#httpservletrequest

Servlets: Atributos de petición, sesión, aplicación y cookies

Durante la programación de una aplicación web nos encontramos que tenemos necesidad de conservar el valor de las variables. En una aplicación de escritorio, podemos controlar cuando queremos borrar una variable, por lo que no aparece ese problema, pero en una aplicación web, el tema es bastante mas delicado. Recordemos que el protocolo http no esta orientado a sesion, eso hace que en cada conexion

Servlet Filter and Servlet Chain

Servlet Filter and Servelt Chain -We have looked at servlets that take requests directly from the server and return their results directly to the client. Servlets were designed as a generic server extension technology, however, rather than one devoted solely to performing CGIlike functions.

Most web servers that implement servlets have also implemented a feature called servlet chaining, where the…

ServletRequest: The common scenario when servlet is asked to handle request (ServletRequest), it typically needs specific information about the request so that it can process the request appropriately. Most frequently, the servlet will retrieve the value of a form variable and use that value in its output.

The servletmay also need access to information about the environment in which it is…