nested exception is java.lang.NumberFormatException: For input string: “null“]

1 报错原因

Vue前端向后端传值时某个参数传的值为null，后端用Long类型接收，此时会报这个错误。

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

2 解决方案

把表单中id的值由null改为‘’