软件工程结对作业01

结对人：胡建峰、高雪彤

设计思想

在以前的程序基础上两人结合开发web系统。

首先编写了一个登录界面，实现的是不同用户，不同题库的功能。

然后进入主页，主页中在登录成功后显示用户名，并有开始答题，查看历史错题和注销三个按钮。开始答题按钮可以供用户选择出题的条件生成题目，查看历史错题会调出数据库中历史的错题，也可以重新做这些错题，注销会注销当前用户，返回登录界面。

出题界面会显示用户的条件，在下面生成题目，后面有一个输入框，供用户答题，不会的可以空下，最后点击提交可以进入结果验证页面，结果页面中，会对输入和信息与数据库中的作对比，正确的显示一个正确的图片，错误会显示一个错误的图片并显示正确答案，并将错误答案和信息存入数据库。

重做错题，从数据库中导出错题和错误答案，在修改提交后，会进行判断。

在最后对页面使用了Javabean、servlet、ajax、jQuery，并对页面进行了美化。

源程序代码

package bean;

import java.sql.*;
import com.db.DB;

public class User {
    private String username;
    private String userpass;
    
    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getUserpass() {
        return userpass;
    }

    public void setUserpass(String userpass) {
        this.userpass = userpass;
    }

    @SuppressWarnings("static-access")
    public boolean validate(String user, String pass) {
        DB db = new DB();
        String sq = "select * from [user] where [id]=? and [pass]=?";
         PreparedStatement st = null;
         try {
            st = db.getCoon().prepareStatement(sq);
            st.setString(1, user);
             st.setString(2, pass);
             ResultSet rs = st.executeQuery();
             if(rs.next())
            {
                 return true;
            }
             else
             {
                 return false;
             }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return false;     
    }

}

package calculat;
import java.util.Random;

public class Cal_zfs{
    private char fh;
    private String shu1;
    private String shu2;
    private String result;
    
    public char getFh() {
        return fh;
    }

    public String getResult() {
        return result;
    }

    public String getShu1() {
        return shu1;
    }

    public String getShu2() {
        return shu2;
    }
    public Cal_zfs()
    {
        
    }
    
    public Cal_zfs(boolean cc, int w)
    {
        int fzi1;
        int fmu1;
        int fzi2;
        int fmu2;
        char [] fu = new char [4];//生成符号，控制有无乘除
        fu[0] = '-';
        fu[1] = '+';
        fu[2] = '/';
        fu[3] = '*';
        if(cc)
            fh = fu[new Random().nextInt(4)];
        else
            fh = fu[new Random().nextInt(2)];
        
        
        if(w == 1)
        {    
            fmu1 = new Random().nextInt(9) + 1;
            fmu2 = new Random().nextInt(9) + 1;
        }
        else if(w == 2)
        {
            fmu1 = new Random().nextInt(99) + 1;
            fmu2 = new Random().nextInt(99) + 1;
        }
        else
        {
            fmu1 = new Random().nextInt(999) + 1;
            fmu2 = new Random().nextInt(999) + 1;
        }
        
        fzi1 = new Random().nextInt(fmu1) + 1;
        fzi2 = new Random().nextInt(fmu2) + 1;
        int gy = gys(fzi1, fmu1);
        int gy2 = gys(fzi2, fmu2);
        if(fzi1 == fmu1)
            shu1 = "1";
        else
            shu1 = fzi1 / gy + "/" + fmu1 / gy;
        if(fzi2 == fmu2)
            shu2 = "1";
        else
            shu2 = fzi2 / gy2 + "/" + fmu2 / gy2;
        
        int fm = 0, fz = 0;
        if(fh == '+')
        {
            fm = fmu1 * fmu2;
            fz = fmu1 * fzi2 + fmu2 * fzi1;
        }
        else if(fh == '-')
        {
            fm = fmu1 * fmu2;
            fz = fmu2 * fzi1 - fmu1 * fzi2;
        }
        else if(fh == '*')
        {
            fm = fmu1 * fmu2;
            fz = fzi1 * fzi2;
        }
        else
        {
            fm = fmu1 * fzi2;
            fz = fzi1 * fmu2;
        }
        
