1. Struts

2. Agenda Preface Struts and its components An example The architecture required for Struts Applications

3. Preface Problem we faced when designing JSP: Familiar with HTML and expertise in web design (the content, font, color, web page layout etc.) Having Programming knowledge with Java (embedded java code in JSP)

4. Break down the tasks with Struts

5. What is Struts Norwegian word meaning ostrich A Java open source framework especially used for web application development. With Struts, developers can following the MVC design pattern to design web application

6. What is MVC design pattern InputProcessingOutput ControllerModelView Calculation, database operation, connection with remote systems Application screen, web pages

7. Controller in Struts Called ActionServlet Its functions: - Receive http request from client (Web browser) - Invoke Model part by calling Action objects - Send the JSP file returned by Action objects back to the client

8. Model component in Struts In Action objects Its functions: - Carrying out business related processing (by itself or other objects) - Determining the next web page to send to the client

9. View component in Struts Html and JSP files with Struts tags embedded Features provided by Struts tags: - Sophisticated html form handling (validation, error display etc.) - Display localized messages stored in a resource file on web page (message tag) - And many others …

10. How to get M V C parts work together A configuration file called struts-config.xml in XML format Defines Action classes, Java Beans used in the project Define “virtual” paths to be used in JSP files

11. An example In TestWeb1.jsp: … In struts-config.xml: … If changing to use another java bean as Action class in the future,…

12. The whole process of a client request ActionServlet Action object JavaBean1 JSP / HTML files nextpage1.jsp Call “action1” ActionForward next1 Client request find

13. The architecture required for Struts Applications Struts Applications Struts classes / Taglib Java Application Server JSP / Servlet engine

14. Summary Breakdown web development into MVC parts Easy to develop and maintain

15. Questions?