Java Enterprise in a Nutshell, Second Edition

Name

Package javax.servlet

Synopsis

The javax.servlet package is the core of the Servlet API. It contains the classes necessary for a standard, protocol-independent servlet or filter. In addition, it provides a helper class, GenericServlet, to make it easier to implement the Servlet interface. As of version 2.3 of the Servlet API, this package also includes the interfaces and classes to support filters for request pre- and post-processing.

In Servlet 2.2, the concept of a Web Application was formalized. Hence, the javax.servlet package also includes classes to allow servlets to interact with their parent application via the ServletContext object. Version 2.3 added an event listener to web applications, allowing developers to register classes that participate in the web application’s lifecycle.

Interfaces

• Filter

• FilterChain

• FilterConfig

• RequestDispatcher

• Servlet

• ServletConfig

• ServletContext

• ServletRequest

• ServletResponse

• SingleThreadModel

Events

• ServletContextEvent

  • ServletContextAttributeEvent

Event Listeners

• ServletContextAttributeListener

• ServletContextListener

Other Classes

• GenericServlet , ServletConfig, Serializable;

• ServletInputStream

• ServletOutputStream

• ServletRequestWrapper

• ServletResponseWrapper

Exceptions

• ServletException

  • UnavailableException