        int g = gys(fz, fm);
        if(fz == fm)
            result = "1";
        else
            result = fz / g + "/" + fm / g;
    }
    
    public int gys(int s1, int s2)
    {
        int gy = 1;
        for(int i = 1; i <= (s1 < s2 ? s1 : s2); i++)
        {
            if(s1 % i == 0 && s2 % i == 0)
                gy = i;
        }
        return gy;
    }
    
    public String show()
    {
        return shu1 + " " + fh + " " + shu2;
    }
}

package calculat;
import java.util.Random;

public class Cal_zs{
    private char fh;
    private int shu1;
    private int shu2;
    private String result;
    
    public String getResult() {
        return result;
    }
    public Cal_zs()
    {}
    public char getFh() {
        return fh;
    }

    public int getShu1() {
        return shu1;
    }

    public int getShu2() {
        return shu2;
    }
    public Cal_zs(boolean cc,int wei)
    {
        char [] fu = new char [4];//生成符号，控制有无乘除
        fu[0] = '-';
        fu[1] = '+';
        fu[2] = '/';
        fu[3] = '*';
         
        if(cc)
            fh = fu[new Random().nextInt(4)];
        else
            fh = fu[new Random().nextInt(2)];
        if(wei == 1)
        {    
            shu1 = new Random().nextInt(9) + 1;
            shu2 = new Random().nextInt(9) + 1;
        }
        else if(wei == 2)
        {
            shu1 = new Random().nextInt(99) + 1;
            shu2 = new Random().nextInt(99) + 1;
        }
        else
        {
            shu1 = new Random().nextInt(999) + 1;
            shu2 = new Random().nextInt(999) + 1;
        }
        
        if(fh == '+')
            result = shu1 + shu2 + "";
        else if(fh == '-')
            result = shu1 - shu2 + "";
        else if(fh == '*')
            result = shu1 * shu2 + "";
        else
        {
            if(shu1 >= shu2)
            {
                if(shu1 % shu2 == 0)
                    result = shu1/shu2 + "";
                else
                {
                    int z = shu1 / shu2;
                    result = z + "'" + (shu1 - z * shu2) +"/" + shu2;
                }
            }
            else
                result = shu1 + "/" + shu2;
        }
    }
    
    public String show()
    {
        return shu1 + " " + fh + " " + shu2;
    }
    
    public boolean isInteger(){ 
        double r, s1 = shu1, s2 = shu2;
        if(fh == '/')
        {    
            r = s1 / s2;
            String str = r + "";
            for(int i = 0;i < str.length();i++)
            {
                if(str.charAt(i) == '.' && i == str.length() - 2 && str.charAt(i + 1) == '0')
                    return true;
            }
            return false;
        }
        else
            return true;
        
         
    } 
}

package calculat;

public class shu {
    
    private Cal_zs [] c1 = new Cal_zs [100];
    private Cal_zfs [] c2 = new Cal_zfs [100];
    boolean cc;
    int N;
    int wei;

    public void setN(int n) {
        N = n;
    }

    public void setwei(int w)
    {
        wei = w;
    }
    public void setCc(boolean cc) {
        this.cc = cc;
    }

    public shu()
    {
        
    }
    
    public shu(boolean cc, int w, boolean fs, boolean ys)
    {
        for(int i = 0;i < 100;i++)
        {
            c1[i] = new Cal_zs(cc, w);
            while((ys == false && yu(c1[i].getResult())) || (fs == false && c1[i].getResult().charAt(0) == '-'))
            {
                c1[i] = new Cal_zs(cc, w);
            }
            for(int j = 0;j < i;j++)
            {
                if(c1[i].getShu1() == c1[j].getShu1() && c1[j].getShu2() == c1[i].getShu2()&& 
                    c1[i].getFh() == c1[j].getFh())
                {
                    c1[i] = new Cal_zs(cc, w);
                    j = 0;
                }
            }
            
