Packages are a way to group actions, results, result types, interceptors, and interceptor-stacks into a logical configuration unit. Conceptually, packages are similiar to objects in that they can be extended and have individual parts that can be overridden by "sub" packages.
Packages
The package element has one required attribute, name, which acts as the key for later reference to the package. The extends attribute is optional and allows one package to inherit the configuration of one or more previous packages - including all interceptor, interceptor-stack, and action configurations.
Note that the configuration file is processed sequentially down the document, so the package referenced by an "extends" should be defined above the package which extends it.
The optional abstract attribute creates a base package that can omit the action configuration.
Attribute | Required | Description |
|---|---|---|
name | yes | key to for other packages to reference |
extends | no | inherits package behavior of the package it extends |
namespace | no | |
abstract | no | declares package to be abstract (no action configurations required in package) |
Simple usage
| Code Block | ||
|---|---|---|
| ||
<struts>
<package name="employee" extends="struts-default" namespace="/employee">
<default-interceptor-ref name="crudStack"/>
<action name="list" method="list"
class="org.apache.struts2.showcase.action.EmployeeAction" >
<result>/empmanager/listEmployees.jsp</result>
<interceptor-ref name="basicStack"/>
</action>
<action name="edit-*" class="org.apache.struts2.showcase.action.EmployeeAction">
<param name="empId">{1}</param>
<result>/empmanager/editEmployee.jsp</result>
<interceptor-ref name="crudStack">
<param name="validation.excludeMethods">execute</param>
</interceptor-ref>
</action>
<action name="save" method="save"
class="org.apache.struts2.showcase.action.EmployeeAction" >
<result name="input">/empmanager/editEmployee.jsp</result>
<result type="redirect">edit-${currentEmployee.empId}.action</result>
</action>
<action name="delete" method="delete"
class="org.apache.struts2.showcase.action.EmployeeAction" >
<result name="error">/empmanager/editEmployee.jsp</result>
<result type="redirect">edit-${currentEmployee.empId}.action</result>
</action>
</package>
</struts>
|
Inherit from more than one package
| Code Block | ||
|---|---|---|
| ||
<struts>
<package name="employee" extends="struts-default, json-default" namespace="/employee">
<action name="list" method="list" class="org.apache.struts2.showcase.action.EmployeeAction" >
<result>/empmanager/listEmployees.jsp</result>
<result type="json">
<param name="root">employees</param>
</result>
</action>
</package>
</struts>
|