tomcat servlet java web.xml example

https://developers.google.com/appengine/docs/java/config/webxml#Secure_URLs

 Sample web.xml File

The following sample web.xml deployment descriptor shows how to declare the HelloServlet servlet in the HelloWorld Web application. See also Description of the web.xml File.

<?xml version="1.0" encoding="ISO-8859-1" ?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">

    <display-name>HelloWorld Application</display-name>
    <description>
        This is a simple web application with a source code organization
        based on the recommendations of the Application Developer's Guide.
    </description>

    <servlet>
        <servlet-name>HelloServlet</servlet-name>
        <servlet-class>examples.Hello</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>HelloServlet</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>

</web-app>     

Description of the web.xml File

In the preceding web.xml deployment descriptor file, the <servlet> XML element declares the HelloServlet, the examples.Hello Java class implements the servlet, and the <servlet-mapping> XML element specifies the/hello URL pattern that invokes the servlet in a browser. This URL pattern is used in the index.html file.