Apache Struts 2 Web Application Development by Dave Newton

By Dave Newton

This e-book takes a transparent process, targeting one subject in keeping with bankruptcy, yet interspersing different matters within the mainline textual content and in bankruptcy detours. Taking a pragmatic strategy, it discusses agile net improvement utilizing Struts 2, with lots of examples for larger knowing. This booklet is for Java builders who're attracted to constructing internet purposes utilizing Struts. if you would like a accomplished advent to Struts 2.1, besides crucial points of extra internet program improvement applied sciences, agile programming practices, instrument production, and alertness lifestyles cycle administration this publication is for you. you don't want to grasp JavaScript and CSS to exploit this booklet because the writer will train you the mandatory fundamentals. while you are a Struts 1 or WebWork consumer and need to head forward and migrate to Struts 2, this sensible advisor is usually for you

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The Convention Plug-in has its own library dependencies. Maven makes this trivial. Without Maven, it's easiest to grab the libraries from the REST Plug-in showcase application. In this example, we won't use a Struts 2 configuration file. xml file. devMode to true. devMode true The Convention Plug-in and action-less actions When we make a request for which there is no mapping and no action, the Convention Plug-in will attempt to locate a reasonable result.

Using the Struts 2 custom tags and OGNL gives us another advantage. We can access action methods, including those that take parameters, directly from our JSP. This is in contrast to JSP EL, which allows access only to properties (although access to functions may appear in JEE 6). Right now, we just want to display localized messages on our JSP page. As mentioned earlier, we can call action methods from our JSP using Struts 2 tags and OGNL. One of the custom tags is , which is the most basic way to access action properties (and methods).

For example, we might configure our shopping list package in its own file and include it after our other packages were defined as seen here. -- ... existing config file ... xml file is placed in our shopping package and referred to by a classpath-relative path, like any other classpath resource. We can put the configuration files wherever we want—we could just as easily keep it at the root level. This is a simple way to break up areas of responsibility, delineate application functionality, reduce potential edit conflicts, and keep configuration as local to the implementation as possible.

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