The problem is that the server is not able to find your servlet. Please check wheather the corresponding class file (with package structure) is in WEB-INF/classes folder or not.
javap command converts .class to .java. But only methods and variables get generated And you can also use third party softwares like DJ Java Decompiler..
Business logic is in a re-usable component on the server, so you can easily re-use it in other webapps, or in other client types (e.g. PDA, Swing client)
