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**In Struts 2, actions act like a template. The main task of the controller is to decide which action class should be able to handle which request. And the controller basically does this using the configuration we define in Struts. xml or through the annotation process in the case of Struts 2.
struts2 org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter struts2 /* struts2 org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter ... /s /WEB-INF/struts-tags.tld struts2 org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter struts.fileManager com.company.MyFileManager struts2 org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter struts.fileManagerFactory
com.company.MyFileManagerFactory struts2 org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter configProviders com.company.MyConfigurationProvider Apache Struts, Struts, Apache, the Apache Feather Logo, and the Apache Struts Project are registered trademarks. trademarks of the Apache Software Foundation.
Can we use servlets in Struts 2?
Java requirements Struts 2 requires Servlet API 2.4 or later, JSP 2.0 or later, and Java 7 or later.
According to the Struts2 book Budi Karnival struts2, there is a distinct advantage to using the filter itself as a control rather than a servlet. With a filter, you can easily serve all of your application’s resources, including static resources. A
What is action servlet in Struts?
Answer: ActionServlet provides a “Controller” in the Model-View-Controller (MVC) web application design pattern, commonly referred to as “Model 2”. All these requests to the server go through the new controller. The controller is solely responsible for processing requests.
I would say that for servlets, this controller only manages access to the dynamic part of the application. Note that the url-pattern element in the web.xml directory is often
in the previous application.census.
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Controller ... Controller *.action With this setting, requests for stale resources are often handled by the container rather than the servlet controller. You may want to manage static resources in your own personal controller servlet, as this will require some extra work.
The filter is different. The display may send requests for inactive content. To route the request, call the filterChain.doFilter method on the filter of the exact doFilter method.
Therefore, using a filter as a specific controller blocks all requests to the application, including requests for audio content. You then have the following option when providing your handle:
How will you configure a servlet of class ActionServlet?
– Install the Struts action servlet and these are the initialization parameters.- Specify the servlet mapping for the policy servlet.- Declaration of the screen sender.- URL mapping for filter manager.
filterDispatcher ... filterDispatcher /* The advantage of this filter: One thing is certain, you can definitely protect your static files from prying eyes.
The following code will give the correct error message when the user tries to use the JavaScript file:
public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) contains IOException, ServletException Request HttpServletRequest = (HttpServletRequest) request;HttpServletResponse ers = (HttpServletResponse) response;The uri string means req.getRequestURI();if (uri.indexOf("/css/") != -1 && req.== getheader("referer") null) res.sendError(HttpServletResponse.SC_FORBIDDEN); different // Cover this request It won’t process your code by the most dedicated people, but users will no longer be able to type next to your static file’s URL to successfully view it. For the same reason, you and your family can protect your images so that no one can link them at their own expense.
Imagine interceptors in the struts2 framework. This not only reduces our coding effort, but also helps us write code where we could use code filters and need toChanges to be made in the web.xml file, unlike Struts1. route to interceptors (which are more manageable than filters), whose configuration can be controlled in the struts.xml directive without affecting the web.xml file
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