Apache Struts 2 Documentation > Home > Guides > Core Developers Guide > Annotations > KeyProperty Annotation
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Sets the KeyProperty for type conversion.

Usage

The KeyProperty annotation must be applied at field or method level.

This annotation should be used with Generic types, if the key property of the key element needs to be specified.

Parameters

Parameter Required Default Description
value no id The key property value.

Examples

// The key property for User objects within the users collection is the <code>userName</code> attribute.
@KeyProperty( value = "userName" )
protected List<User> users = null;