The given object has a null identifier
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left.jsp
<li ><div class="header"> <cite></cite><a href="<%=path%>/Vol_update.action" target="rightFrame">编辑信息</a><i></i> </div> </li>
我的action中没有update这个方法,而我却调用了这个方法,才会一直报错
改成
<li ><div class="header"> <cite></cite><a href="<%=path%>/Vol_updateByvolid.action" target="rightFrame">编辑信息</a><i></i> </div> </li>
调用了updateByvolid方法
原因是缺少了值(主键)| 调用错了方法
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