6-3自由编程
来源:6-3 自由编程
慕粉4119499
2019-07-14 12:01:43
想问一下,最后这个是怎么完成的
如果返回值为false,将结果” 没有找到对应的单词解释”存储到session中,重定向到fail.jsp进行显示。
参考了其他的人的答案都是用的转发
package com.imooc.inquiry; import java.io.IOException; import java.util.HashMap; import java.util.Map; 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 javax.servlet.http.HttpSession; /** * Servlet implementation class inquiry */ @WebServlet("/inquiry") public class inquiry extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public inquiry() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Map map = new HashMap(); map.put("apple", "苹果"); map.put("apple1", "苹果1"); map.put("apple2", "苹果2"); String name = request.getParameter("danci"); if(map.containsKey(name)) { request.setAttribute("name", map.get(name)); request.getRequestDispatcher("/success.jsp").forward(request,response); }else { HttpSession se = request.getSession(); se.setAttribute("name", "没有找到对应的单词解释"); request.getRequestDispatcher("/fail.jsp").forward(request, response); } } }
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="ISO-8859-1"> <title>Insert title here</title> </head> <body> <h1> <%out.println(request.getAttribute("name")); %> </h1> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="ISO-8859-1"> <title>Insert title here</title> </head> <body> <%out.println(session.getAttribute("name")); %> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <form action="/myjsp/inquiry"> <input type="text" name = "danci" placeholder="请输入要查询的单词"> <input type="submit" value="提交"> </form> </body> </html>
1回答
同学将最后的转发改为重定向的方式返回页面就可以呢
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