Industries use frameworks for application development quite often. For example: Java concepts like JSP, Servlet, Swing, Bean, JDBC can be used directly to create web-applications but when such applications become big, it becomes difficult to maintain and develop them further. Hence, frameworks like struts are used to develop large web-based Java applications. This makes maintenance and further development easier. If you need to write a very simple web application with a few pages, then you might consider using JSP/Servlet directly otherwise Struts like frameworks are better options.Struts-1 uses the concept Model View Architecture (MVC) and provides the controller. In MVC model, Model represents business logic, View represents user interfaces, and Controller represents/controls control flow of the application. Struts' control layer is based on standard technologies like Java Servlets, JavaBeans, ResourceBundles, and XML, as well as various Apache Commons packages, like BeanUtils and Chain of Responsibility. For the Model, struts-1 framework 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, the framework works well with JavaServer Pages, including JSTL and JSF, as well as Velocity Templates, XSLT, and other presentation systems.The framework's Controller acts as a bridge between the application's Model and the web View. When a request is received, the Controller invokes an Action class. The Action class consults with the Model to examine or update the application's state. The framework provides an ActionForm class to help transfer data between Model and View.Struts-1 Configuration-----------------------web.xml is one of the configuration files. It is an XML-formatted file that works as a deployment descriptor. struts-config.xml is another resource file to initialize the applications resources. These resources include ActionForms to collect input from users, ActionMappings to direct input to server-side Actions, and ActionForwards to select output pages.Sample struts-config.xml file. Other resources like Validators can be initialized here.
From: http://sitestree.com/?p=4787
Categories:Java Short Notes
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Post Data:2010-03-13 02:59:40
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