报表中的 dateRegClient 字段具有空的 fieldDescription .字段描述用于将字段映射到bean属性名称(发生错误的地方).

The dateRegClient field in the report has an empty fieldDescription. Field descriptions are used to map field to bean property names, whence the error.

删除字段描述或将其设置为 dateRegClient 应该可以避免该错误.

Removing the field description or setting it to dateRegClient should get rid of the error.