The minimum set of Struts2 libraries needed for our tutorial application is given below note that the version numbers may be different if you are using a different version of Struts2 ,. Add all the jars given in the above list from the downloaded Struts2 zip file. After adding all the jars the Libraries section of the NetBeans project should look like the following.
For this we will first configure a Struts2 class org. StrutsPrepareAndExecuteFilter as a servlet filter by modifying the web. If you don't have web. The above configuration in web. This will act as a single controller dispatching requests to Struts 2 request processors action classes based on the request properties. MVC stands for Model-View-Controller and it is a design paradigm which helps in building and maintaining large Web applications. The simplest definition is - A user request is handled by a controller which in turn gets data from model and forwards it to the view for display.
Let us modify the "Hello World! For a simple application like "Hello World! However for large enterprise Web applications such separation of concerns is very essential for the robustness, reliability, extensibility and maintainability of the application. Let us first create our model class which holds the "Hello World! In real applications, these model objects will correspond to persistent data.
In this simple example we will be directly using the model object from the controller. However in real applications, we will create a business layer which will return the data. Note that the Message class is organized under model java package.
Next we will create an action class controller which will respond to the user request. Typically action classes handling user requests extend from ActionSupport class.
The request processing will be done by the overridden execute method which is automatically called by the framework. Note that the HelloWorld. We will now create the user interface. In this demo example we will use the JSP technology for rendering the user interface.
Struts 2 supports other view technologies such as freemarker templates and velocity templates. Note the use of custom tags in the JSP. Tomcat will automatically deploy the application. Click the English link and familiarize yourself with Struts Blank sample application. Struts 2. You can simply copy these files to the webapps directory of your tomcat server. Tomcat will automatically deploy these applications and then you can test these applications. Then verify the signatures using.
Alternatively, you can verify the MD5 signature on the files. A Unix program called md5 or md5sum is included in many Unix distributions. It is also available as part of GNU Textutils. Windows users can get binary md5 programs from here, here, or here. Viewed times. When I was developing Struts2 application, I was getting Exception starting filter struts2 java.
Improve this question. Roman C Div Div 28 1 1 bronze badge. FilterDispatcher is old Struts 2. StrutsPrepareAndExecuteFilter is new. You cannot "change" one to another because "it doesn't work", you have to pickup the right version according to your Struts2 version.
Then download all the needed libraries, and put them in the right place. Then if you still have problems, update the question — Andrea Ligios. For better choice read the server documentation that enables you to manage the web applications deployed on the server. Add a comment.
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