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Jakarta Server Pages (JSP; formerly JavaServer Pages) [1] is a collection of technologies that helps software developers create dynamically generated web pages based on HTML, XML, SOAP, or other document types. Released in 1999 by Sun Microsystems, [2] JSP is similar to PHP and ASP, but uses the Java programming language.
Life of a JSP file. A Jakarta Servlet, formerly Java Servlet is a Java software component that extends the capabilities of a server.Although servlets can respond to many types of requests, they most commonly implement web containers for hosting web applications on web servers and thus qualify as a server-side servlet web API.
A web container (also known as a servlet container; [1] and compare "webcontainer" [2]) is the component of a web server that interacts with Jakarta Servlets.A web container is responsible for managing the lifecycle of servlets, mapping a URL to a particular servlet and ensuring that the URL requester has the correct access-rights.
JSP Model 2 is a complex design pattern used in the design of Java Web applications which separates the display of content from the logic used to obtain and manipulate the content. Since Model 2 drives a separation between logic and display, it is usually associated with the model–view–controller (MVC) paradigm.
JSP is not used to structure programs at the level of classes and objects, although it can helpfully structure control flow within a class's methods. JSP uses a diagramming notation to describe the structure of inputs, outputs and programs, with diagram elements for each of the fundamental component types. A simple operation is drawn as a box.
In the design of Java Web applications, there are two commonly used design models, referred to as Model 1 and Model 2. [1]A simplified diagram of a Model 1 implementation. In Model 1, a request is made to a JSP or servlet and then that JSP or servlet handles all responsibilities for the request, including processing the request, validating data, handling the business logic, and generating a ...
With server-side rendering, the page is generally assembled on the server once per each request. By contrast, with static site generation, the application generates all the static HTML pages at build time. These pre-built pages are then sent to the client at each request, without having to build them again.
During the development of JSP 2.0, the JavaServer Faces technology was released which also needed an expression language, but the expression language defined in the JSP 2.0 specification didn't satisfy all the needs for development with JSF technology. The most obvious limitations were that its expressions were evaluated immediately, and the ...