What is ActionServlet in Struts?
ActionServlet represents the “controller” in the Model-View-Controller (MVC) design pattern for web applications that is commonly known as “Model 2”. There will be one instance of this servlet class, which receives and processes all requests that change the state of a user’s interaction with the application.
How will you configure a servlet of class ActionServlet?
How to configure Struts framework in web. xml
- – Define Struts action servlet and its initialization parameters.
- – Specify servlet mapping for the action servlet.
- – Declaration of the filter dispatcher.
- – URL mapping for the filter dispatcher.
Which initialize parameter is used to specify Struts configuration?
Starting with Struts 1.1, you can specify a comma-separated list of configuration files for this paramter. Specify additional application modules by using the value config/ and the prefix of the module. In this example, the init-param name would be config/module1 , and the value might be WEB-INF/struts-sub1-config.
What is the use of Web xml file in struts?
The web. xml web application descriptor file represents the core of the Java web application, so it is appropriate that it is also part of the core of the Struts framework. In the web. xml file, Struts defines its FilterDispatcher, the Servlet Filter class that initializes the Struts framework and handles all requests.
What is action class and Actionform?
Action classes are defined to handle request. Actions exist between Model and view of an application. The struts-config.xml file designates the Action classes that handle requests for various URLs. The struts-config.xml file then decides which JSP page should apply to that situation.
How do you create an action class in struts?
Create Multiple Actions struts2; import com. opensymphony. xwork2. ActionSupport; class MyAction extends ActionSupport { public static String GOOD = SUCCESS; public static String BAD = ERROR; } public class HelloWorld extends ActionSupport { public String execute() { if (“SECRET”.
Which config files are used in struts?
Configuration Files
| File | Optional | Purpose |
|---|---|---|
| struts.xml | yes | Main configuration, contains result/view types, action mappings, interceptors, and so forth \ |
| default.properties | yes | Framework properties |
| struts-default.xml | yes | Default configuration provided by Struts |
| struts-default.vm | yes | Default macros referenced by velocity.properties |
What is struts xml?
The struts-config. xml configuration file is a link between the View and Model components in the Web Client. It plays an important role in building both Controller components and Application-specific configurations. In Web NMS, this file is created specific to every application in the format as -struts-config.
What is ActionForm?
An ActionForm is a JavaBean optionally associated with one or more ActionMappings. Such a Bean will have had its properties initialized from the corresponding request parameters before the corresponding action’s execute() method is called.
Which is the standard version of ActionServlet?
The standard version of ActionServlet is configured based on the following servlet initialization parameters, which you will specify in the web application deployment descriptor ( /WEB-INF/web.xml ) for your application. Subclasses that specialize this servlet are free to define additional initialization parameters.
What does ActionServlet stand for in Apache Struts?
ActionServlet provides the “controller” in the Model-View-Controller (MVC) design pattern for web applications that is commonly known as “Model 2”. This nomenclature originated with a description in the JavaServerPages Specification, version 0.92, and has persisted ever since (in the absence of a better name).
Which is Java class name for ActionMapping implementation?
mapping – The Java class name of the ActionMapping implementation to use
What are the classes for Apache Struts action forwardingactionforward?
Two convenient classes you may wish to use are: org.apache.struts.action.ForwardingActionForward – Subclass of org.apache.struts.action.ActionForward that defaults the redirect property to false (same as the ActionForward default value).