Java Web Programming [7/9] : Struts2 Basics

Java Web Programming [7/9] : Struts2 Basics

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  Module 7: Struts2 Basics Thanisa Kruawaisayawan Thanachart Numnonda www.imcinstitute.com
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  Apache Struts  Struts is an open source Web application framework developed as Apache Jakarta project  http://jakarta.apache.org/struts/  Model-View-Controller (MVC) framework  Used for constructing web applications based Servlets and JSP technologies  Strutsapplication is a genuine Web application that should be able to run on any Servlet container including all Java EE compliant App servers 2
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  Why Struts?  Takesmuch of the complexity out of building your own MVC framework  Encourages good design practice and modeling  Easy to learn and use  Feature-rich and many supported 3rd-party tools  Flexible and extensible  Large user community  Stable and mature  Open source 3
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  How Struts 2Works 4
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  Our Goal 5
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  Steps 1. Write JSPpages (View) 2. Write Action class (Model) 3. Forward at either success or error through configuration set in struts.xml 4. Build, deploy, and test the application 6
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  Step 1: WriteJSP pages 7
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  JSP Pages  Writeone JSP page for each view  Use Struts tags for  Handing HTML input forms  Writing out messages 8
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  login.jsp 9
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  welcome.jsp 10
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  Step 2: Write Actionclasses 11
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  Action Class Extend com.opensymphony.xwork2.ActionSupport class  Decide set of properties that reflect the input form  Write getter and setter methods for each property  Write execute() method 12
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  LoginAction.java 13
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  Step 3: Config struts.xml 14
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  struts.xml  Identify required Action's and then define them as <action> elements 15
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  Step 5: Build,Deploy, and Test Application 16
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  Results 17
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  Acknowledgement Most contentsare borrowed from the presentation slides of Sang Shin, Java™ Technology Evangelist, Sun Microsystems, Inc. 18
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  Thank you thananum@gmail.com www.facebook.com/imcinstitute www.imcinstitute.com 19