java.lang.ClassNotFoundException: HelloServlet at org.apache.catalina.loader.WebappClassLoader.loadClass

Question

I have a Hello World servlet in webapps/hello/WEB-INF/class/HelloServlet.class and I registered it as below in web.xml:

Answer 1

The main problem is that your servlet class doesn't have a package. Declare one.

package com.example;

public class HelloServlet extends HttpServlet {

And when registering in web.xml, make sure you include the package:

com.example.HelloServlet

Also, your class file should be inside the /WEB-INF/classes directory, not /WEB-INF/class.

webapps/hello/WEB-INF/classes/com/example/HelloServlet.class