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Struts2

 
6 Improved results - Unlike ActionForwards, Struts 2 Results provides flexibility to create multiple type of outputs and in actual it helps to prepare the response.

7 Better Tag features - Struts 2 tags enables to add style sheet-driven markup capabilities, so that we can create consistent pages with less code. Struts 2 tags are more capable and result oriented. Struts 2-tag markup can be altered by changing an underlying stylesheet. Individual tag markup can be changed by editing a FreeMarker template. Both JSP and FreeMarker tags are fully supported.

8 Annotations introduced: Applications in struts 2 can use use Java 5 annotations as an alternative to XML and Java properties configuration. Annotations minimize the use of xml.

9 Stateful Checkboxes - Struts 2 checkboxes do not require special handling for false values.

10 QuickStart - Many changes can be made on the fly without restarting a web container.

11 Customizing controller - Struts 1 lets to customize the request processor per module, Struts 2 lets to customize the request handling per action, if desired.

12 Easy Spring integration - Struts 2 Actions are Spring-aware. Just needs to add Spring beans.

13 Easy plugins - Struts 2 extensions can be added by dropping in a JAR. No manual configuration required.

14 AJAX support - The AJAX theme gives interactive applications a significant boost.

The framework provides a set of tags to help you ajaxify your applications, even on Dojo.


  The AJAX features include:
AJAX Client Side Validation
Remote form submission support (works with the submit tag as well)
An advanced div template that provides dynamic reloading of partial HTML
An advanced a template that provides the ability to load and evaluate JavaScript remotely
An AJAX-only tabbed Panel implementation
A rich pub-sub event model
Interactive auto complete tag
Request Lifecycle in Struts 2 applications 

Request for a resource by the user is processed in the sequence given below:

1 User Sends request: User sends a request to the server for some resource.

2 FilterDispatcher determines the appropriate action: The FilterDispatcher looks at the request and then determines the appropriate Action.

3 Interceptors are applied: Interceptors configured for applying the common functionalities such as workflow, validation, file upload etc. are automatically applied to the request.

4 Execution of Action: Then the action method is executed to perform the database related operations like storing or retrieving the data from database. 

5 Output rendering: Then the Result renders the output.

6 Return of Request: Then the request returns through the interceptors in the reverse order. The returning request allows us to perform the clean-up or additional processing.

7 Display the result to user: Finally the control is returned to the servlet container, which sends the output to the
user browser.
Nov 2007 | Java Jazz Up |30
 
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