一直显示404，不知道哪里错了，请老师看看

来源：2-5 JSTL判断标签

慕仰7036876

2020-05-26 19:44:09

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <!-- 在java或者jsp文件中输入alt+/可出现智能提示 -->
<%@ 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>
    <h1>${requestScope.score}</h1>
    <c:if test="${score >= 60}">
        <h1 style = "color : green">恭喜，你已通过测试</h1>
    </c:if>
    <c:if test="${score < 60}">
        <h1 style = "color : red">对不起，请再接再厉</h1>
    </c:if>
</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;
/**
 * Servlet implementation class JstlServlet
 */
@WebServlet("/jstl")
public class JstlServlet extends HttpServlet {
 private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public JstlServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
 /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  request.setAttribute("score", 58);
  request.setAttribute("grade", "B");
  request.getRequestDispatcher("/core.jsp").forward(request, response);
 }
}

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