为什么这段代码不显示输入框而直接跳转到了错误页面
这是主页面代码
程序代码：<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www. <title>one</title>
<jsp:include page="head.txt" />
</head>
<body bgcolor="yellow">
<embed src="f:\1.mp3" />
<form method="post" name="form">
请输入1到100之间的整数:
<input type="text" name="num" value="3"/><br />
<input type="submit" value="提交" name="submit" />
</form>
<jsp:include page="judge.jsp" />
</body>
</html>judge.jsp的代码:
程序代码： <%
String number;
number=request.getParameter("num");
if(number==null)
number="0";
try{
int n=Integer.parseInt(number);
if(n==0){
%> <jsp:forward page="one.jsp" />
<% }
else if(n>=1 && n<=50){
%> <jsp:forward page="two.jsp">
<jsp:param name="number" value="<%= n%>" />
</jsp:forward>
<% }
else if(n>50 && n<=100){
%> <jsp:forward page="three.jsp">
<jsp:param name="number" value="<%= n%>" />
</jsp:forward>
<% }
else{
%> <jsp:forward page="error.jsp">
<jsp:param name="mess" value="1" />
</jsp:forward>
<% }
}catch(Exception e){
%> <jsp:forward page="error.jsp">
<jsp:param name="mess" value="2" />
</jsp:forward>
<% }
%>下面是error.jsp的代码以及运行截图
程序代码：<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www. http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>error.jsp</title>
<jsp:include page="head.txt" />
</head>
<body bgcolor="yellow">
<font size="5" color="red">This is error.jsp</font>
<font size="2">
<%
String s=request.getParameter("mess");
out.println("<br />传递过来的错误信息:"+s);
%>
</font>
</body>
</html>
