What is an “Action Class”?

Struts Questions and Answers

(Continued from previous question...)

82. What is an “Action Class”?

The “Action Class” is part of the “Model” and is a wrapper around the business logic.
The purpose of the “Action Class” is to translate the HttpServletRequest to the business logic.
To use the “Action”, we need to subclass and overwrite the execute() method.
All the database and business processing is done in the “Action” class.
It is advisable to perform all the database related work in the “Action” class.
The ActionServlet (command) passes the parameterized class to ActionForm using the execute() method.
The return type of the execute method is ActionForward which is used by the Struts Framework to forward the request to the file according to the value of the returned ActionForward object.

(Continued on next question...)

Other Interview Questions

• What is Struts?
• How is the MVC design pattern used in Struts framework?
• Who makes the Struts?
• Why it called Struts?
• Do we need to pay the Struts if being used in commercial purpose?
• What are the core classes of Struts?
• What is the design role played by Struts?
• How Struts control data flow?
• What configuration files are used in Struts?
• What helpers in the form of JSP pages are provided in Struts framework?
• Is Struts efficient?
• How you will enable front-end validation based on the xml in validation.xml?
• What is ActionServlet?
• How you will make available any Message Resources Definitions file to the Struts Framework Environment?
• What is Action Class?
• Write code of any Action Class?
• What is ActionForm?
• What is Struts Validator Framework?
• Give the Details of XML files used in Validator Framework?
• How you will display validation fail errors on jsp page?
• Why do we need Struts?
• How does Struts work?
• Is Struts compatible with other Java technologies?
• Who wrote Struts?
• Why is it called Struts?
• Do I have to credit Struts on my own website?
• Where can I get a copy of Struts?
• How do I install Struts?
• When do I need "struts.jar" on my classpath?
• Does Struts include its own unit tests?
• If the framework doesn't do what I want, can I request that a feature be added?
• Where can I get help with Struts?
• What's the difference between Struts and Turbine? What's the difference between Struts and Expresso?
• Why aren't the Struts tags maintained as part of the Jakarta Taglibs project?
• Are the Struts tags XHTML compliant?
• Will the Struts tags support other markup languages such as WML
• What about JSTL and JavaServer Faces?
• Is there a particularly good IDE to use with Struts
• Why was reload removed from Struts (since 1.1)?
• What is a modular application? What does module-relative mean?
• Why are some of the class and element names counter-intuitive?
• Why is ActionForm a base class rather than an interface?
• Do ActionForms have to be true JavaBeans?
• Can I use multiple HTML form elements with the same name?
• Can I use multiple HTML form elements with the same name?
• Why doesn't the focus feature on the <html:form> tag work in every circumstance?
• Why are my checkboxes not being set from ON to OFF?
• Can I use JavaScript to submit a form?
• How do I use JavaScript to ...
• Can't I just create some of my JavaBeans in the JSP using a scriptlet?
• Can I use other beans or hashmaps with ActionForms?
• Why do the Struts tags provide for so little formatting?
• Why does the <html:link> tag URL-encode javascript and mailto links?
• How can I scroll through list of pages like the search results in google?
• Why does the option tag render selected=selected instead of just selected?
• Do I have to use JSPs with my application?
• Do ActionForms have to be true JavaBeans?
• Do I have to have a separate ActionForm bean for every HTML form?
• How can I prepopulate a form?
• Can I have an Action without a form?
• Can you give me a simple example of using the requiredif Validator rule?
• When is the best time to validate input?
• How can I avoid validating a form before data is entered?
• How can I create a wizard workflow?
• How can I 'chain' Actions?
• Struts GenericDataSource Just a general question
• Dynamic pages using struts Is it possible to create the elements of a page(jsp) dynamically based on the results of a data base query, when using struts framework?
• What's the best way to deal with migrating a large application from Struts to JSF? Is there any tool support that can help?
• Declarative Exception Handling
• Can you compare the advantages and disadvantages of JSF vs. Struts ?
• Both JSF and Struts will continue to exist for a while ?
• Multiple Sub-applications
• DynaBean and BeanUtils
• Validator
• Default Sub-application
• Direct Requests to JSPs
• ActionServlet Configurations
• Action.execute() and Action.getResources()
• Library Dependency
• Resources under WEB-INF
• What is the Jakarta Struts Framework?
• What is an ActionServlet?
• How can one make any “Message Resources” definitions file available to the “Struts Framework” environment?
• What is an “Action Class”?
• Write code of any Action Class?
• What is an “ActionForm”?
• What is Struts Validator Framework?
• Describe the details of XML files used in the “Validator Framework”?
• How would you display “validation fail” errors on a JSP page?
• How can one enable front-end validation based on the xml in validation.xml?