File list (Check if you may need any files):
struts2Tree\.classpath
...........\.mymetadata
...........\.project
...........\.settings\.jsdtscope
...........\.........\org.eclipse.wst.jsdt.ui.superType.container
...........\.........\org.eclipse.wst.jsdt.ui.superType.name
...........\src\action\SimpleTreeAction.java
...........\...\data\Category.java
...........\...\.b\DBConn.java
...........\...\service\CategoryService.java
...........\...\struts.xml
...........\WebRoot\META-INF\MANIFEST.MF
...........\.......\Tree.jsp
...........\.......\WEB-INF\classes\action\SimpleTreeAction.class
...........\.......\.......\.......\data\Category.class
...........\.......\.......\.......\.b\DBConn.class
...........\.......\.......\.......\service\CategoryService.class
...........\.......\.......\.......\struts.xml
...........\.......\.......\lib\commons-logging-1.0.4.jar
...........\.......\.......\...\freemarker-2.3.8.jar
...........\.......\.......\...\ognl-2.6.11.jar
...........\.......\.......\...\struts2-core-2.0.11.1.jar
...........\.......\.......\...\xwork-2.0.4.jar
...........\.......\.......\web.xml
...........\.......\.......\classes\action
...........\.......\.......\.......\data
...........\.......\.......\.......\db
...........\.......\.......\.......\service
...........\.......\.......\classes
...........\.......\.......\lib
...........\src\action
...........\...\data
...........\...\db
...........\...\service
...........\WebRoot\META-INF
...........\.......\WEB-INF
...........\.myeclipse
...........\.settings
...........\src
...........\WebRoot
struts2Tree