Servlet

Servlet Filter Basics and History A servlet filter is a Java component introduced in the Servlet 2.3 specification in 2001. It intercepts HTTP requests before servlets handle them and responses before they are returned to clients, making it useful for preprocessing and postprocessing tasks. This makes it easier to implement cross-cutting concerns such as authentication, logging, character encoding, and data compression in a reusable way separate from business logic. Filters are based on the Chain of Responsibility design pattern, so multiple filters can be linked together and executed in sequence. ...