Everand Logo

Welcome to Everand!

  • Discover millions of ebooks, audiobooks, and so much more with a free trial

    From $11.99/month after trial. Cancel anytime.

    Learn JSP in 24 Hours
    Learn JSP in 24 Hours
    Learn JSP in 24 Hours
    Ebook259 pages57 minutes

    Learn JSP in 24 Hours

    By Alex Nordeen

    ()

    Read preview

    About this ebook

    Java Server Pages or JSP technology is used to develop dynamic Java-based web applications. Various frameworks like JavaServer Faces, Struts 2, or Spring MVC are based on JSP. To quickly switch on to this technology and to reduce JSP learning time this e-book is designed.


    The step by step explanation of code and images in this book, will enable you to get a greater level of understanding on how JSP works? The book tried to explain some JSP core subject like JSTL tags, expressions, EL, etc. from grass root level. This edition has demonstrated examples on how to write template text in client side languages like JavaScript, HTML, CSS, and so on. To make JSP more interactive, real-time code execution option is also given. While for beginners key concepts of JSP is made easy to grasp.


    With a lot of example and coverage given, this book can be a learning guide for J2EE exams. It will answer all your JSP queries. The users will not struggle anymore with error handling, implementing caching strategies or re-using code across pages after going through this book. The book is small but loaded with vital information on JSP.


    Table of content


    Chapter 1: Introduction


    What is JSP?


    Why use JSP?


    Advantages of JSP


    Chapter 2: JSP Life Cycle


    Chapter 3: Install JSP with Jboss Server & Java


    Install Java


    Install Jboss Server


    Installation Testing


    Your First JSP


    Chapter 4: Elements


    JSP Declaration


    JSP Syntax


    JSP Expression


    JSP Comments


    Creating a simple JSP Page


    How to run simple JSP Page


    Directory Structure of JSP


    Chapter 5: Actions


    Directives


    Page directive


    Implicit objects


    Action


    Chapter 6: Expression Language (EL)


    Syntax of Expression Language (EL)


    If-else


    Switch


    For loop


    While loop


    Operators


    Chapter 7: Exception Handling


    JSP Exception


    Checked Exceptions


    Runtime Exceptions


    Error Exception


    Chapter 8: MVC


    MVC architecture


    Example of MVC architecture


    Chapter 9: Tag Library


    What is JSTL


    JSTL Core


    JSP Custom Tags


    Chapter 10: Action - File Upload, JSP Filter, Client Request, Server Response, Cookies Handling, Date Handling


    Client Request


    Server Response


    HTTP Status Codes


    Form Processing


    Filter


    Cookies Handling


    File Upload


    Date Handling


    Chapter 11: Database connection


    Create Table


    Create Records


    JSP Operations: Insert, Update, Delete, Select


    Chapter 12: JSP Example


    Registration form


    Login and Logout form


    Uploading and download file


    Chapter 13: Debug JSP Using Java Logger, Println statements & Debugging tools


    JSP Debugging Methods


    Using println statements


    Using Java Logger


    Using debugging tools

    LanguageEnglish
    PublisherPublishdrive
    Release dateOct 30, 2021
    Learn JSP in 24 Hours

    Read more from Alex Nordeen

    Related to Learn JSP in 24 Hours

    Related ebooks

    Internet & Web For You

    View More
    View More

    Related podcast episodes

    Related articles

    • UNLIMITED

      Create A RESTful Server In Go

      Oct 19, 2021

      Create A RESTful Server In Go
      8 min read

    • UNLIMITED

      Develop TCP/IP Servers And Clients

      Aug 23, 2022

      RUST OUR EXPERT Get the code for this tutorial from the Linux Format archive: www. linuxformat. com/archives ?issue=293. You can learn more about Rust at www. rust-lang.org. This month we’ll learn how to develop TCP/IP servers and clients in Rust

