JavaServer Pages, Second Edition

Name

application

Synopsis

The application variable contains a reference to a ServletContext instance. The ServletContext provides resources shared within a web application. It holds attribute values representing the JSP application scope. An attribute value can be an instance of any valid Java class. It also defines a set of methods that a JSP page or a servlet use to communicate with its container, for example, to get the MIME type of a file, dispatch requests, or write to a log file. The web container is responsible for providing an implementation of the ServletContext interface.

A ServletContext is assigned a specific URI path prefix within a web server. For example a context can be responsible for all resources under http://www.mycorp.com/catalog. All requests that start with the /catalog request path, which is known as the context path, are routed to this servlet context.

A single instance of a ServletContext is available to all servlets and JSP pages in a web application, unless the web application indicates that it’s distributable. For a distributed application, there’s a single instance of the ServletContext class per application per Java Virtual Machine (JVM).

Synopsis

Variable name:	application
EL expression	${pageContext.servletContext}
Interface name:	javax.servlet.ServletContext
Extends:	None
Implemented by:	Internal container-dependent class
JSP page type:	Available in both regular JSP pages and error pages

Methods

public Object getAttribute(String ...