The javax.servlet package contains a number of classes and interfaces that describe and define the contracts between a servlet class and the runtime environment provided for an instance of such a class by a conforming servlet container.
ClassDescriptionProvides the context for asynchronous request handlingUsed to pass data to the methods of
AsyncListener.Listener for events associated with an
AsyncContext.Enumeration of dispatcher types.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.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.A filter configuration object used by a servlet container to pass information to a filter during initialization.Interface through which a Filter may be further configured.Interface through which a Filter registered via one of the addFilter methods on ServletContext may be further configured.Provides a base class that implements the Filter and FilterConfig interfaces to reduce boilerplate when writing new filters.Defines a generic, protocol-independent servlet.Equivalent of
HttpConstraintfor programmatic configuration of security constraints.Programmatic equivalent of a security constraint defined for a single HTTP method.The programmatic equivalent of
MultipartConfigused to configure multi-part handling for a Servlet when registering a Servlet via code.Receives notification of read events when using non-blocking IO.Common interface for the registration of Filters and Servlets.Interface through which a Servlet or Filter registered via one of the addServlet or addFilter methods, respectively, on ServletContext may be further configured.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.Defines methods that all servlets must implement.A servlet configuration object used by a servlet container to pass information to a servlet during initialization.ServletContainerInitializers (SCIs) are registered via an entry in the file META-INF/services/javax.servlet.ServletContainerInitializer that must be included in the JAR file that contains the SCI implementation.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.This is the event class for notifications about changes to the attributes of the servlet context of a web application.Implementations of this interface receive notifications of changes to the attribute list on the servlet context of a web application.This is the event class for notifications about changes to the servlet context of a web application.Implementations of this interface receive notifications about changes to the servlet context of the web application they are part of.Defines a general exception a servlet can throw when it encounters difficulty.Provides an input stream for reading binary data from a client request, including an efficient
readLinemethod for reading data one line at a time.Provides an output stream for sending binary data to the client.Interface through which a Servlet may be further configured.Interface through which a Servlet registered via one of the addServlet methods on ServletContext may be further configured.Defines an object to provide client request information to a servlet.This is the event class for notifications of changes to the attributes of the servlet request in an application.A ServletRequestAttributeListener can be implemented by the developer interested in being notified of request attribute changes.Events of this kind indicate lifecycle events for a ServletRequest.A ServletRequestListener can be implemented by the developer interested in being notified of requests coming in and out of scope in a web component.Provides a convenient implementation of the ServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet.Defines an object to assist a servlet in sending a response to the client.Provides a convenient implementation of the ServletResponse interface that can be subclassed by developers wishing to adapt the response from a Servlet.The programmatic equivalent of
ServletSecurityused to configre security constraints for a Servlet.Configures the session cookies used by the web application associated with the ServletContext from which this SessionCookieConfig was obtained.Defines the permitted options for configuring the session tracking mode.Deprecated.As of Java Servlet API 2.4, with no direct replacement.Defines an exception that a servlet or filter throws to indicate that it is permanently or temporarily unavailable.Receives notification of write events when using non-blocking IO.