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A "Zero Configuration" Struts application or plugin uses no additional XML or properties files. Metadata is expressed through convention and annotation.

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The subpackage name makes the namespace, and the action class name makes the action name. If there is an "Action" suffix, it is dropped before creating the action name. Therefore, if the configured package is com.myapp.actions and the Action is com.myapp.actions.member.EditAction, you can access it via http://server/myapp/member/edit.action^{Image Removed}. For multi-word actions, the first letter is lower-cased and the rest is left alone, so the Action MyCustomAction will map to myCustom.action.

Results

Results are defined with the Result and Results annotations at the class level.

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The ParentPackage Annotation has configures the XWork package (an XWork package is created per Java package) to extend the defined package. Multiple packages one or more defined packages. The best place for this annotation is on the package via the package-info.java file, however, for backward-compatibility, they can be specified through annotations on multiple one or more Actions in the package. To determine which parent packages should be set, first, it looks for the package annotation, then adds the action annotations as they are loaded. Because the load order of Actions is undetermined, it is highly recommended you avoid putting the @ParentPackage annotation on Action classes themselves.

For example, if you wanted to set the parent package for the com.mycompany.myapp.actions package, create this package-info.java file:

@ParentPackage("my-parent-package")
package com.mycompany.myapp.actions

import org.apache.struts2.config.ParentPackage;

To define multiple parent packages, list an array of package names:

@ParentPackage({"my-parent-package1, my-parent-package2"})
package com.mycompany.myapp.actions

import org.apache.struts2.config.ParentPackage;

Feedback

Stay tuned to this page for additional details and documentation. If you have a chance to try the zero configuration feature, please share any experiences on dev@ and here.

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