com.jfinal.plugin.activerecord.ActiveRecordException: You can't update model without Primary Key, id can not be null.

jfinal更新信息的时候，返回错误：

com.jfinal.plugin.activerecord.ActiveRecordException: You can't update model without Primary Key, id can not be null.

 

解决：

查看自己设置的ID，是不是与数据库中表的ID一致，注意大小写。