Are JSP files compiled?

All JSPs in the directory and its subdirectories are compiled. You cannot specify a WAR, JAR, or ZIP file. You must first extract such files to an open directory structure. Compiles the generated servlets.

When JSP is compiled to a servlet?

When a request is mapped to a JSP page, the web container first checks whether the JSP page’s servlet is older than the JSP page. If the servlet is older, the web container translates the JSP page into a servlet class and compiles the class.

What happens when JSP is compiled?

At run time, the JSP code is interpreted by the JSP compiler, which parses out all the special features in the JSP code and translates them to Java code. The Java class created from each JSP implements Servlet . Then, the Java code goes through the same cycle it normally does.

What is advantage of JSP against servlet?

Advantages of JSP over Servlets JSP needs no compilation, CLASSPATH setting and packaging. In a JSP page visual content and logic are seperated, which is not possible in a servlet. There is automatic deployment of a JSP, recompilation is done automatically when changes are made to JSP pages.

How a JSP file is compiled and gets executed?

The JSP engine compiles the servlet into an executable class and forwards the original request to a servlet engine. A part of the web server called the servlet engine loads the Servlet class and executes it. During execution, the servlet produces an output in HTML format.

What is the use of JSP servlet?

JSP servlet translates the JSP to some Java source code implementing the Servlet interface. Then it compiles this Java source code to a .class file. This .class file usually is located somewhere in the servlet container’s work directory for the application.

What happens when a JSP page is called?

When a JSP page is called, it will be compiled (by the JSP engine) into a Java servlet. At this point the servlet is handled by the servlet engine, just like any other servlet.

Can I use JavaBeans components in JSP?

While JavaBeans components can be used to encapsulate much of the Java code, using them in JSP pages still requires content developers to have some knowledge of Java syntax. JSP technology allows you to introduce new custom tags through the tag library facility.

How to convert JSP file to HTML file?

There are 2 software engines in Java enterprise framework (JSP and Servelt are part of this frame work). The 1st Engine reads the JSP file, Converts it into a Servlet Class. The 2nd Engine then converts this Servlet Class Into HTML file. The whole process is dynamic and is done everytime you make a change in your JSP file.