Use cases for @WebInitParam

Question

Since the Servlet 3.0 specification there is the possibility of declaring servlet mapping metadata as annotation on the servlet class:

@WebServlet(name=\"appInfo         


        

Answer 1

The annotations are used to give the default values.

In JavaEE the deployment properties can also be provided using annotations. Given the values for annotations, the deployment descriptor i.e, web.xml can still be used to override the default values provided by the annotations.

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In the example above, the init-param can be overriden by configuring a servlet with a matching name in web.xml:

  
    appInfoServlet
    
        ocwd.deployer.email
        noreply@example.com