exception.jsp
<%@ page language="java" errorPage="ErrorHand.jsp" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
int [] intArray = new int [5];
for(int i=0 ; i<=5 ; i++){
intArray[i] = i;
}
%>
<%!Vector v =null ;%>
<%=v.sieze() %>
</body>
</html>
ErrorHand.jsp
<%@ page language="java" isErrorPage="true" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%=exception.getMessage()%>
</body>
</html>
null能sieze()？？？？？
!Vector v =null （这里啥意思，如果是判断用双等号==）
<%!%> 一般用来定义方法的，尽量不要写代码片段，写代码片段用<%%>中