What is filter what is its use list different filter interfaces with their important methods?
1) Filter interface.
|public void init(FilterConfig config)||init() method is invoked only once. It is used to initialize the filter.|
Correspondingly, what is the use of filter in Web XML?
Filters are used for filtering functionality of the Java web application. They manipulate the responses from the server and sent to the client.
Also Know, what is a filter chain? javax.servlet public interface FilterChain. A FilterChain is an object provided by the servlet container to the developer giving a view into the invocation chain of a filtered request for a resource.
People also ask, what is the sequence of method execution in filter?
This method is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain. This method is called by the web container to indicate to a filter that it is being placed into service.
How do I map a filter in Web XML?
The filter-mapping element maps a URL pattern or servlet name to an instance of a filter. The filter-mapping always contains a filter-name element and a url-pattern element. The filter-name element must match a filter-name defined in a filter element elsewhere in the web. xml file.