Validator function ( ) { return null ; }
provide a custom validator instead of the one created by default.the default implementation , assuming jsr-303 is on the classpath , is : org.springframework.validation.beanvalidation.optionalvalidatorfactorybean . leave the return value as null to keep the default . concode_field_sep PlaceHolder placeHolder concode_field_sep void configureDefaultServletHandling concode_elem_sep void configureViewResolvers concode_elem_sep void configureContentNegotiation concode_elem_sep void addFormatters concode_elem_sep void extendMessageConverters concode_elem_sep MessageCodesResolver getMessageCodesResolver concode_elem_sep void addArgumentResolvers concode_elem_sep void addReturnValueHandlers concode_elem_sep void configureMessageConverters concode_elem_sep void configureHandlerExceptionResolvers concode_elem_sep void addCorsMappings concode_elem_sep void configureAsyncSupport concode_elem_sep void addResourceHandlers concode_elem_sep void addViewControllers concode_elem_sep void configurePathMatch concode_elem_sep void addInterceptors concode_elem_sep void extendHandlerExceptionResolvers