1. Markus Hjort Reaktor Innovations Java Web Development T-111.4360 WWW-palvelun suunnittelu @ HUT 4.3.2008

2. Goals Tonight  I hope you all get  Short introduction to Java Web Development  Understanding how Java tries to solve real world problems within web development!

3. The Big Picture

4. Standards  Java Applets  Java Servlets  Java Server Pages (JSP) ‏  Java Server Faces (JSF) ‏  Java Portlets

5. Open Source Frameworks  Struts  WebWork  GWT (Google Web Toolkit) ‏  Tapestry ‏  Wicket ‏ ...

6. Servlet Containers (Application Servers) ‏  Tomcat  Jetty  Bea WebLogic  IBM WebSphere  Caucho Resin ...

7. Typical applications  Static web sites  Dynamic web sites  Web-based Products

8. The Challenges of Web Development*  Web interfaces change frequently  Web interfaces involve complex markup  Web interfaces use a very different model compared to traditional Uis in languages such as Java * Rod Johnson: J2EE Design and development

9. The Challenges of Web Development  HTTP requests can carry only string parameters  Web interfaces make it difficult to validate user input, as we have limited control over over the client browser  HTML offers a limited choice of UI controls

10. The Challenges of Web Development  Ensuring that a web site looks right and works correctly in all all common browsers can be difficult  There are many efficiency considerations  Web interfaces are relatively hard to test

11. Lessons Learned In Java Web Development

12. Epic fails  The shortcomings of Servlet-only solutions  “JSP Model 1” Architecture

13. OO is important!

14. Reuse

15. Testability

16. Model View Controller (MVC) ‏

17. Front Controller Pattern  Controller uses model for business logic  Controller forwards to view  View shows model values

18. Component Frameworks

19. Html Components  Links  Labels  Images ...  You can easily create your own custom components

20. Thank you!

21. Links  JSP Tutorial: http://www.jsptut.com/http://www.jsptut.com/  Wicket: http://apache.wicket.org/http://apache.wicket.org/  MVC: http://en.wikipedia.org/wiki/Model-view-controllerhttp://en.wikipedia.org/wiki/Model-view-controller  JDBC (for database access): http://java.sun.com/docs/books/tutorial/jdbc/overview/index.html http://java.sun.com/docs/books/tutorial/jdbc/overview/index.html