Struts 2 Configuration Files

✔ STRUTS 2 CHAPTERS:-

1. Struts2 Overview
2. Struts2 Architecture
3. Struts2 Configuration Files
4. Action in Struts2
5. Action in Struts2 by using Pojo Class
6. Action in struts2 by Implementing Action Interface
7. Action in Struts2 by Extending Action Support Class
8. Struts2 Hello World Example
9. Multiple Configuration File in Struts2
10. OGNL in Struts2
11. Value Stack in Struts2
12. Interceptors in Struts2
13. Struts2 Execandwait Interceptor
14. Struts2 Custom Interceptor
15. Struts2 Result type
16. Struts2 Redirect result type
17. Struts2 Validation Framework
18. Struts2 Validation by Built in validators
19. Struts2 i18n
20. Struts2 Zero Configuration by convention approach
21. Struts2 Zero Configuration by annotation Approach
22. Dispatch Action Functionality in Struts2
23. Dynamic method invocation in Struts2
24. Struts2 UI Tags
25. Struts2 Control Tags
26. Struts2 Data Tags
27. Struts2 and tiles integration
28. Struts2 and Quartz2 Schedular
29. Struts2 Interview Questions and Answers

Struts.xml file:

The struts.xml is the core configuration file for struts framework. The struts.xml is used to initialize the resources like Interceptors, Action classes and Results.

Syntax:

<struts>
 
   <package name="packageName" extends="struts-default">
 
      <action name="actionName" class="actionClass" method="methodName">
            <result name="success">/HelloWorld.jsp</result>
      </action>
 
      //more actions.
 
   </package>
 
   //more packages.
 
</struts>

Commonly used attributes:

1. package attribute: It is used for modularization. You can divide configuration into multiple modules.

2. action attribute: It is a sub-attribute of the package attribute. It represents an action.

3. result attribute: It is a sub-attribute of the action attribute. It is used to control the flow after an action is executed.

web.xml:

The web.xml is known as deployment descriptor. It is used for providing entry point in any web application. In struts 2 we have to define FilterDispatcher class entry in web.xml.

web.xml file example:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
 xmlns="http://java.sun.com/xml/ns/javaee" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 
 
<filter>
 <filter-name>struts2</filter-name>
 <filter-class>
  org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
 </filter-class>
</filter>
 
<filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>
 
<welcome-file-list>
  <welcome-file>login.jsp</welcome-file>
</welcome-file-list>
 
</web-app>

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