如没有特殊处理，则会报以下错误：
Field error in object 'archBO' on field 'createTime': rejected value [2021-07-15 16:20:30]; codes []; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes []; arguments []; default message [createTime]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'java.util.Date' for property 'createTime'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@com.baomidou.mybatisplus.annotation.TableField @io.swagger.annotations.ApiModelProperty @com.fasterxml.jackson.annotation.JsonFormat java.util.Date] for value '2021-07-15 16:20:30'; nested exception is java.lang.IllegalArgumentException]
解决方式之一：在对象的日期字段上增加以下注解
@DateTimeFormat来控制入参，@JsonFormat来控制出参
@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
@JsonFormat(locale="zh", timezone="GMT+8", pattern="yyyy-MM-dd HH:mm:ss")