            c2[i] = new Cal_zfs(cc, w);
            while(fs == false && c2[i].getResult().charAt(0) == '-')
            {
                c2[i] = new Cal_zfs(cc, w);
            }
            for(int k = 0;k < i;k++)
            {
                if(c2[i].getShu1().equals(c2[k].getShu1()) && c2[k].getShu2().equals(c2[i].getShu2()) && 
                        c2[i].getFh() == c2[k].getFh())
                {
                    c2[i] = new Cal_zfs(cc, w);
                    k = 0;
                }
            }
        }
    }
    
    public boolean yu(String str)
    {
        for(int i = 0;i < str.length(); i++)
        {
            if(str.charAt(i) == '/')
                return true;
        }
        return false;
    }
    
    public String show1(int i)
    {
        return c1[i].show();
    }
    public String show2(int i)
    {
        return c2[i].show();
    }

    public String result1(int i)
    {
        return c1[i].getResult() + "";
    }
    public String result2(int i)
    {
        return c2[i].getResult() + "";
    }
}

package com.db;

import java.sql.*;

public class DB {
    private static final String driverStr = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
    private static final String connStr = "jdbc:sqlserver://localhost:1433; DatabaseName=calculate";
    private static final String dbusername = "sa";
    private static final String dbpassword = "4980";
    private static Connection coon = null;

    public static Connection getCoon() {
        return coon;
    }

    static{
        try{
            Class.forName(driverStr);
            coon = DriverManager.getConnection(connStr, dbusername, dbpassword);
        } catch (ClassNotFoundException e){
            e.printStackTrace();
        } catch (SQLException e){
            e.printStackTrace();
        }
    }
    
    public void closeCon(Connection con) {
        if(coon!=null){
            try {
                coon.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    
    public static void main(String[] args) {
        try {
            DB.getCoon();
            System.out.println("数据库连接成功");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

package servelet;

import java.io.IOException;
import javax.servlet.RequestDispatcher;
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.swing.JOptionPane;

import bean.User;

@WebServlet("/loginservlet")
public class loginservlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public loginservlet() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String user = request.getParameter("user");
        String pass = request.getParameter("pass");
        
        User use = new User();
        boolean b =use.validate(user, pass);
        String forward;
        
        if(b)
        {
            request.getSession().setAttribute("user", user);
            forward = "first.jsp";
        }
        else
        {
            JOptionPane.showMessageDialog(null, "用户名或密码输入有误！");  
            forward = "login.jsp";
        }
        
        
        RequestDispatcher dispatcher = request.getRequestDispatcher(forward);
        dispatcher.forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>登录</title>
<script type="text/javascript">
    function judge(form)
    {
        user = form.user.value;
        pass = form.pass.value;
        
        if(user == "")
        {
            alert("用户名为空！");
            form.user.focus();
            return false;
        }
        if(pass == "")
        {
            alert("密码为空！");
            form.pass.focus();
            return false;
        }
    }
</script>
<style>
    body,p,div,ul,li,h1,h3,h4,h5,h6{
        margin:0;
        padding: 0;
    }
    h2{
        color:red;
        text-align: center;
        margin:150px auto;
    }
    body{
        background: #E9E9E9;
    }
    
    #login{
         400px;
        height: 250px;
        background: #FFF;
        margin:50px auto;
        position: relative;
    }
    #login form p{
        text-align: center;
    }
    
    #user{
        background:url(images/user.png) rgba(0,0,0,0.1) no-repeat;
         200px;
        height: 30px;
        border:solid #ccc 1px;
        border-radius: 3px;
        padding-left: 32px;
        margin-top: 50px;
        margin-bottom: 30px;
    }
    #pwd{
        background: url(images/pwd.png) rgba(0,0,0,0.1) no-repeat;
         200px;
        height: 30px;
        border:solid #ccc 1px;
        border-radius: 3px;
        padding-left: 32px;
        margin-bottom: 30px;
    }
    #submit{
         232px;
        height: 30px;
        background: rgba(0,0,0,0.1);
        border:solid #ccc 1px;
        border-radius: 3px;
    }
    
