An overview of Java Servlet technology,WebWork, Spring IoC and Apache Maven.

1. Developing Java Web Applications Dr. Harry Chen CMSC 491S/691S February 11, 2008

3. A canonical Web architecture Do you see any technical issues in this architecture? Source: http://www.ibm.com/developerworks/ibm/library/it-booch_web/

10. Java Servlet technology

12. HelloWorld Servlet Set HTTP Header: Content-Type (HTML) Creates the HTML page content Implementation that handles HTTP GET request Outputs the HTML into the HTTP Response Do you see any technical issues with this implementation? Source: http://www.informit.com/articles/article.aspx?p=26920

14. HelloWorld JSP Source: http://mainline.brynmawr.edu/~dkumar/JSP/ Use Java as if it’s a scripting language

20. WebWork

23. WebWork workflow Read: http://www.javaworld.com/javaworld/jw-03-2004/jw-0329-webwork.html

25. Action: HelloWorld.java Extends a standard Action superclass. Implement the business logic How to access the Bean (the message)

26. View: helloworld.jsp Use JSP Tag lib to access our Bean (the message) If you don’t like to use JSP, you have other options: Freemarker and Velocity

28. WebWork: HelloWorld Output Read: http://www.javaworld.com/javaworld/jw-10-2005/jw-1010-webwork.html

29. Spring IoC

35. Spring IoC: a more complex example (1) The Class object “folderTagListener” is dynamically associated with “bookmarkManager” via a configuration file, not hardwired in the source of “bookmarkManager”. (2) Developers also fine tune the number of WorkerThread to be instantiated by “bookmarkManager” in the same configuration file. (1) (2)

36. Apache Maven

41. Maven: Create a project

42. Maven: POM file

43. Maven: build package

44. Try Maven in 5 minutes http://maven.apache.org/guides/getting-started/maven-in-five-minutes.html