Struts 2 0 tutorial

Presented By: Prof. Vinod Pillai.
(M) 9909023599




Agenda
 Part – I : Understanding Struts.
 Introduction.
 Jakarta Struts.
 Struts 2 Architecture.
 Part – II : Setting Up Struts.
 Getting required Packages.
 “Welcome to Struts 2” – Application.
 Part – III : Application Development.
 10 Applications using Struts 2.
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Part – I
Understanding
Struts
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Introduction
 Java Application = Desktop || Web || Mobile.

 Struts = Apache Struts Web Framework.
 Framework:
 Peace of Software that Automates all tedious

task.
 Use Design patterns commonly agreed by
Industry.
 In built features that commonly needed by most
of project.
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Jakarta Struts
 The Apache Struts web framework is a free open-

source solution for creating Java web applications.
 Apache Struts was launched in May 2000, with
version 1.0 officially released in July 2001.
 Why we need it?
 Web applications based on JSP sometimes combines

database code, page design code, and control flow code.
 In practice, we find that unless these concerns are
separated, larger applications become difficult to
maintain.
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Jakarta Struts
 One way to separate concerns in a software

application =>
architecture.
 MVC

Model-View-Controller

(MVC)

 Model = Business or database code
 View = Page design code
 Controller = Navigational code.

 Struts framework is designed to help developers

create web applications that utilize a MVC
architecture.
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Model View Controller (MVC)

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Struts 2
 Apache Struts Project offers two major versions:
 Struts 1 is recognized as the most popular web application

framework for Java.
 Struts 2 was originally known as WebWork 2.WebWork
and Struts communities joined forces to create Struts 2.

 Struts 2 is a pull-MVC framework. i.e. the data that is to
be displayed to user has to be pulled from the Action.
 Action class in Struts 2 act as the model in the web
application.
 Unlike Struts, Struts 2 Action class are plain POJO
objects thus simplifying the testing of the code.
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Struts 2
 Struts2 also comes with power APIs to configure
Interceptors that reduce greatly the coupling in
application.
 The view part of Struts 2 is highly configurable and it
supports different result-types such as Velocity,
FreeMarker, JSP, etc.

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Struts 2 Architecture

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Struts 2 Architecture
1.
2.

3.

4.
5.

Request is generated by user and sent to Servlet
container.
Servlet container invokes FilterDispatcher filter which in
turn determines appropriate action.
One by one Intercetors are applied before calling the
Action. Interceptors performs tasks such as Logging,
Validation, File Upload, Double-submit guard etc.
Action is executed and the Result is generated by
Action.

The output of Action is rendered in the view (JSP,
Velocity, etc) and the result is returned to the user.
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Part – II
Setting Up
Struts
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Setting Up Struts
*Before we start we need the following tools:

 JDK 1.7 (Download)

 Eclipse Java EE IDE for Web Developers (Indigo)
 Tomcat 7 or any other container (Glassfish, JBoss,
Websphere, Weblogic etc) (Download)
 Apache Struts-2.0.6 JAR (Download)

 MySQL Database.
 MySQL Query Browser.
 MySQL Java JAR File – Database connectivity.
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JDK 1.7

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Eclipse Java EE IDE

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Apache Tomcat 7

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Apache Struts 2

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MySQL

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Setting Up Struts
 JDK 1.7 = .exe
 Eclipse Java EE IDE = zip
 Tomcat 7 = zip

 Apache Struts-2.0.6 JAR = zip
 MySQL Database = .exe
Simply Install the software & make sure you remember the
path.

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Setting Up Struts

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1
“Welcome to Apache Struts 2”
Our Goal :
 Our goal is to create a basic Struts2 application with a
Submit Button.
 User will click on the button and the page will be redirected
to a Welcome page which will display message “Welcome to
Apache Struts 2”.

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Getting Started
 Start Eclipse and enter the workspace name:

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 Open Eclipse and go to File -> New -> Project and select

Dynamic Web Project in the New Project wizard screen.

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 Project Name: Welcome Struts. Target runtime:
New Runtime> & show the path where you have unzipped
the Tomcat Server. Dynamic web module version: 2.5.

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 Copy JAR files in WebContent -> WEB-INF -> lib folder.

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