为什么不对呢?
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 Jstlc */ @WebServlet("/js") public class Jstlc extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public Jstlc() { 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("set", 5); request.getRequestDispatcher("/jstl.jsp").forward(request, response); } }
<%@ 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> <c:if test="${set>0&&(set<=10)}"> <h2 style="color:blue;">1-10之间的整数</h2> </c:if> <c:if test="${set>10&&(set<=20)}"> <h2 style="color:red">10-20之间的整数</h2> </c:if> </body> </html>
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慕田峪1061482
2019-09-25 14:03:37
为什么我自己编写servlet程序时,那个映射地址没有显示出来,而跟着老师视频写servlet的时候映射地址才会显示出来?
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