ServletContext is a interface which helps us to communicate with the servlet container. There is only one ServletContext for the entire web application and the components of the web application can share it.

The Mapping of the Context init parameters in web.xml as:

<servlet>
    <servlet-name>Mapping</servlet-name>
    <servlet-class>ContextMapping</servlet-class>
</servlet>

<context-param>
    <param-name>Email</param-name>
    <param-value>[email protected]</param-value>
</context-param>

Again we access the Init parameter in the servlet using ServletContext :

ServletContext context = getServletContext();
pw.println(context.getInitParameter("Email");

ServletContext:

scope: Whenever we deploy the web application in the server the server create one object to ServletContext implementation class.It mean each web application contain on ServletContext object and also the server remove the ServletContext object in the given scenarios. 1) undeploy the web appliation 2) suspend the web application 3) stop the server.

uses: 1) to storing and retrieving the information in the application level 2) to finding the information about server 3) to storing the logging information int he logging files. 4) to get the RequestDispatcher object for chaining the web resources.

ServletContext:

scope: Whenever we deploy the web application in the server the server create one object to ServletContext implementation class.It mean each web application contain on ServletContext object and also the server remove the ServletContext object in the given scenarios. 1) undeploy the web appliation 2) suspend the web application 3) stop the server.

uses: 1) to storing and retrieving the information in the application level 2) to finding the information about server 3) to storing the logging information int he logging files. 4) to get the RequestDispatcher object for chaining the web resources.