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The action-default package defines result types for the Results provided with the framework. If your package uses a custom result type, you can add it to your package.
types.
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<xwork>
<include name="action-default.xml"/>
<package name="default" extends="action-default">
<result-types>
<result-type name="image" class="tutorial.ImageResult" />
</result-types>
<action name="image" class="tutorial.ImageAction">
<result name="success" type="image"/>
</action>
</package>
</xwork>
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Another way to reduce the amount of configuration in the action.xml is through the use of global result mappings. Web applications often have a common set of results that are used across many action mappings. Common results include redirects to login actions and permission-denied pages. Rather than define each of these results in every action mapping, the framework lets you centralize the definitions for the common pages.
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<package name="default" extends="webwork-default">
<global-results>
<result name="login"
type="redirect">/login!default.action</result>
<result name="unauthorized">/unauthorized.jsp</result>
</global-results>
<!-- other package declarations -->
</package>
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