What is the difference between RequestDispatcher's forward(ServletRequest request, ServletResponse response) method and HttpServletResponse's sendRedirect(String location) method? Byron Tymvios The forward method of RequestDispatcher will forward the ServletRequest and ServletResponse that it is passed to the path that was specified in getRequestDispatcher(String path). The response will not be sent back to the client and so the client will not know about this change of resource on the server.
This method is useful for communicating between server resources, (servlet to servlet). Because the request and response are forwarded to another resource all request parameters are maintained and available for use. Since the client does not know about this forward on the server, no history of it will be stored on the client, so using the back and forward buttons will not work. An example using forward: protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { RequestDispatcher rd = request.getRequestDispatcher("pathToResource"); rd.forward(request, response); }
JAVA - Cear un Servlet en Eclipse. Cear un Servlet y leer un parámetro de la URL haciendo uso de Eclipse A continuación veremos como crear un Servlet en un proyecto Web haciendo uso del IDE Eclipse. Pre-Requisitos: Instalar JDK.Instalar un Servidor Web de aplicaciones para Java como por ejemplo Apache Tomcat. Instalación de Eclipse.Creación de un proyecto Web con Eclipse (para mayor información ver el artículo JAVA - Cear una aplicación Web con Eclipse).Una vez que contamos con lo anterior, procedemos a abrir nuestro proyecto Web y damos clic con el botón secundario del mouse sobre él, seleccionamos la opción New y posteriormente clic en la opción Servlet. Ahora nos aparecerá la siguiente ventana, en la cual se nos solicita el nombre del Servlet que deseamos crear, así como el paquete en el cual estará contenido. Para nuestro ejemplo, el nombre del servlet es ServletPrueba y se encontrara en el paquete sanchez_soft.
A continuación damos clic en el botón Next. Bienvenido " + usuarioNombre + "!! Listo!! Reference. Servlets are the Java platform technology of choice for extending and enhancing Web servers. Servlets provide a component-based, platform-independent method for building Web-based applications, without the performance limitations of CGI programs. And unlike proprietary server extension mechanisms (such as the Netscape Server API or Apache modules), servlets are server- and platform-independent.
This leaves you free to select a "best of breed" strategy for your servers, platforms, and tools. Servlets have access to the entire family of Java APIs, including the JDBC API to access enterprise databases. Today servlets are a popular choice for building interactive Web applications. You might want to check out the latest information on JavaServer Pages (JSP) technology. Java Servlet Technology - Implementations & Specifications. Introducing the Java EE 6 Platform: Part 1. » View this article in PDF Articles Index Part 1 | Part 2 | Part 3 Java EE 6 Java Platform, Enterprise Edition (Java EE) is the industry-standard platform for building enterprise-class applications coded in the Java programming language.
Based on the solid foundation of Java Platform, Standard Edition (Java SE), Java EE adds libraries and system services that support the scalability, accessibility, security, integrity, and other requirements of enterprise-class applications. Since its initial release in 1999, Java EE has matured into a functionally rich, high performance platform. Recent releases of the platform have also stressed simplicity and ease of use. Progress continues. This article highlights some of the significant enhancements in Java EE 6. Contents Here are the main goals for the Java EE 6 platform: More Flexible Technology Stack. Powerful New Technologies Java EE 6 adds significant new technologies that make the platform even more powerful. Notice the @Produces annotation. Introducción a la Programación de Java Servlets.