    #submit:hover{
        cursor: pointer;
        background:#D8D8D8;
    }
</style>
</head>
<body>
    <h2>答题系统登录界面</h2>
<div id="login">    
    <form name="form" action="loginservlet" method="post" onsubmit="return judge(form)">
        <p><input type="text" name="user" id="user" placeholder="用户名"></p>
        <p><input type="password" name="pass" id="pwd" placeholder="密码"></p>
        <p><input type="submit" id="submit" value="登录"></p>
    </form>
</div>
</body>
</html>

<%@ page language="java" import="java.sql.*" contentType="text/html; charset=gb2312"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript" src="js/jquery-1.11.3.min.js"></script>
<script type="text/javascript">
    $(function(){
        $("#chu").hide();
        $("#cuo").hide();
    
        $("#zhuxiao").click(function(){
            $(location).attr('href', 'login.jsp');    
        });
        
        $("#chuti").click(function(){
            $("#chu").show();
            $("#cuo").hide();
        });
        
        $("#cuoti").click(function(){
            $("#cuo").show();
            $("#chu").hide();
        });
    });
</script>
    <title>出题</title>
    <style type="text/css">
        h2{
            color:red;
        }
        #b{
            text-align: center;
            height: 60px;
        }
        body{ 
        background:url("images/bg.jpg")
        no-repeat;
        background-size:cover;
    }
    </style>
</head>
<body>
    <h2 align="center">出题器</h2>
    <h3 align="center">${sessionScope.user}您好，欢迎登录！</h3>
    
    <div id="b">
        <input type="button" id="chuti" value="开始出题"/>
        <input type="button" id="cuoti" value="查看历史错题"/>
        <input type="button" id="zhuxiao" value="注销登录"/>
    </div>
    
    <div id="chu"> 
        <form name="form1" action="chuti.jsp" method="post">
        <table align="center">
            <tr>
                <td>题目类型:</td>
                <td>
                    <select name="lei">
                      <option value="整数" selected>整数</option>
                      <option value="真分数">真分数</option>
                      <option value="混合">混合</option>
                    </select>
                </td>  
            </tr>
            <tr>
                <td>是否有乘除法:</td>
                <td>
                    <input type="radio" name="cc" value="无" checked>无
                    <input type="radio" name="cc" value="有">有
                </td>
            </tr>
            <tr>
                <td>是否有括号:</td>
                <td>
                    <input type="radio" name="kh" value="无" checked>无
                    <input type="radio" name="kh" value="有">有 (暂未实现)
                </td>
            </tr>
            <tr>
                <td>数值范围:</td>
                <td>
                    <select name="wei">
                      <option value="一位数" selected>一位数</option>
                      <option value="两位数">两位数</option>
                      <option value="三位数">三位数</option>
                    </select>
                </td>  
            </tr>
            <tr>
                <td>加减有无负数:</td>
                <td>
                    <input type="radio" name="fushu" value="无" checked>无
                    <input type="radio" name="fushu" value="有">有
                </td>
            </tr>
            <tr>
                <td>除法有无余数:</td>
                <td>
                    <input type="radio" name="yushu" value="无" checked>无
                    <input type="radio" name="yushu" value="有">有
                </td>
            </tr>
            <tr>
                <td>题量</td>
                <td>
                    <input type="text" name="num" value="1">不大于100题
                </td>
            </tr>
            <tr>
                <td>
                    <input type="hidden" name="user" value="${sessionScope.user}"/>
                </td>
                <td><input type="submit" value="开始出题！"></td>
            </tr>
        </table>
        </form>
    </div>
    
