jsp怎么判断当有参数n传入时,即if(n!=null) 就执行<%@ include file = "../../Include/check.jsp" %>呢?

Question

<c:if test="${! empty param.n}">
 <%@ include file = "../../Include/check.jsp" %>
</c:if>

Answer 1

<%if(n!=null)%>
 <%@ include file = "../../Include/check.jsp" %>
<%}%>

Answer 2

参照http://community.csdn.net/Expert/TopicView1.asp?id=4188100

Answer 3

<c:if test="${! empty param.n}">
 <%@ include file = "../../Include/check.jsp" %>
</c:if>

Answer 4

<%
if(n!=null)
{
%>
 <%@ include file = "../../Include/check.jsp" %>
<%
}
%>
晕倒，怎么还有这么问的。

Answer 5

<%
String n=request.getParameter("n");
if(n!=null&&n=!""){
%>
<%@ include file = "../../Include/check.jsp" %>
<%
}%>

Answer 6

用标签
<c:if test="${! empty param.n}">
 <%@ include file = "../../Include/check.jsp" %>
</c:if>
要不就直接用 String n=request.getParamerter("n");
           if(n!=null||!(n.trim().equals("")))

Answer 7

象你这样的,我觉得最好把check.jsp做成一个javaBean,如果n!=null&&!"".equals(n),就new这个javaBean,并调用javaBean的method

Answer 8

<%if(n == null)
  n = "";if(n!=null&&n=!""){
%>
<%@ include file = "../../Include/check.jsp" %>
<%
}%>

Answer 9

<%if(n == null)
  n = "";if(!n.equals("")){
%>
<%@ include file = "../../Include/check.jsp" %>
<%
}%>