Asked by: Sheila Peeper
technology and computing web development

How does a JSP engine work?

Last Updated: 4th February, 2020

37
The JSP engine loads the JSP page fromdiskand converts it into a servlet content. The JSPenginecompiles the servlet into an executable class andforwards theoriginal request to a servlet engine. A part ofthe webserver called the servlet engine loads the Servletclass andexecutes it.

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Also know, what is JSP and why it is used?

A JavaServer Pages component is a type of Javaservletthat is designed to fulfill the role of a user interface fora Javaweb application. Web developers write JSPs as textfilesthat combine HTML or XHTML code, XML elements, andembeddedJSP actions and commands.

Additionally, how do I open a JSP file? Open the "File" menu andselect"Open" A standard file chooser window opens.Select"All Files" from the "Files of type" menu atthebottom of the window. Choose the folder, drive, device, orlocationof the JSP file under the "Look in"menu.

what do you mean by JSP processing?

JSP stands for Java Server Pages. AllyourJSP pages are stored on the server. The webserverhave JSP engine which acts as a container toprocessJSP pages.

What are the advantages of JSP?

Java is more powerful, flexible, reliable andportablethan PHP. Regular HTML, that is static HTML, does notcontaindynamic information. So it does not react to user input andis alsonot fit for accessing server side resources. JSPcontainsboth static and non-static content.

Related Question Answers

Silvania Piechol

Professional

Is JSP front end or backend?

JSP is not a front-endtechnology,rather, a Back-end or Server-side Technology.Thefront-end in jsp is the Html markuptext.while the jstl & el are java codes that representsthejsp concept or implementation.

Almike Facon

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What is JSP life cycle?

Life cycle of JSP. A Java ServerPagelife cycle is defined as the process started withitscreation which later translated to a servlet and afterwardservletlifecycle comes into play. Instantiation(Object ofthegenerated Servlet is created) Initialization(jspInit() methodisinvoked by the container)

Olexiy Nelo

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What language is JSP?

JavaServer Pages (JSP) is a technology thathelpssoftware developers create dynamically generated web pagesbased onHTML, XML, or other document types. Released in 1999 bySunMicrosystems, JSP is similar to PHP and ASP, but it usestheJava programming language.

Rubiela Sigllechner

Explainer

What is Ajax used for?

AJAX is a technique for creating fast anddynamicweb pages. AJAX allows web pages to beupdatedasynchronously by exchanging small amounts of data with theserverbehind the scenes. This means that it is possible to updatepartsof a web page, without reloading the whole page.

Alvaro Bartlechner

Explainer

Which is better JSP or PHP?

Mastering JSP requires knowledge of Java andHTMLsyntax whereas PHP being a scripting language is easiertolearn and understand. JSP supports object caching withitsextensive support for APIs whereas PHP does notsupportcaching.

Floyd Cerejinho

Explainer

What is difference between HTML and JSP?

HTML is a client side scripting languagewhileJSP is a server side programming technology.HTML isfast as it runs on client (browser) while JSPis slower toload as it runs on server (Apache tomcat, glassfish)HTML issimple to code, JSP needs some knowledge ofJava programmingto use it to full extent.

Audelina Echeita

Pundit

What is Servlet life cycle?

A servlet life cycle can be defined as theentireprocess from its creation till the destruction. The followingarethe paths followed by a servlet. The servletisinitialized by calling the init() method. The servletcallsservice() method to process a client's request.

Zuhair Amas

Pundit

What is difference between JSP and JavaScript?

Conclusion – JSPvsJavaScript
Java Server Pages provide dynamic web content on thewebpages and its' associated documented style format fortherepresentation of view layer whereas the JavaScript canbeused only as Scripting language whereas it requires HTML todisplaythe content.

Beau Giebmanns

Pundit

What is JSP and how it works?

JSP - Architecture. A JSPcontainerworks with the Web server to provide the runtimeenvironmentand other services a JSP needs. It knows how tounderstandthe special elements that are part of JSPs.Followingdiagram shows the position of JSP container andJSPfiles in a Web application.

Stancho Godel

Pundit

Which JSP life cycle is in correct order?

Explanation: Default value “true”depictsautomatic buffer flushing. 7. Which one is the correctorderof phases in JSP life cycle? Explanation: Thecorrectorder is Compilation, Initialization,Execution,Cleanup.

Liguang Tschisch

Pundit

What are the components of JSP?

In JSP there are three types ofscriptingelements:
  • JSP Expressions: It is a small java code which you canincludeinto a JSP page. The syntax is “<%= some javacode%>”
  • JSP Scriptlet: The syntax for a scriptlet is “<%somejava code %>”.
  • JSP Declaration: The syntax for declarationis“<%!

Welington Ledger

Teacher

How do servlets work?

Servlets are the Java programs that runs ontheJava-enabled web server or application server. They are usedtohandle the request obtained from the web server, processtherequest, produce the response, then send response back to thewebserver. Properties of Servlets : Servlets work ontheserver-side.

Amandeep Monistrol

Teacher

What is the difference between servlet and JSP?

Servlet is html in java whereas JSP isjavain html. Servlets run faster compared toJSP.JSP is a webpage scripting language that cangeneratedynamic content while Servlets are Java programsthat arealready compiled which also creates dynamic web content. InMVC,jsp acts as a view and servlet acts asacontroller.

Amara Sholk

Teacher

What are the JSP implicit objects?

JSP implicit objects are created duringthetranslation phase of JSP to the servlet.Theseobjects can be directly used in scriplets that goes intheservice method. They are created by the containerautomatically,and they can be accessed usingobjects.

Jeanelle Senfter

Teacher

How JSP is executed?

JSP Compilation
If the page has never been compiled, or iftheJSP has been modified since it was last compiled,theJSP engine compiles the page. When the JSPisconverted into an servlet, it has to be executed attheserver side to serve the request. JSP is aserver-sidetechnology built on Servlets.

Xiuyu Ciner

Reviewer

How JSP is compiled?

If the JSP is not compiled yet,theJSP servlet translates the JSP to some Javasourcecode implementing the Servlet interface. Then itcompilesthis Java source code to a .class file. This .classfile usually islocated somewhere in the servlet container's workdirectory for theapplication.

Azouz Gruters

Reviewer

When destroy method of JSP is called?

destroy() method is called bytheservlet container to indicate to a servlet that the servletisbeing taken out of service. This method isonlycalled once all threads within the servlet'sservicemethod have exited or after a timeout periodhaspassed.

Sanda Onopriev

Reviewer

How do I run a JSP file in Notepad?

How to Run a JSP Program in ApacheTomcat(Windows)
  1. In your text editor, you will develop a simple JSP thatcreatesa web page to display the current date.
  2. Save your file as DateJSP.jsp .
  3. Copy your file to CATALINA_HOME/webapps/ROOT ,e.g.,c:/Tomcat8/webapps/ROOT .
  4. Start the Tomcat server.
  5. Start your browser if it is not already running.

Piedade Weidle

Reviewer

Can I run JSP on Xampp?

XAMPP is for php only. To run jsp'syouneed to run on a server, preferably on tomcat server.Todo that you need to develop a web application with htmlandjsp and deploy it in tomcat webappsdirectory.

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4th February, 2020

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