Difference between ServletConfig and ServletContext

ServletConfig

·         ServletConfig available in javax.servlet.*; package

·         ServletConfig object is one per servlet class

·         Object of ServletConfig will be created during initialization process of the servlet

·         This Config object is public to a particular servlet only

·         Scope: As long as a servlet is executing, ServletConfig object will be available, it will be destroyed once the servlet execution is completed.

·         We should give request explicitly, in order to create ServletConfig object for the first time

·         In web.xml – <init-param> tag will be appear under <servlet-class> tag

ServletContext

·         ServletContext available in javax.servlet.*; package

·         ServletContext object is global to entire web application

·         Object of ServletContext will be created at the time of web application deployment

·         Scope: As long as web application is executing, ServletContext object will be available, and it will be destroyed once the application is removed from the server.

·         ServletContext object will be available even before giving the first request

·         In web.xml – <context-param> tag will be appear under <web-app> tag