What is ActionInvocation in Struts2?
An ActionInvocation represents the execution state of an Action . It holds the Interceptors and the Action instance. By repeated re-entrant execution of the invoke() method, initially by the ActionProxy , then by the Interceptors, the Interceptors are all executed, and then the Action and the Result .
What types of validators are available in xml based validation in Struts2 *?
Struts2 XML based validation provides more options of validation like email validation, integer range validation, form validation field, expression validation, regex validation, required validation, requiredstring validation, stringlength validation and etc.
What is struts What is the difference between Struts 1 and Struts2?
Struts 1 Actions have dependencies on the servlet API since the HttpServletRequest and HttpServletResponse is passed to the execute method when an Action is invoked. Struts 2 Actions are not coupled to a container.
What is the purpose of struts xml in struct2?
The struts. xml file contains the configuration information that you will be modifying as actions are developed. This file can be used to override default settings for an application, for example struts. devMode = false and other settings which are defined in property file.
Which interceptor is responsible for file upload support?
Which interceptor is responsible for file upload support? File uploading in Struts is possible through a pre-defined interceptor called FileUpload interceptor which is available through the org. apache.
What are features of struts?
The important features of struts 2 framework are as follows:
- Configurable MVC components.
- POJO based actions.
- AJAX support.
- Integration support.
- Various Result Types.
- Various Tag support.
- Theme and Template support.
What is OGNL used for?
Object-Graph Navigation Language (OGNL) is an open-source Expression Language (EL) for Java, which, while using simpler expressions than the full range of those supported by the Java language, allows getting and setting properties (through defined setProperty and getProperty methods, found in JavaBeans), and execution …
What is ActionContext in struts2?
The ActionContext is the context in which an Action is executed. Each context is basically a container of objects an action needs for execution like the session, parameters, locale, etc. The ActionContext is thread local which means that values stored in the ActionContext are unique per thread.