struts2 驗證 json 返回 fielderrors

<result name="input" type="json">    
    <param name="ignoreHierarchy">false</param>  
    <param name="includeProperties">fieldErrors\[\d+\],actionErrors\[\d+\]</param>  
</result>

或者：

<result name="input" type="json">
	<param name="ignoreHierarchy">false</param>
        <param name="includeProperties">fieldErrors.*</param>    
</result>