Difference between ServletConfig and ServletContext
Difference : ServletContext vs ServletConfig
ServletContext | ServletConfig |
---|---|
Servlet Context is a global configuration for servlets in a an application i.e this is same for all the servlets. | Servlet Config is a local configuration for each servlet in an application i.e each servlet has its own servlet configuration that may differ from the servlet config of another servlet. |
ServletContext is one per application. | ServletConfig is one per servlet. |
It is created at the time of deployment of the web application. | It is initialized when a servlet is initialized. |
Its scope is as long as the application is up and running, it will be destroyed when the application is removed from the server. | Its scope isand is destroyed when a servlet is destroyed by the servlet container. |
In web.xml it should be declared as <context-param> tag and it should be under <web-app> tag. | In web.xml it should be declared as <init-param> under <servlet-class> tag. |
ServletContext object will be available even before giving the first request | We should give request explicitly, in order to create ServletConfig object for the first time |
Example
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