      10 min read

    • UNLIMITED

      How To Develop A RESTful Client In Go

      Nov 16, 2021

      Mihalis Tsoukalos is a systems engineer and technical writer. He’s the author of Go Systems Programming and Mastering Go. You can reach him at @mactsouk. The subject of this month’s tutorial is RESTful services. In particular, you’re going to learn h

      9 min read

    • UNLIMITED

      Types Of Databases

      Aug 27, 2019

      NoSQL databases provide the performance, scalability and stability that’s required by the modern data-driven apps we interact with these days. But that is where the similarity between NoSQL systems end. In fact, it wouldn’t be wrong to say that the o

      1 min read

    • UNLIMITED

      Basic Concepts

      Jul 2, 2019

      A messaging system such as Kafka enables you to send messages between processes, applications and servers. Applications connect to Kafka to send or get data. Strictly speaking, a Kafka ‘topic’ is a unit of storage in Kafka: data in Kafka is stored in

      1 min read

    • UNLIMITED

      Are Docker Containers a Good Idea for Laptops?

      Mar 31, 2020

      Docker containers are cool. If you haven’t yet played with Docker, you’re missing a large world of easily deployed applications. For example, I can deploy NodeRed, Plex, Jupyter Lab, and Nextcloud servers, and run them behind a Traefik reverse proxy

      2 min read

    • UNLIMITED

      Access Your Mac Anywhere

      Nov 8, 2022

      Access Your Mac Anywhere
      2 min read

    • UNLIMITED

      How Tech Firms Are Using China's Social Media Addiction To Teach English

      Mar 14, 2018

      On a recent winter day in Beijing, Ren Li crawls into bed at 3am, worn out after a long day of taking care of her three-month-old daughter. Despite her exhaustion, she is up promptly at 7 in the morning. But the first thing the doctor, 38, reaches fo

      3 min read

    • UNLIMITED

      Ice Cold With Kali

      May 2, 2023

      Ice Cold With Kali
      3 min read

    • UNLIMITED

      Top 10 Programming Languages

      Jan 5, 2023

      Top 10 Programming Languages
      8 min read

    • UNLIMITED

      Metrics & Visuals In Go

      Nov 17, 2020

      Mihalis Tsoukalos is a DataOps engineer and a technical writer. He’s the author of Go Systems Programming and Mastering Go, 2nd edition. The subject of this tutorial is two-fold. First, it’s about creating a Go application that exports metrics to P

      7 min read

    • UNLIMITED

      An Introduction To Rabbitmq

      Jun 29, 2021

      RabbitMQ is a Message Broker, which means that it can safely hold messages generated by applications and make them available to other applications. The main advantages are reliability, support for clustering and high-availability queues, tracing capa

      1 min read

    • UNLIMITED

      Brave Browser 1.48.171

      Apr 4, 2023

      Brave Browser 1.48.171
      2 min read

    • UNLIMITED

      Linux From Scratch

      Feb 8, 2022

      Linux From Scratch
      8 min read

    • UNLIMITED

      How To Use Mojolicious For Web Scraping

      Mar 8, 2022

      Part One Don’t miss next issue! Subscribe on page 16 Mark Gardner is a software developer and blogger with over 25 years of IT experience. You can reach him at www.phoenixtrap.com and @markjgardner. The map function is designed to transform a list or

      5 min read

    • UNLIMITED

      How To Use Mojolicious For Web Scraping

      Mar 8, 2022

      Part One Don’t miss next issue! Subscribe on page 16 Mark Gardner is a software developer and blogger with over 25 years of IT experience. You can reach him at www.phoenixtrap.com and @markjgardner. The map function is designed to transform a list or

      5 min read

    • UNLIMITED

      Discover Easy-to -build Desktop Apps

      Oct 22, 2019

      Electron is actually a browser packaged with node.js and a few APIs. Because it’s built on top of the Chromium browser, you have everything available from there to add to your application. GitHub developed it as part of the Atom editor; it was open-s

