我这样为什么不对，请老师帮我看看谢谢

来源：2-8 自由编程

qq_慕移动0378797

2019-11-19 20:33:42

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="http://localhost/jstl/p">
	<input type="text" name="num" >
	 <input type="submit" value="提交">
</form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
${requestScope.x};
<c:if test="${0<x}" && test="${x<=10}">
		<h1 style="color=bule">1-10之间的整数</h1>
</c:if>
<c:if test="${x>10}"&&test="${x<=20}">
	<h1 style="color=bule">11-20之间的整数</h1>
</c:if>
<c:otherwise>
	<h1 style="color=red">数字超过想验证范围</h1>
</c:otherwise>

</body>
</html>

package com.imooc.jstl;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.catalina.startup.SetAllPropertiesRule;

/**
 * Servlet implementation class p
 */
@WebServlet("/p")
public class p extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public p() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String num=request.getParameter("num");
		int a=Integer.parseInt(num);
		request.setAttribute("x", a);
		request.getRequestDispatcher("/judeg.jsp").forward(request, response);
	
	}

}

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