JSP中用include标签动态引入其它文件报错：attribute for %>" is not properly terminated

<jsp:include?page="<%=uri?%>/include.jsp"></jsp:include>?

报错：attribute?for?%>"?is?not?properly?terminated?

原因：标签的page属性值可以是相对路径URL或者<%=表达式?%>，但同时只能存在其中一种

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<jsp:include?page="/frame/include.jsp"></jsp:include>?表示绝对路径

<jsp:include?page="frame/include.jsp"></jsp:include>?表示相对路径

<jsp:include?page="<%=uri?%>"></jsp:include>?两个引号与<%=uri?%>之间不能有空格

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