Programming Tutorials

By: Grenfel : 2023年05月04日

Description: DispatchAction is another useful built-in Struts Action. However you cannot use it as is. You will have to extend it to provide your own implementation. An example will make things clear. Consider an online credit card application. Customers fill the credit card application online. The bank personnel get a List screen as shown in Figure below and they can act in one of four ways - Approve, Reject or Add Comment. Consequently there are three images each being a .

By: Ivan Lim : 2023年05月04日

Description: Duplicate form submissions are acceptable in some cases. Such scenarios are called idempotent transitions. When multiple submissions of data are not critical enough to impact the behavior of the application, duplicate form submissions do not pose a threat.

By: Jagan : 2023年05月01日

Description: Struts application development in enterprise applications requires discipline. We are not referring to any particular methodology; just some guidelines for Struts based application development for enterprise applications. In this section a stepby-step approach for Struts application development cycle is provided.

By: Barbara : 2008年12月10日

Description: You can define any number of JDBC javax.sql.DataSource objects for the application in the configuration file under the element . Every data source is defined within the element using the element. The element defines a number of attributes, the most important of which are listed in Table below.

By: Barbara : 2008年12月09日

Description: As you'd expect in an MVC framework, every request starts at the Struts controller, the heart of which is the ActionServlet class. This servlet is usually mapped to the extension *.do. For example, a request for /process.do would end up with the ActionServlet and tell it that the user has submitted a pizza order:

By: Apache Foundation : 2008年09月20日

Description: This is an excellent question. Let's step back a second and think about a typical mid to large size application. If we start from the back end and work toward the view we have:

By: Apache Foundation : 2008年09月20日

Description: Chaining actions can be done by simply using the proper mapping in your forward entries in the struts-config.xml file. Assume you had the following two classes:

By: Apache Foundation : 2008年09月20日

Description: First off, there's an even newer Validator rule called validwhen, which is almost certainly what you want to use, since it is much easier and more powerful. It will be available in the first release after 1.1 ships. The example shown below could be coded with validwhen as:

By: Apache Foundation : 2008年09月20日

Description: The simplest way to prepopulate a form is to have an Action whose sole purpose is to populate an ActionForm and forward to the servlet or JSP to render that form back to the client. A separate Action would then be use to process the submitted form fields, by declaring an instance of the same form bean name.

By: Apache Foundation : 2008年09月20日

Description: This is just one of many ways to achieve submitting a form and decoding the intended action. Once you get used to the framework you will find other ways that make more sense for your coding style and requirements. Just remember this example is completely non-functional without JavaScript.