By Srikanth Shenoy

Struts is the most well-liked MVC framework used for J2EE internet program improvement. This booklet covers the Struts structure and fundamentals reminiscent of information validation, tags and I18N.

In addition, it covers loads of suggestions, suggestions and most sensible practices for Struts dependent program layout and improvement, lots of them no longer discovered in other places. It tells you the way to fill the gaps in Struts and what positive factors are vital in J2EE initiatives.

The ebook presents a strong exception dealing with procedure that's production-ready. you'll the right way to edit record dependent kinds in Struts. additionally, you will see the way to use Paging framework with Struts and neat methods. you'll discover whilst does customizing Struts quite make experience in genuine tasks.

What's inside of Struts fundamentals - structure, validation, tags, I18N most sensible Practices for designing motion periods motion chaining strong exception dealing with with Struts utilizing photo buttons in kinds record types Paging libraries for Struts dealing with reproduction shape submission in wide-spread approach Customizing Struts

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Extra info for Struts Survival Guide: Basics to Best Practices

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If so, it abandons the validation and proceeds further. And that’s why is different from . : This tag displays the errors from the ActionForm validation method. You already looked at its working in the last chapter. Struts Survival Guide – Basics to Best Practices 58 In the generated html, you might notice that the tag did not translate into any meaningful HTML. When the form is displayed for the first time, the validate() method in CustomerForm hasn’t been executed yet and hence there are no errors.

The next section in the config file is the controller. The controller is optional. RequestProcessor. There are cases when you want to replace or extend this to have your own specialized processor. For instance, when using Tiles (a JSP page template framework) in conjunction with Struts, you would use TilesRequestProcessor. The last section of immediate interest is the Message Resource definition. In the ActionErrors discussion, you saw a code snippet that used a cryptic key as the argument for the ActionError.

However it has to know the fully qualified class name of the ActionForm to do so. This is where the name attribute of ActionMapping comes in handy. The name attribute is the logical Chapter 2. Struts Framework Components 35 name of the ActionForm. CustomerForm. Step 3: The RequestProcessor instantiates the CustomerForm and puts it in appropriate scope – either session or request. The RequestProcessor determines the appropriate scope by looking at the scope attribute in the same ActionMapping. Step 4: Next, RequestProcessor iterates through the HTTP request parameters and populates the CustomerForm properties of the same name as the HTTP request parameters using Java Introspection.

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