    <div id="cuo" align="center">
    <form  action="cuo.jsp" method="post">
        <table>
            <th>错题题目</th>
            <th>&nbsp;</th>
            <th>错题答案</th>
            <jsp:useBean id="db" class="com.db.DB" scope="request"/>
            <%
            String user = request.getSession().getAttribute("user").toString();
            String sq = "select * from subject where cuo=1 and [user]=?";
             PreparedStatement st = null;
             st = db.getCoon().prepareStatement(sq);
             st.setString(1, user);
             ResultSet rs = st.executeQuery();
            while(rs.next())
            {
                out.print("<tr><td>" + rs.getString(2) + "</td><td>&nbsp;=&nbsp;</td>");
                out.print("<td>" + rs.getString(5) + "</td>");
            %>
                </tr>
            <%} %>
            <tr>
                <td><input type="hidden" name="user" value=<%=user %>></td>
                <td><input type="submit" value="重新做题"></td>
            <tr>
        </table>
    </form>
    </div>
</body>
</html>

<%@ page language="java" import="java.util.*, java.sql.*, calculat.shu" contentType="text/html; charset=gb2312"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<fmt:requestEncoding value="gb2312"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<style type="text/css">
    h2{color:red}
    
    .tb1{
    border-left-style:solid;
    border-bottom-style:solid;
    border-top-style:solid;
    border-right-style:solid;
    border-2px;
    }
    
    #submit{
        height: 30px;
        background: rgba(0,0,0,0.1);
        border:solid #ccc 1px;
        border-radius: 3px;
    }
    
    #submit:hover{
        cursor: pointer;
        background:#D8D8D8;
    }
</style>
<script type="text/javascript">
  var i = 0;
  var Color = new Array("#0000FF", "#99FF00", "#660033", "#CC66CC", "#FFFF33");
  function change(){
      if(i > Color.length - 1)
          i = 0;
      table1.style.borderColor = Color[i];
      i++;
      setTimeout("change()", 500);
  }
</script>
    <title>出题</title>
</head>
<body onload="change()">
    <h1 align="center">题目</h1>
      <table id="table1" align="center" class="tb1">
          <tr>
              <td>题目类型:</td>
              <td>${param.lei}</td>
              <td>&nbsp;&nbsp;</td>
              <td>是否有乘除法:</td>
              <td>${param.cc}</td>
          </tr>
          <tr>
              <td>是否有括号:</td>
              <td>${param.kh}</td>
              <td>&nbsp;&nbsp;</td>
              <td>数值范围:</td>
              <td>${param.wei}</td>
          </tr>
          <tr>
              <td>加减有无负数:</td>
              <td>${param.fushu}</td>
              <td>&nbsp;&nbsp;</td>
              <td>除法有无余数:</td>
              <td>${param.yushu}</td>
          </tr>
      </table>
      
      <h2 align="center">请填写答案：</h2>
      <form name="form2" action="result.jsp" method="post">
          <table align="center">
          <tr>
              <th>题目</th>
              <th>&nbsp;</th>
              <th>答案</th>
          </tr>
          
          <jsp:useBean id="c" class="calculat.shu" scope="request"/>
          <jsp:useBean id="db" class="com.db.DB" scope="request"/>
          <%
          boolean cc = true;//有无乘除，并赋值
          if((request.getParameter("cc")).equals("无"))
          {
              cc = false;
          }
          boolean kh = true;//有无乘除，并赋值
          if((request.getParameter("kh")).equals("无"))
          {
              kh = false;
          }
          int w;
          if(request.getParameter("wei").equals("一位数"))
          {
              w = 1;
          }
          else if(request.getParameter("wei").equals("两位数"))
          {
              w = 2;
          }
          else
          {
              w = 3;
          }
           
          boolean fs = true;
          if(request.getParameter("fushu").equals("无"))//负数
          {
              fs = false;
          }
          boolean ys = true;
          if(request.getParameter("yushu").equals("无"))//余数
          {
              ys = false;
          }
          
