Exception occurred during processing request: The given object has a null identifier: com.zsn.crm.Model.SaleVisit; nested exception is org.hibernate.TransientObjectException: The given object has a nu
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edit.jsp页面没有加入隐藏字段 id ,导致模型驱动封装时缺少id ,,调用update更新数据库时出错!edit.jsp页面没有加入隐藏字段 id ,导致模型驱动封装时缺少id ,,调用update