Ambiguous mapping. Can not map "*** Controller" been method solution

Can Not Mapping Map Ambiguous 'handController' Method.
Public com.smallchill.core.toolbox.ajax.AjaxResult com.smallchill.smtlamp.controller.HandController.AC2off (java.lang.String)
to {[/ Hand / AC1off]}: There already iS 'handController' bean Method,
public com.smallchill.core.toolbox.ajax.AjaxResult com.smallchill.smtlamp.controller.HandController.AC1off (java.lang.String) mapped.

solution:
@ RequestMapping url () repeat , and can be modified for different url;