Useful learn it ”Java server pages”!!!

Java Server Pages (JSP) are an extension of servlet technology. They are essentially a simplified way of writing servlets, with more emphasis on the presentation aspect of the application. The main difference between servlets and JSPs is that with servlets, the application logic is in a Java file and is totally separate from the HTML in the presentation layer. With JSPs, Java and HTML are combined into one file that has a .jsp extension. JSPs are evolving toward containing no Java code at all and using tag libraries only. For example, JSTL has tags for conditions and loops, which would replace Java code. When the web server processes the JSP file, a servlet is actually generated, but you as a developer are not going to see this generated servlet. In fact, when you are compiling and running your JSP within the JBuilder IDE, you may see exceptions or errors which are actually occurring in the generated servlet. This can be a bit confusing, because it can be somewhat difficult to tell which part of your JSP is causing a problem when the error message refers to a line of code which is actually part of the generated code.

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