Struts 2 Overview

✔ 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 framework:

Struts is an elegant, extensible, open source framework for developing java web application. It is used to develop Model-View-Controller (MVC) architecture based web applications.

Struts 2 was originally known as webwork 2. Later on webwork and struts combined to produce a new version of struts i.e. struts 2 framework is the combination of webwork and struts.

Struts 2 = webwork + struts 1.

Struts 2 features.

1. POJO forms:

No need of Action forms in Struts 2. Any POJO class can be used to receive the form input.

2. POJO Actions:

No need of Action class in Struts 2. Any POJO class can be used as Action class.

3. Enhanced Tag Support:

Struts 2 provide no. of various tags to ease the development process.

4. Template Support:

Struts 2 provide the template support for generating common look views.

5. Easy Integration support:

Struts 2 applications can be easily integrate with other frameworks like spring, hibernate etc.

6. AJAX support:

Struts 2 provides the ajax support with ajax tags.

7. Enhanced Results support:

More special results can be get by using JasperReports, JFreeChart etc.

Difference between struts 1 and struts 2.

Struts 1

Struts 2

1. Struts 1 Action classes must extends an abstract base class. 2. Struts 1 Actions are thread safe because they are singletons. 3. Struts 1 Actions are depends on the servlet API because the HttpServletRequest and HttpServletResponse have to be passed in the execute method. 4. Struts 1 use the ActionForm’s object to receive the form input. 5. Struts 1 use the JSTL expression language. 6. Struts 1 uses the standard JSP mechanism for binding objects into the page context. 7. Struts 1 provides less flexible type conversion. 8. Struts 1 uses manual validation by validate method on the ActionForm.

1. Struts 2 Action classes not have to extends any abstract class. They mayimplement an Action interface. 2. Struts 2 Actions are not thread safe. 3. Struts 2 Actions are not depend on the servlet API. 4. Struts 2 eliminate the need of ActionForm. 5. Struts 2 use the “Object Graph Notation Language” (OGNL) expression language. 6. Struts 2 uses the ValueStack technology for binding values into views. 7. Struts 2 provides more flexible type conversion. 8. Struts 2 allows manual validation by using the validate method. It also the XWork Validation framework.