File list (Check if you may need any files):
CheckCode\.classpath
.........\.mymetadata
.........\.project
.........\.settings\.jsdtscope
.........\.........\org.eclipse.jdt.core.prefs
.........\.........\org.eclipse.wst.jsdt.ui.superType.container
.........\.........\org.eclipse.wst.jsdt.ui.superType.name
.........\src\com\demo\servlet\ImageServlet.java
.........\...\...\....\.......\ValidateCodeServlet.java
.........\WebRoot\CheckImage.jsp
.........\.......\Image.jsp
.........\.......\index.jsp
.........\.......\META-INF\MANIFEST.MF
.........\.......\showCode.jsp
.........\.......\WEB-INF\classes\com\demo\servlet\ImageServlet.class
.........\.......\.......\.......\...\....\.......\ValidateCodeServlet.class
.........\.......\.......\web.xml
.........\.......\.......\classes\com\demo\servlet
.........\.......\.......\.......\...\demo
.........\src\com\demo\servlet
.........\WebRoot\WEB-INF\classes\com
.........\src\com\demo
.........\WebRoot\WEB-INF\classes
.........\.......\.......\lib
.........\src\com
.........\WebRoot\META-INF
.........\.......\WEB-INF
.........\.myeclipse
.........\.settings
.........\src
.........\WebRoot
CheckCode