include动作指令标签的应用（表单录入一个n,实现1到n的累加和）

lxr14555

于 2019-03-17 22:30:21 发布

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本文链接：https://blog.youkuaiyun.com/weixin_39577771/article/details/88628741

版权

add.jsp

<%@ page contentType="text/html;charset=GB2312" %>
<HEAD></HEAD>
<HTML><BODY bgcolor=yellow>
<FONT Size=6>
<FORM action="" method=get name=form>
请输入1至100之间的整数:<INPUT type="text" name="number" style='font-size:28px'/>
<INPUT TYPE="submit" value="确定" name="submit" style='font-size:25px'/>
<%!int n; %>
<% 
	String num=request.getParameter("number");
   	try{n=Integer.parseInt(num);} catch(Exception e){}

%>
<jsp:include page="add1.jsp">
	<jsp:param name="number" value="<%= n%>"/>
</jsp:include>
</FORM>
</FONT>
</BODY>
</HTML>

add1.jsp

<%@ page contentType="text/html;charset=GB2312" %>

<%! 
int i,n,sum;
String num;
%>
<%
	sum=0;
	num=request.getParameter("number");
	try{n=Integer.parseInt(num);}catch(Exception e){}
	for(i=1;i<=n;i++){
		sum=sum+i;
	}
%>
<FONT Size=6>
<P>1到<%=num %>的连续和是：<%= sum %>
</FONT>