Servlet Filter Tutorial Theory
Servlet JSP tutorial playlist : https://goo.gl/y1kvwc
A filter is an object that performs filtering tasks on either the request to a resource (a servlet or static content), or on the response from a resource, or both.
Filters perform filtering in the doFilter method.
Every Filter has access to a FilterConfig object from which it can obtain its initialization parameters, a reference to the ServletContext which it can use, for example, to load resources needed for filtering tasks.
Filters are configured in the deployment descriptor of a web application
Examples that have been identified for this design are
1) Authentication Filters
2) Logging and Auditing Filters
3) Image conversion Filters
4) Data compression Filters
5) Encryption Filters
6) Tokenizing Filters
7) Filters that trigger resource access events
8) XSL/T filters
9) Mime-type chain Filter
In this video we will see :
Filters in servlet
What is filter in servlet
Why we need servlet filter
What is Filterchain
How to create filter
init()
doFilter()
destroy()
Configuring Filter
FilterConfig()
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