org.springframework.validation.BeanPropertyBindingResult: 1 errors Field error in object 'promotionVo' on field 'promotseq': rejected value [" data[i].promotseq "]; codes [typeMismatch.promotionVo.promotseq,typeMismatch.promotseq,typeMismatch.int,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [promotionVo.promotseq,promotseq]; arguments []; default message [promotseq]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'promotseq'; nested exception is java.lang.NumberFormatException: For input string: ""data[i].promotseq""]