javax.servlet (Servlet API Documentation)
Keywords: javax.servlet package

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## Package javax.servlet

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.

See:
Description

Interface Summary
Filter | 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.
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 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 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 receive notifications of changes to the attribute list on the servlet context of a web application.
ServletContextListener | Implementations of this interface receive 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.
ServletRequestAttributeListener | A ServletRequestAttributeListener can be implemented by the developer interested in being notified of request attribute changes.
ServletRequestListener | A ServletRequestListener can be implemented by the developer interested in being notified of requests coming in and out of scope in a web component.
ServletResponse | Defines an object to assist a servlet in sending a response to the client.
SingleThreadModel | Deprecated. As of Java Servlet API 2.4, with no direct replacement.

Class Summary
GenericServlet | Defines a generic, protocol-independent servlet.
ServletContextAttributeEvent | This is the event class for notifications about changes to the attributes of the servlet context of a web application.
ServletContextEvent | This is the event class for notifications about changes to the servlet context of a web application.
ServletInputStream | Provides an input stream for reading binary data from a client request, including an efficient `readLine` method for reading data one line at a time.
ServletOutputStream | Provides an output stream for sending binary data to the client.
ServletRequestAttributeEvent | This is the event class for notifications of changes to the attributes of the servlet request in an application.
ServletRequestEvent | Events of this kind indicate lifecycle events for a ServletRequest.
ServletRequestWrapper | Provides a convenient implementation of the ServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet.
ServletResponseWrapper | Provides a convenient implementation of the ServletResponse interface that can be subclassed by developers wishing to adapt the response from a Servlet.

Exception Summary
ServletException | Defines a general exception a servlet can throw when it encounters difficulty.
UnavailableException | Defines an exception that a servlet or filter throws to indicate that it is permanently or temporarily unavailable.

## Package javax.servlet Description

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.

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