      7 min read

    • UNLIMITED

      Create Smaller Sized Apps With React

      Nov 19, 2019

      You may not be surprised that some developers have criticised Electron (see tutorials LXF256), mostly regarding the memory usage of its final binaries. The initial binary is over 100MB, because a major chunk of code from Chrome is embedded. When you

      6 min read

    • UNLIMITED

      Code An Admin Back-end In Django

      Dec 13, 2022

      Credit: www.djangoproject.com OUR EXPERT Matt Holder has been a fan of the open source methodology for over two decades and uses Linux and other tools where possible. More featurepacked source code for this project can be downloaded from https://

      6 min read

    • UNLIMITED

      Websocket

      Mar 7, 2023

      Mihalis Tsoukalos is a systems engineer and a technical writer. He is the author of Go Systems Programming and Mastering Go. You can reach him at @mactsouk. This tutorial covers the WebSocket protocol and how to work with it using the Go programming

      8 min read

    Related categories

    Reviews for Learn JSP in 24 Hours

    0 ratings

    0 ratings0 reviews

    What did you think?

    Tap to rate

    Review must be at least 10 words

      Book preview

      Learn JSP in 24 Hours - Alex Nordeen

      Chapter 1: Introduction

      JSP is used to create a web application. It focuses more on the presentation part of the application. It also separates the presentation layer with the business layer in MVC (which will be learnt in more detail in MVC section).

      JSP stands for Java Server Pages.

      It is a technology which helps to create dynamic pages using HTML, XML.

      It uses Java as a programming language into JSP.

      What is JSP?

      Java Server Pages (JSP) is a technology which is used to develop web pages by inserting java code into the HTML pages by making special JSP tags. The JSP tags which allow java code to be included into it are <% ----java code----%>.

      It can consist of either HTML or XML (combination of both is also possible) with JSP actions and commands.

      It can be used as HTML page, which can be used in forms and registration pages with the dynamic content into it.

      Dynamic content includes some fields like dropdown, checkboxes, etc. whose value will be fetched from the database.

      This can also be used to access JavaBeans objects.

      We can share information across pages using request and response objects.

      JSP can be used for separation of the view layer with the business logic in the web application.

      Why use JSP?

      In Java server pages JSP, the execution is much faster compared to other dynamic languages.

      It is much better than Common Gateway Interface (CGI).

      Java server pages JSP are always compiled before its processed by the server as it reduces the effort of the server to create process.

      Java server pages JSP are built over Java Servlets API. Hence, it has access to all Java APIs, even it has access to JNDI, JDBC EJB and other components of java.

      JSP are used in MVC architecture (which will be covered in MVC architecture topic) as view layer.

      The request is processed by a view layer which is JSP and then to servlet layer which is java servlet and then finally to a model layer class which interacts with the database.

      JSP is an important part of Java EE, which is a platform for enterprise level applications.

      Advantages of JSP

      The advantage of JSP is that the programming language used is JAVA, which is a dynamic language and easily portable to other operating systems.

      It is very much convenient to modify the regular HTML. We can write the servlet code into the JSP.

      It is only intended for simple inclusions which can use form data and make connections.

      JSP can also include the database connections into it. It can contain all type of java objects.

      It is very easy to maintain

      Performance and scalability of JSP are very good because JSP allows embedding of dynamic elements in HTML pages.

      As it is built on Java technology, hence it is platform independent and not depending on any operating systems.

      Also, it includes the feature of multithreading of java into it.

      We can also make use of exception handling of java into JSP.

      It enables to separate presentation layer with the business logic layer in the web application.

      It is easy for developers to show as well as process the information.

      Summary:

      In this tutorial, we have learnt about JSP which is Java server pages

      JSP pages are used as underlying technology is Java which makes it platform independent. It can be done within the HTML and XML pages

      It is very easy and convenient to use JSP over the HTML pages.

      Chapter 2: JSP Life Cycle

      A JSP Page needs to be converted into servlet first in order to process the service requests. Translation of JSP Page into servlet is termed as the life cycle of JSP. It starts with the creation of JSP and ends with the disintegration of that.