          //生成算式
          c = new shu(cc, w, fs, ys);
          int N = Integer.parseInt(request.getParameter("num"));//出题数
          c.setN(N);
          
          String str = request.getParameter("lei");//出题类型
          c.setCc(cc);
         
          //清空数据库中前N个元素
          for(int i = 0;i < N;i++)
          {
              String sql="delete from subject where num=" + (i+1) + "and [user]='" + request.getParameter("user") +"'";//生成一条sql语句
              Statement stmt = db.getCoon().createStatement();
              stmt.execute(sql);
          }
          
          //生成算式，并存储在数据库中
          String s = "", q = "";
          for(int i = 0;i < N;i++)
            {
            out.print("<tr><td>");
              if(str.equals("整数"))
              {
                  q = c.show1(i);
                  out.print(q + "</td>");
                  s = c.result1(i);
              }
              else if(str.equals("真分数"))
              {
                  q = c.show2(i);
                  out.print(q + "</td>");
                  s = c.result2(i);
              }
              else
              {
                  if((new Random().nextInt(10)) % 2 == 0)
                  {
                      q = c.show1(i);
                      out.print(q + "</td>");
                      s = c.result1(i);
                  }
                  else
                  {
                      q = c.show2(i);
                      out.print(q + "</td>");
                      s = c.result2(i);
                  }
              }
              String sql = "insert into subject (num, question,answer,[user]) values (?,?,?,?)";
              PreparedStatement pstmt = null;
              pstmt = db.getCoon().prepareStatement(sql);
              pstmt.setString(1, i+1+"");
              pstmt.setString(2, q);
              pstmt.setString(3, s);
              pstmt.setString(4, request.getParameter("user"));
              pstmt.executeUpdate();
          %>
             <td>=</td>
             <td><input name="result<%=i %>" id="result" type="text">
             </td></tr>
          <%} %>
          <tr>
          <td>
              <input type="hidden" name="num" value="${param.num}">
          </td>
          <td>
              <input type="hidden" name="user" value="<%=request.getParameter("user")%>"/>
          </td>
          </tr>
          <tr>
              <td></td>
              <td></td>
              <td><input type="submit" id="submit" value="点击提交答案"></td>
          </tr>
          </table>
      </form>
</body>
</html>

<%@ page language="java" import="java.sql.*" contentType="text/html; charset=gb2312"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>结果</title>
    <style type="text/css">
    a{
    text-align:center;
    color:blue;
    }
    </style>
</head>
<body>
    <h1 align="center">成绩</h1>
    <table align="center">
    <jsp:useBean id="db" class="com.db.DB" scope="request"/>
    <%
        int N = Integer.parseInt(request.getParameter("num"));//出题数
        String user = request.getParameter("user");
        String x = "";
        for(int i = 0;i < N;i++)
        {
            x = (String)request.getParameter("result"+i);
            String sq = "select * from subject where num=? and [user]=?";
             PreparedStatement st = null;
             st = db.getCoon().prepareStatement(sq);
             st.setString(1, i+1+"");
             st.setString(2, user);
             ResultSet rs = st.executeQuery();
            while(rs.next())
            {
                out.print("<tr><td>" + rs.getString(2) + "</td><td>&nbsp;=&nbsp;</td>");
                if(rs.getString(3).equals(x))
                {
                    out.print("<td>" + x + "</td>");
                    %>
                    <td><img alt="正确" src="images/accept.png"></td>
                    </tr>
                    <%
                }
                else 
                {
                    out.print("<td>" + x + "</td>");
                    %>
                    <td><img alt="错误" src="images/gif-0130.gif">正确答案为<%=rs.getString(3) %></td>
                    </tr>
                    <%
                    String geng = "update subject set cuo = '1',my=?,num=? where [user]=? and num=?";
                    st = db.getCoon().prepareStatement(geng);
                    st.setString(1, x);
                    st.setInt(2, 100+i+1);
                    st.setString(3, user);
                    st.setInt(4, i+1);
                    st.executeUpdate();
                }
            }
        }
     %>
    </table>
    <div align="center">
        <a href="first.jsp">返回出题界面</a>
    </div>
</body>
</html>

