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By Jaydip Lakhatariya

Web framework and Struts 2

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▪ Traditional JSP/Servlet Web Application

▪ MVC Pattern

▪ MVC with JSP/Servlet

▪ Web frameworks

▪ Overview of Struts 2

▪ Features

▪ Architecture of struts

▪ Comparison

Agenda

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• Servlet with only some special methods (doGet(), doPost(), …)

• JSPs (Java Server Pages) : HTML (or other) code with embedded Java code (Scriptlets)

• JSPs with JSTL (JSP Standard Tag Library)

Traditional JSP/Servlet Web Application

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▪ Splits up responsibilities for handling user interactions in an application into

three layers:

▪ Model

▪ View

▪ Controller

The Model-View-Controller Pattern

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Traditional JSP/Servlet Web Application

5

Servlet Jsp files

Java functions

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Web framework

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• A piece of structural software

• Make generalizations about the common tasks and workflow of a specific domain.

• Provide a platform upon which applications can be more quickly built

• Automate some tedious tasks of the domain.

• Introduce an elegant architectural solution.

• Provides rich set of features

• Frameworks would save time and resource.

Web Frameworks

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Web Frameworks

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▪ An open-source web application framework

▪ Based on the MVC design pattern

▪ Uses and extends the Java Servlet API to adopt model–view–controller

(MVC) architecture.

▪ Favors convention over configuration.

▪ Many supported third-party tools

▪ Flexible & Expandable

▪ Rich tag library

▪ Large User Community

Struts 2 framework

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• POJO forms and POJO actions

• Tag support

• AJAX support

• Easy Integration (Spring, tiles, sitemesh)

• Template Support

• Plugin Support

• Profiling

• Easy to modify tags

• Promote less configuration

• Various Result Types

Features

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• Action

• Interceptors

• View

• Configuration files (struts.xml, web.xml, struts.properties)

Components

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Architechture

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Request life cycle

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1. User sends a request to the server for requesting for some resource (i.e pages).

2. The FilterDispatcher looks at the request and then determines the appropriate

Action.

3. Configured interceptors functionalities applies such as validation, file upload etc.

4. Selected action is executed to perform the requested operation.

5. Again, configured interceptors are applied to do any post-processing if required.

6. Finally the result is prepared by the view and returns the result to the user.

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Comparision

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Struts 2 Spring

Ajax support Yes No

Rich tag library Yes No

Community Has wide availability Behind struts

Transaction management

No Yes

Lightweight framework No Yes

Design perspective Not strong as spring Strong

Tools No Spring IDE

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THANK YOU

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