Filter | A filter is an object than perform 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. |
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. |
FilterConfig |
A filter configuration object used by a servlet container
used to pass information to a filter during initialization. |
RequestDispatcher | Defines an object that receives requests from the client
and sends them to any resource (such as a servlet,
HTML file, or JSP file) on the server. |
Servlet | Defines methods that all servlets must implement. |
ServletConfig |
A servlet configuration object used by a servlet container
used to pass information to a servlet during initialization. |
ServletContext |
Defines a set of methods that a servlet uses to communicate with its
servlet container, for example, to get the MIME type of a file, dispatch
requests, or write to a log file. |
ServletContextAttributeListener | Implementations of this interface recieve notifications of
changes to the attribute list on the servlet context of a web application. |
ServletContextListener | Implementations of this interface recieve notifications about changes to the servlet context of the web application they are part of. |
ServletRequest | Defines an object to provide client request information to a servlet. |
ServletResponse | Defines an object to assist a servlet in sending a response to the client. |
SingleThreadModel | Ensures that servlets handle
only one request at a time. |