请用所给代码搭建一个MVC结构的选择题答题模块
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[待解决问题]
本人新手菜鸟，完全摸不着头脑，题目代码如下，请大神指点一下！谢谢各位！
要求如下:
（1）在页面上能够显示所有的题目列表的基本信息;
（2）能够显示当前题目、题目选项；
（3）能够通过JavaScript判断答案的正确性；
（4）学生能够通过上一题、下一题来进行题目选择。
1// JSP页面代码如下： 2 3 <%@ page language="java" contentType="text/html; charset=utf-8" 4 pageEncoding="utf-8"%> 5 <%@ page import="java.util.*" %> 6 <%@ page import="studentlab.mvc.*" %> 7 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 8 <html> 9 <head> 10 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 11 <title>Insert title here</title> 12 </head> 13 <body> 14 <% 15 List<Question> list = (List<Question>)request.getAttribute("list"); 16 Question q = (Question)request.getAttribute("question"); 17 %> 18 <a href="exam?id=<%=q.getId()-1%>">上一题</a> <a href="exam?id=<%=q.getId()+1%>">">下一题</a> 19 </body> 20 <div>第<%=q.getId()%>题 <%=q.getDescription()%></div> 21 22 </html> 23 24 //ExamServlet代码如下 25 26 package studentlab.mvc; 27 28 import java.io.IOException; 29 import javax.servlet.ServletException; 30 import javax.servlet.annotation.WebServlet; 31 import javax.servlet.http.HttpServlet; 32 import javax.servlet.http.HttpServletRequest; 33 import javax.servlet.http.HttpServletResponse; 34 35 /** 36 * Servlet implementation class ExamServlet 37 */ 38 @WebServlet("/exam") 39 public class ExamServlet extends HttpServlet { 40 private static final long serialVersionUID = 1L; 41 42 /** 43 * @see HttpServlet#HttpServlet() 44 */ 45 public ExamServlet() { 46 super(); 47 // TODO Auto-generated constructor stub 48 } 49 50 /** 51 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) 52 */ 53 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 54 55 } 56 57 /** 58 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 59 */ 60 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 61 doGet(request, response); 62 } 63 64 } 65 66 67 68 //Question代码如下 69 70 package studentlab.mvc; 71 72 public class Question { 73 private int id; 74 private String description; 75 private String options; 76 private String answer; 77 78 public int getId() { 79 return id; 80 } 81 public void setId(int id) { 82 this.id = id; 83 } 84 public String getDescription() { 85 return description; 86 } 87 public void setDescription(String description) { 88 this.description = description; 89 } 90 public String getOptions() { 91 return options; 92 } 93 public void setOptions(String options) { 94 this.options = options; 95 } 96 public String getAnswer() { 97 return answer; 98 } 99 public void setAnswer(String answer) { 100 this.answer = answer; 101 } 102 103 } 104 105// QuestionDao代码如下： 106 107 108 109 package studentlab.mvc; 110 111 import java.sql.*; 112 import java.util.*; 113 //import java.util.List; 114 115 public class QuestionDao { 116 public List<Question> queryAll(){ 117 List<Question> list =new ArrayList<Question>(); 118 String url="jdbc:h2:D:/temp/h2/mydb"; 119 try { 120 Class.forName("org.h2.Driver"); 121 Connection conn = DriverManager.getConnection(url,"sa",""); 122 Statement stmt = conn.createStatement(); 123 String sql="select * from exam"; 124 ResultSet rs = stmt.executeQuery(sql); 125 while(rs.next()){ 126 Question q = new Question(); 127 q.setId(rs.getInt(1)); 128 q.setDescription(rs.getString(2)); 129 q.setOptions(rs.getString(3)); 130 q.setAnswer(rs.getString(3)); 131 list.add(q); 132 } 133 rs.close(); 134 stmt.close(); 135 conn.close(); 136 } catch (ClassNotFoundException e) { 137 // TODO Auto-generated catch block 138 e.printStackTrace(); 139 } catch (SQLException e) { 140 // TODO Auto-generated catch block 141 e.printStackTrace(); 142 } 143 144 return list; 145 } 146 147 public Question queryById(int id){ 148 Question q = null; 149 150 return q; 151 152 } 153 154 }
所有回答(2)
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代码也不贴代码块里,让人怎么看!
抱歉啊 不知道这个功能TT
@大狗比爱吃葱:
看了一下, 说的挺明白了, 不知道你哪里不清楚?
1.获取所有题目列表, 进行页面展示(获取数据, 页面可以用el表达式+ c标签, 或者 用小脚本嵌套html代码)
2.获取某一题目, 展示相关选项(根据题目id获取题目, 然后页面展示数据)
3.选择选项后, 用js判断是否与答案匹配.
4. 同 2,
@、熙和: 这个获取题目进行展示什么写？他的dopost，doget返回的是什么呢？
@大狗比爱吃葱:
根据请求传过来的题目id, 查询到题目的详情信息, 然后放到request作用域里, 可以返回页面, 在页面上从request把数据显示出来.
或者页面使用ajax请求, servlet get/post返回题目详情的json格式数据.
要是不理解, 你去找JSP的资料好好看看
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我正在开发这个项目，有问题找我1206284818
