my servlet is not found - servlets

Question

i'm trying to use a servlet for the first time (and i'm a very bad web developer during my spare time).
I create a servlet and i put it into a folder with all my other classes (javabean). The package where i put my classes is called Jeans.
I made a page that calls the servlet when it is submitted (after pressing a submit button).
<form action="prova" method="post" id="FormNews" name="FormNews">
//prova is the name of the servlet
I can see that in web.xml there is my servlet
<servlet>
<description></description>
<display-name>prova</display-name>
<servlet-name>prova</servlet-name>
<servlet-class>prova</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>prova</servlet-name>
<url-pattern>/prova</url-pattern>
</servlet-mapping>
But when i trying to see my servlet on a browser i get this error
javax.servlet.ServletException: Wrapper cannot find servlet class prova or a class it depends on
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
java.lang.Thread.run(Unknown Source)
What should i do to use a servlet? Probably i have to set somewhere its path...
Probably TomCat can't see my servlet is in the folder my_web_application_name/jeans
Thank you guys

Answer 1

The package where i put my classes is called Jeans
Then your first line of servlet prova.java
package jeans; //use small case package name
public class Prova extends HttpServlet { //see the class name, this is by java naming conventions
....
.......
}
Also, web.xml
<servlet>
<description></description>
<display-name>Prova</display-name>
<servlet-name>Prova</servlet-name>
<servlet-class>jeans.Prova</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Prova</servlet-name>
<url-pattern>/Prova</url-pattern>
</servlet-mapping>
Useful link:
java-naming-conventions
servlets info

Answer 2

Your class is not available in the class path. Ensure its available. If you put in a package, ensure you compile it using package declaration. Once you manually copy the class file , restart the application server. In Web.xml declare the class with package name.
You probably need a tutorial on how to write a servlet.
http://www.mkyong.com/servlet/a-simple-servlet-example-write-deploy-run/

Answer 3

You have to put fully qualified class name into <servlet-class>
Example :
<servlet-class>examples.servlets.HelloWorld</servlet-class>

Answer 4

Thanks everybody.
My error was on the "servlet-class" tag.
I wrote
<servlet-class>Prova</servlet-class>
Instead of
<servlet-class>jeans.Prova</servlet-class>
where jeans was the folder where i put my class.