<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/html" href="styles.css"> --> </head> <body> 半径为<%=r %>的圆的面积为：<br> <% =area(r)%> <%! double area(double r){ return r*r*pi; } %> <%! double r=10; final double pi=3.14; %> </body></html>编译运行后显示的是 jsp文件无法编译Java类 是什么原因谢谢解答！！！
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