Struts Presentation

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Struts
Web Technologies – Struts – WS 2010/11
Felix Matenaar, Ivan Golod
Patrick Schlebusch, Petru Nicolaescu

2. 18.11.10 Web Technologies
History
 Server-side for dynamic web pages and web applications:
 Common Gateway Interface – CGI
 Overloaded server
 ISAPI and Apache DSO
 ASP
 Java
 JavaServer Pages – JSP
 Java servlets
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3. 18.11.10 Web Technologies
Motivation
 Model 1:
 JSP handles all responsibilities:
 Processing request
 Validating data
 Handling business logic
 Generating response
 Good for small projects
 Disadvantage:
 Page design is intermixed with business logic
 Inadmissible for big projects
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4. Web Technologies3 22.11.2010 Web Technologies
MVC
ViewModel
Controller
 Model 2:
 Separates display of content from business logic
 Model-View-Controller Pattern
 Invented in Smalltalk at Xerox
 Model - behavior and data
 View - renders the model
 Controller – receives input and initiates a response

5. 18.11.10 Web Technologies
What is Struts?
 Framework for MVC in Java Web Applications
 Components:
 Extensible controller implementation
 Front controller
 Own servlets realize actual functionality
 Tag libraries for the JSPs
 HTML Forms
 Internationalization
 AJAX
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6. 18.11.10 Web Technologies
MVC In Struts
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View
JSP
Tags
Model
Java Beans
Controller
ActionServlet
Action
struts-config.xml
ActionForm

7. 18.11.10 Web Technologies
Architecture & Request Life Cycle
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Front Controller Action
Template
(e.g. JSP)
Configuration
request
response Provided by Struts
Created by developer
Interceptor (Struts 2)
Tags
result

8. 18.11.10 Web Technologies
Action; Action Form
 The Action class
 execute() : ActionForward
 ActionForward, associated with current request
 Configuring the action classes
 The ActionForm
 Associated with html form
 Respects JavaBean specification
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9. 18.11.10 Web Technologies
Configuration File: struts-config.xml
 Available under “WebContentWEB-INF”
 ActionForm declaration
 Action Mappings
 General mapping
 any request to a resource with .do extension will be
taken by Struts’ ActionServlet
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10. A whole bunch of frameworks
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Django
Ruby on Rails
Zend
Solarphp
Typo3
Google Web Tookit
Struts
Web2py
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11. Criteria
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 performance
 user feeling
 infrastructure costs
 security
 availability
 data loss → image loss
 development speed
 time to market
 always offer latest technology
Not only the framework design but also the programming
Language influence the applicability
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12. Cursory comparison
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Criteria Struts Django Zend Rails
Language Java Python PHP Ruby
Typing Strict Duck Duck Duck
Concept MVC MVC MVC MVC
Performance ++ - - -
Security o + - - ++
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13. Summary
 Big projects should separate
business logic and presentation
 Struts is an MVC framework
 Java
 Scalable
 Controller -> Actions
 View -> JSP
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14. The end
Thank you!
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15. 18.11.10 Web Technologies
Literature
 http://struts.apache.org
Framework Download, Documentation, Tutorials, etc..
 Ian Roughley - „Starting With Struts 2“
(http://www.infoq.com/minibooks/starting-struts2)
 James Holmes - „Struts: The Complete Reference“
 http://www.javauc.com/java/727