尝试了许多,没有解决!
那就先说一下问题吧。
代码:
two.jsp
<%@ page contentType = "text/html;charset = UTF-8" pageEncoding = "UTF-8" %>
<% double a = 3,b = 4,c = 5;
%>
加载example2_3.jsp计算三边为<%= a %>、<%= b %>、<%= c %>的三角形的面积:
/jsp:include
</BODy>
one.jsp
<%@ page contentType = "text/html;charset = UTF-8" pageEncoding = "UTF-8" %>
<!-- include动作标记示例 -->
<%! public String getArea(double a,double b,double c) {
if (a+b>c && a+c>b && b+c>a) {
double p = (a+b+c)/2.0;
double area = Math.sqrt(p*(p-a)*(p-b)*(p-c));
return ""+area;
} else {
return ""+a+","+b+","+c+"不能构成一个三角形。。。。";
}
}
%>
<% String sideA = request.getParameter("sideA");
String sideB = request.getParameter("sideB");
String sideC = request.getParameter("sideC");
double a = Double.parseDouble(sideA);
double b = Double.parseDouble(sideB);
double c = Double.parseDouble(sideC);
%>
我是被加载的文件,负责计算三角形的面积
给我传递的三边是:<%= sideA%>、<%= sideB %>、<%= sideC %>
三角形的面积:<%= getArea(a,b,c) %>