切换不同的页面，头和尾保持不变

<@--第一种--@>
%@include file="common/header.jsp"%>
<%
    int i=1/1;
    out.println(i);
%>
<%@include file="common/footer.jsp"%>

<@--第二种--@>
<jsp:include page="common/header.jsp"></jsp:include>
<%
    int d=1/1;
    out.println(d);
%>
<jsp:include page="common/footer.jsp"></jsp:include>