Ajax using XMLHttpRequest and Struts. Frank W. Zammetti About five years ago I worked on a web app project where one of the primary requirements was that it should look, work and feel like a Windows-based fat client. Now, ignoring the question of why it was not in fact done as a Windows-based fat client in the first place, that can be a rather tough requirement in the world of web development, certainly it was five years ago when not very many examples of such a thing existed. As a result of a number of proof-of-concepts, I stumbled upon some techniques for doing things that were at the time rather atypical approaches to web development.
The end result was an application that, to this day, many people cannot even tell is web-based, aside from the fact that you access it with a browser! Little did I know that only a few years later the basic concepts behind what I had done would re-emerge in the world as something called . is a term coined by the folks at Adaptive Path and is shorthand for Asynchronous Javascript + XML. try { Overview (Struts 1.3.10 API) Comparing the Struts 1 and Struts 2 Web Application Frameworks. Because the Struts web application framework was initially released at the beginning of this decade, developers have utilized it to construct many thousands of applications. Struts was, and still is, the most popular framework for building Java-based web applications. Though not without its flaws, Struts simplifies the construction of robust and maintainable web-based software. Today, there are probably twice as many applications using Struts than there are those using all other competing web frameworks combined.
It is a tribute to Struts that so many succeeding frameworks, such as JSF (JavaServer Faces), borrowed many of their concepts directly from Struts. Struts is far from perfect, however, and in recent years developers have increasingly begun to turn to alternative solutions. Background Struts was first released in 2001. Struts 1 Walkthrough To begin a Struts 1 application, the first file you need is the web.xml configuration file.
Struts-config.xml Page 1 of 6. Tiles Tag Library. This tag library provides tiles tags. Tiles were previously called Components. For historical reasons, names, pages, components and templates are used indifferently to design a tile. Also, a lot of tags and attribute names are left for backward compatibility. To know more about tags defined in this library, check the associated documentation: tiles-doc. insert - Insert a tiles/component/template. Insert a tiles/component/template with the possibility to pass parameters (called attribute). A tile can be seen as a procedure that can take parameters or attributes. You must specify one of this tag attribute : template, for inserting a tiles/component/template page, component, for inserting a tiles/component/template page, (same as template) page for inserting a JSP page, (same as template) definition, for inserting a definition from definitions factory attribute, surrounding tiles's attribute name whose value is used.
Example : Back to top Create a tile/component/template definition as a bean. Overview (Struts 2 Core 2.0.9 API) Introduction to Struts Architecture. This tutorial looks closely at the Struts terminology for controller servlet and Handler objects that we mentioned and understand Figure below. Since this is your first look at Struts, we will not get into every detail of the HTTP request handling lifecycle in Struts framework. For now, let us concentrate on the basics. In Struts, there is only one controller servlet for the entire web application. This controller servlet is called ActionServlet and resides in the package org.apache.struts.action.
It intercepts every client request and populates an ActionForm from the HTTP request parameters. ActionForm is a normal JavaBeans class. It has several attributes corresponding to the HTTP request parameters and getter, setter methods for those attributes. // Sample ActionForm public class MyForm extends ActionForm { private String firstName; private String lastName; public MyForm() { firstName = “”; lastName = “”; public String getFirstName() { return firstName; Struts architecture.
Tutorial on Struts Configuration File - struts-config.xml in Struts - from the book: Struts Survival Guide. Basics to Best Practices. By: Authors: Shenoy S. Mallya N. Emailed: 618 times Printed: 2066 times The configurable controller is the answer to the Fat controller problem. In a Fat Controller, the programmers can code “if” blocks on need basis.
Not so with the configurable controllers. The expressive and configuration capability is limited to what the built-in controller can support. The Struts configuration file adheres to the struts-config_1_1.dtd. The five important sections are: 1. Listing below shows a sample Struts Config file showing all the five sections. Table: Important attributes and elements of ActionMapping entry in struts-config.xml The ActionMapping section contains the mapping from URL path to an Action class (and also associates a Form bean with the path). //Sample struts-config.xml <? In the ActionMapping there are two forwards. Or it can be another ActionMapping as in The /logoff (notice the absence of “.do”) would be another ActionMapping in the struts-config.xml.
Server-side Java: Understanding JavaServer Pages Model 2 architecture. Despite its relatively recent introduction, JavaServer Pages (JSP) technology is well on its way to becoming the preeminent Java technology for building applications that serve dynamic Web content. Java developers love JSP for myriad reasons. Some like the fact that it brings the "write once, run anywhere" paradigm to interactive Web pages; others appreciate the fact that it is fairly simple to learn and lets them wield Java as a server-side scripting language. But most concur on one thing -- the biggest advantage of using JSP is that it helps effectively separate presentation from content.
In this article, I provide an in-depth look at how you can gain optimal separation of presentation from content by using the JSP Model 2 architecture. This model can also be seen as a server-side implementation of the popular Model-View-Controller (MVC) design pattern. So, what's wrong with servlets? HtmlKona to the mix. Differing philosophies Understanding Music Without Borders The main view, EShop.jsp. The Apache Struts Web Application Framework. Welcome to Struts!
The goal of this project is to provide an open source framework for building Java web applications. The core of the Struts framework is a flexible control layer based on standard technologies like Java Servlets, JavaBeans, ResourceBundles, and XML, as well as various Jakarta Commons packages. Struts encourages application architectures based on the Model 2 approach, a variation of the classic Model-View-Controller (MVC) design paradigm.
Struts provides its own Controller component and integrates with other technologies to provide the Model and the View. For the Model, Struts can interact with standard data access technologies, like JDBC and EJB, as well as most any third-party packages, like Hibernate, iBATIS, or Object Relational Bridge. For the View, Struts works well with JavaServer Pages, including JSTL and JSF, as well as Velocity Templates, XSLT, and other presentation systems. Struts is a project of the The Apache Software Foundation. No.