By Dave Newton
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Extra info for Apache Struts 2 Web Application Development
While the mantra of "actions are POJOs" echoes in our heads, extending the ActionSupport class provides us with quite a bit of functionality, including internationalization (I18N), validation, and so on. Much of this functionality is provided by a combination of interface implementations and interceptors. We'll cover ActionSupport, a utility class implementing most of the commonly used interfaces, as well as a few other handy interfaces. We'll see how we can get a lot out of the framework, without covering how some of the functionality is actually implemented.
If we later modified the action to use an action class, the URL wouldn't need to be changed. Choosing an action method Our very simple action had a single method, execute(), which will be called by default. jsp Some people prefer creating separate classes for every action, rather than filling an action with several methods. Which route to take can depend on several factors, including personal preference. In some cases it makes perfect sense to keep related functionality in a single class, in other cases it may not.
The sample applications are available in both a Maven-based distribution and a typical non-Maven directory layout. When we refer to source code, it will almost always be obvious where the directories and files belong (if you're not very familiar with Maven and wish to do things the "Maven way", there's an introduction to the Maven directory layout on the Maven website). The book text assumes that we're already able to get a Java web application compiled and deployed. This material is copyright and is licensed for the sole use by Paul Corcorran on 5th July 2009 8601 ave.
Apache Struts 2 Web Application Development by Dave Newton