<%@ page language="java" import="java.sql.*" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>错题重做</title>
</head>
<body>
    <h2 align="center">请填写答案：</h2>
      <form name="form2" action="c_result.jsp" method="post">
          <table align="center">
          <tr>
              <th>题目</th>
              <th>&nbsp;</th>
              <th>答案</th>
          </tr>
          
          <jsp:useBean id="db" class="com.db.DB" scope="request"/>
          <%
              String user = request.getParameter("user");
              int i = 0;
            String sq = "select * from subject where cuo=1 and [user]='" + user +"'";
             PreparedStatement st = null;
             st = db.getCoon().prepareStatement(sq);
             ResultSet rs = st.executeQuery();
            while(rs.next())    
            {
          %>
               <tr>
                    <td><%=rs.getString("question")%></td>
                 <td>=</td>
                 <td><input name="result<%=i++ %>" value=<%=rs.getString("my")%> type="text"></td>
               </tr>
          <%} %>
          <tr>
          <td>
              <input type="hidden" name="num" value="<%=i%>"/>
          </td>
          <td>
              <input type="hidden" name="user" value="<%=request.getParameter("user")%>"/>
          </td>
          </tr>
          <tr>
              <td></td>
              <td></td>
              <td><input type="submit" id="submit" value="点击提交答案"></td>
          </tr>
          </table>
      </form>
</body>
</html>

<%@ page language="java" import="java.sql.*" contentType="text/html; charset=gb2312"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>结果</title>
    <style type="text/css">
    a{
    text-align:center;
    color:blue;
    }
    </style>
</head>
<body>
    <h1 align="center">成绩</h1>
    <table align="center">
    <jsp:useBean id="db" class="com.db.DB" scope="request"/>
    <%
        int N = Integer.parseInt(request.getParameter("num"));//出题数
        String user = request.getParameter("user");
        String x = "";
        int i = 0;
           
           String sq = "select * from subject where cuo=1 and [user]=?";
            PreparedStatement st = null;
            st = db.getCoon().prepareStatement(sq);
            st.setString(1, user);
            ResultSet rs = st.executeQuery();
           while(rs.next())
           {
               x = (String)request.getParameter("result" + i++);
               out.print("<tr><td>" + rs.getString(2) + "</td><td>&nbsp;=&nbsp;</td>");
               if(rs.getString(3).equals(x))
               {
                   out.print("<td>" + x + "</td>");
                   %>
                   <td><img alt="正确" src="images/accept.png"></td>
                   </tr>
                   <%
                     String sql="delete from subject where question='" + rs.getString(2) + "'and [user]='" + user +"'";//生成一条sql语句
                  Statement stmt = db.getCoon().createStatement();
                  stmt.execute(sql);
               }
               else 
               {
                   out.print("<td>" + x + "</td>");
                   %>
                   <td><img alt="错误" src="images/gif-0130.gif">正确答案为<%=rs.getString(3) %></td>
                   </tr>
                   <%
                   String geng = "update subject set my=? where [user]=? and question='" + rs.getString(2) +"'";
                   st = db.getCoon().prepareStatement(geng);
                   st.setString(1, x);
                   st.setString(2, user);
                   st.executeUpdate();
               }
        }
     %>
    </table>
    <div align="center">
        <a href="first.jsp">返回出题界面</a>
    </div>
</body>
</html>

运行结果截图

 

编程总结及体会

在合作过程中出现过各种问题，也为一个问题讨论过，也为了一些目标奋斗过，挺愉快的一次合作，虽然对合作还不是很熟悉，但我还是会努力学习和他人合作的。

学习了各种新的知识，并运用，熟悉着每一个知识点，很是开心。

编程中总会想着为程序添加各种功能，每个功能都需要大量的思考和测试，但收获很多。继续努力吧！