP page is called for the first time, if it does not already exist, it will be compiled into a Java Servlets class and stored in the server's memory. This results in a very fast response from the server on subsequent calls to the page (this avoids the problem of CGI-BIN spawning a new process for each HTTP request).

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