File list (Check if you may need any files):
HelloWorldWeb\.classpath
.............\.project
.............\.settings\.jsdtscope
.............\.........\org.eclipse.jdt.core.prefs
.............\.........\org.eclipse.wst.jsdt.ui.superType.container
.............\.........\org.eclipse.wst.jsdt.ui.superType.name
.............\build\classes\edu\nju\helloworld\servlets\HelloWorld.class
.............\src\edu\nju\helloworld\servlets\HelloWorld.java
.............\WebContent\META-INF\MANIFEST.MF
.............\build\classes\edu\nju\helloworld\servlets
.............\.....\.......\...\...\helloworld
.............\src\edu\nju\helloworld\servlets
.............\build\classes\edu\nju
.............\src\edu\nju\helloworld
.............\build\classes\edu
.............\src\edu\nju
.............\WebContent\WEB-INF\lib
.............\build\classes
.............\src\edu
.............\WebContent\META-INF
.............\..........\WEB-INF
.............\.settings
.............\build
.............\src
.............\WebContent
HelloWorldWeb