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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.

Interface Summary

Modifier and TypeInterface and Description
public interface
AsyncContext

Class representing the execution context for an asynchronous operation that was initiated on a ServletRequest.

public interface
AsyncListener

Listener that will be notified in the event that an asynchronous operation initiated on a ServletRequest to which the listener had been added has completed, timed out, or resulted in an error.

public interface
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.

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.

public interface
FilterConfig

A filter configuration object used by a servlet container to pass information to a filter during initialization.

public interface
FilterRegistration

Interface through which a Filter may be further configured.

public interface
ReadListener

This class represents a call-back mechanism that will notify implementations as HTTP request data becomes available to be read without blocking.

public interface
Registration

Interface through which a Servlet or Filter may be further configured.

public interface
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.

public interface
Servlet

Defines methods that all servlets must implement.

public interface
ServletConfig

A servlet configuration object used by a servlet container to pass information to a servlet during initialization.

public interface
ServletContainerInitializer

Interface which allows a library/runtime to be notified of a web application's startup phase and perform any required programmatic registration of servlets, filters, and listeners in response to it.

public interface
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.

public interface
ServletContextAttributeListener

Interface for receiving notification events about ServletContext attribute changes.

public interface
ServletContextListener

Interface for receiving notification events about ServletContext lifecycle changes.

public interface
ServletRegistration

Interface through which a Servlet may be further configured.

public interface
ServletRequest

Defines an object to provide client request information to a servlet.

public interface
ServletRequestAttributeListener

Interface for receiving notification events about ServletRequest attribute changes.

public interface
ServletRequestListener

Interface for receiving notification events about requests coming into and going out of scope of a web application.

public interface
ServletResponse

Defines an object to assist a servlet in sending a response to the client.

public interface
SessionCookieConfig

Class that may be used to configure various properties of cookies used for session tracking purposes.

public interface
SingleThreadModel

Deprecated As of Java Servlet API 2.4, with no direct replacement.
Ensures that servlets handle only one request at a time.
public interface
WriteListener

Callback notification mechanism that signals to the developer it's possible to write content without blocking.

Class Summary

Modifier and TypeClass and Description
public class
AsyncEvent

Event that gets fired when the asynchronous operation initiated on a ServletRequest (via a call to ServletRequest#startAsync or ServletRequest#startAsync(ServletRequest, ServletResponse)) has completed, timed out, or produced an error.

public abstract class
GenericFilter

Defines a generic, protocol-independent filter.

public abstract class
GenericServlet

Defines a generic, protocol-independent servlet.

public class
HttpConstraintElement

Java Class representation of an HttpConstraint annotation value.

public class
HttpMethodConstraintElement

Java Class represntation of an HttpMethodConstraint annotation value.

public class
MultipartConfigElement

Java Class represntation of an MultipartConfig annotation value.

public class
ServletContextAttributeEvent

Event class for notifications about changes to the attributes of the ServletContext of a web application.

public class
ServletContextEvent

This is the event class for notifications about changes to the servlet context of a web application.

public class
ServletException

Defines a general exception a servlet can throw when it encounters difficulty.

public abstract class
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.

public abstract class
ServletOutputStream

Provides an output stream for sending binary data to the client.

public class
ServletRequestAttributeEvent

This is the event class for notifications of changes to the attributes of the servlet request in an application.

public class
ServletRequestEvent

Events of this kind indicate lifecycle events for a ServletRequest.

public class
ServletRequestWrapper

Provides a convenient implementation of the ServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet.

public class
ServletResponseWrapper

Provides a convenient implementation of the ServletResponse interface that can be subclassed by developers wishing to adapt the response from a Servlet.

public class
ServletSecurityElement

Java Class representation of a ServletSecurity annotation value.

public class
UnavailableException

Defines an exception that a servlet or filter throws to indicate that it is permanently or temporarily unavailable.

Enum Summary

Modifier and TypeEnum and Description
public enum
DispatcherType

Enumeration of filter dispatcher types.

public enum
SessionTrackingMode

Enumeration of session tracking modes.