How do jsps work

Forwarding requests—Servlets can forward a request to another servlet or other resource. Forwarding a Request. Servlets are deployed to WebLogic Server as part of a Web application.

The WebLogic appc compiler weblogic. Servlets and JSPs may require additional helper classes to be deployed with the Web application. JSPs enable you to separate the dynamic content of a Web page from its presentation.

It caters to two different types of developers: HTML developers, who are responsible for the graphical design of the page, and Java developers, who handle the development of software to create the dynamic content. The main theme for Java EE is ease of development. The platform's Web tier contributes significantly to ease of development in two ways. Second, all the Web-tier technologies offer a set of features that make development of Web applications on Java EE much easier, such as:.

A new expression language EL syntax that allows deferred evaluation of expressions, enables using expressions to both get and set data and to invoke methods, and facilitates customizing the resolution of a variable or property referenced by an expression. Support for resource injection through annotations to simplify configuring access to resources and environment data.

In addition, third-party vendors and application developers can provide JavaBean components and define custom JSP tags that can be referenced from a JSP page to provide dynamic content. JspPage interface. Otherwise, the previously compiled JSP servlet class is re-used, making subsequent responses much quicker.

It is also possible to invoke the JSP compiler directly without making a request from a browser. See Servlets. Oracle Enterprise Pack for Eclipse is an Eclipse-based development environment with pre-packaged tooling for Web applications targeting the Oracle platform. Both tools provide advanced code editor features, collaborative teamwork development, visual development and debugging, and streamlined deployment capabilities.

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.

The output is furthur passed on to the web server by the servlet engine inside an HTTP response. This makes the process more efficient than with the other scripting languages such as PHP and therefore faster. The two technologies typically work together, especially in older Java web applications.

From a coding perspective, the most obvious difference between them is that with servlets you write Java code and then embed client-side markup like HTML into that code, whereas with JSP you start with the client-side script or markup, then embed JSP tags to connect your page to the Java backend. While JSP may not be your first choice for building dynamic web pages, it is a core Java web technology. JSP pages are relatively quick and easy to build, and they interact seamlessly with Java servlets in a servlet container like Tomcat.

You will encounter JSP in older Java web applications, and from time to time you may find it useful for building simple, dynamic Java web pages. As a Java developer, you should at least be familiar with JSP.

See previous articles in this series to learn more about Java servlets and JavaServer Faces. A simple JSP page. When the file is processed on the server, the HTML is rendered as the application view, a web page. The embedded JSP tags will be used to call server-side code and data.

When executed, the JSP will output the results of executing whatever is inside the expression. In this case, the output will be the number 4. JSP pages must be deployed inside a Java servlet container. In order to deploy a Java web application based on JSP and servlets, you will package your.

Alexander Pogrebnyak Alexander Pogrebnyak Not sure why, but I find your last statement dubious. Do you have any references for this? No, because I was surprised not to find. Doing some debugging session with Jasper confirmed the last statement. Tomcat 7 uses Eclipse JDT for this. From good ole wikipedia: Architecturally, JSP may be viewed as a high-level abstraction of Java servlets. Kirk Woll Faraz Faraz 5, 5 5 gold badges 19 19 silver badges 66 66 bronze badges.

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