      In this tutorial, you will learn-

      Different phases of JSP Life Cycle.

      When the browser asks for a JSP, JSP engine first checks whether it needs to compile the page. If the JSP is last compiled or the recent modification is done in JSP, then the JSP engine compiles the page.

      Compilation process of JSP page involves three steps:

      Parsing of JSP

      Turning JSP into servlet

      Compiling the servlet

      JSP Lifecycle is depicted in the below diagram.

      Following steps explain the JSP life cycle:

      Translation of JSP page

      Compilation of JSP page(Compilation of JSP page into _jsp.class)

      Classloading (_jsp.java is converted to class file _jsp.class)

      Instantiation(Object of generated servlet is created)

      Initialisation(_jspinit() method is invoked by container)

      Request Processing(_jspservice() method is invoked by the container)

      Destroy (_jspDestroy() method invoked by the container)

      Let us have more detailed summary on the above points:

      Translation of the JSP Page:

      A Java servlet file is generated from a JSP source file. This is the first step of JSP life cycle. In translation phase, container validates the syntactic correctness of JSP page and tag files.

      The JSP container interprets the standard directives and actions, and the custom actions referencing tag libraries (they are all part of JSP page and will be discussed in the later section) used in this JSP page.

      In the above pictorial description, demo.jsp is translated to demo_jsp.java in the first step

      Let's take an example of demo.jsp as shown below:

      Demo.jsp

      Demo JSP

      <%

      int demovar=0;%>

      Counc is:

      <% Out.printIn(demovar++)

       

       

      Code Explanation for Demo.jsp

      Code Line 1: html start tag

      Code Line 2: Head tag

      Code Line 3 - 4: Title Tag i.e. Demo JSP and closing head tag

      Code Line 5,6: Scriptlet tag wherein initializing the variable demo

      Code Line 7 - 8: In body tag, a text to be printed in the output (Count is: )

      Code Line 9: Scriplet tag where trying to print the variable demovar with incremented value

      Code Line 10-11: Body and HTML tags closed

      Demo JSP Page is converted into demo_jsp servlet in the below code.

      Public class demp_jsp extends HttpServlet{

      Public void _]sp3ervice(HttpServletRequest request, HttpServletResponse response) Throws IOException, ServletException

      {

      PrintWriter out = response.getKriter<);

      response.3etContentType(text/html);

      out .write <) ;

      int demovar=0;

      out.write(Count is:);

      out.print(demovar++);

      out .write () ;

      }

      }

      Code explanation for Demo_jsp.java

      Code Line 1: Servlet class demo_jsp is extending parent class HttpServlet

      Code Line 2,3: Overriding the service method of jsp i.e. _jspservice which has HttpServletRequest and HttpServletResponse objects as its parameters

      Code Line 4: Opening method

      Code Line 5: Calling the method getWriter() of response object to get PrintWriterobject (prints formatted representation of objects to text output stream)

      Code Line 6: Calling setContentType method of response object to set the content type

      Code Line 7: Using write () method of PrintWriter object trying to parse html

      Code Line 8: Initializing demovar variable to 0

      Code Line 9: Calling write() method of PrintWriter object to parse the text

      Code Line 10: Calling print() method of PrintWriter object to increment the variable demovar from 0+1=1.Hence, the output will be 1

      Code Line 11: Using write() method of PrintWriter object trying to parse html

      Output:

      JSP Life Cycle

      Here you can see that in the screenshot theOutput is 1 because demovar is initialized to 0 and then incremented to 0+1=1

      In the above example,

      demo.jsp, is a JSP where one variable is initialized and incremented. This JSP is converted to the servlet (demo_jsp.class ) wherein the JSP engine loads the JSP Page and converts to servlet content.

      When the conversion happens all template text is converted to println() statements and all JSP

      Enjoying the preview?
      Page 1 of 1
      pFad - Phonifier reborn

      Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.

      Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.


      Alternative Proxies:

      Alternative Proxy

      pFad Proxy

      pFad v3 Proxy

      pFad v4 Proxy