程序设计思想：
先用jsp做出基本的页面，输出答案时，将其传给第三个页面
程序源代码：
<%@ 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>首页</title>
</head>
<form name="form1" method="post"action="input.jsp">
<center>小学生的四则运算</center>
<table align="center">
<tr>
<td> 请输入要出题的题目数量： </td>
<td> <input name="shuliang" type="text" id="shuliang"maxlength="5"></td>
</tr>
<tr>
<td>
请输入要出题范围（1~？）：
</td>
<td>
<input name="fanwei" type="text" id="fanwei"maxlength="5">
</td>
</tr>
<tr>
<td>请选择计算的类型：
</td>
<td>
<select name="leixing">
<option value=0>简单运算</option>
<option value=1>混合运算</option>
</select>
</td>
</tr>
</table>
<center><input type="submit"value="开始答题"></center>
</form>
</body>
</html>
index.jsp
<%@ 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>Insert title here</title>
</head>
<body background="image/beijing2.jpg">
<%
String leixing=request.getParameter("leixing");
if(Integer.parseInt(leixing)==0)
{
%>
<%
int answer; //题目的答案
String j=request.getParameter("shuliang");//运算式的数量
int shuliang= Integer.valueOf(j);
String[] str=new String[shuliang];//用于连接输出字符
String[] daan=new String[shuliang];//输入的答案
String[] answer1=new String[shuliang]; //正确答案
String j1=request.getParameter("fanwei");//数值范围
int fanwei=Integer.valueOf(j1);
for(int i=0;i<shuliang;i++)
{
daan[i]="name"+i;
//生成0-100之间的随机数
int num1=(int)(Math.random()*fanwei+1);
int num2=(int)(Math.random()*fanwei+1);
int fuhao= (int)(Math.random()*4);
if(fuhao==0)
{
str[i]=num1+"+"+num2+"=";
answer=num1+num2;
}
else if(fuhao==1)
{
str[i]=num1+"-"+num2+"=";
answer=num1-num2;
}
else if(fuhao==2)
{
str[i]=num1+"*"+num2+"=";
answer=num1*num2;
}
else
{
str[i]=num1+"/"+num2+"=";
answer=num1/num2;
}
answer1[i]=""+answer;
out.print(str[i]);
%>
<br>
<form name="form2"method="post"action="daan.jsp">
请输入你的答案：<input name="<%=daan[i] %>" type="text" id="daan"maxlength="5">
<br>
<%
}
%>
<%
session.setAttribute("v1",str);
session.setAttribute("v2",answer1);
%>
<input type="submit"value="确定">
</form>
<%
}
%>
<%
if(Integer.parseInt(leixing)==1)
{
int answer; //题目的答案
String j=request.getParameter("shuliang");//运算式的数量
int shuliang= Integer.valueOf(j);
String[] str=new String[shuliang];//用于连接输出字符
String[] daan=new String[shuliang];//输入的答案
String[] answer1=new String[shuliang]; //正确答案
String j1=request.getParameter("fanwei");//数值范围
int fanwei=Integer.valueOf(j1);
for(int i=0;i<shuliang;i++)
{
daan[i]="name"+i;
str[i]=""+(int)((Math.random()*fanwei)+1); //随机产生第一个数
int num=(int)(Math.random()*3+2);
int jisuan[]=new int[num+1];//用于保存中间结果
jisuan[0]=Integer.parseInt(str[i]);
char yunsuanfu[]=new char[num+1];
for(int l=1;l<num;l++)
{
int fuhao= (int)(Math.random()*4);//随机产生符号
int num2=(int)(Math.random()*fanwei+1);
jisuan[l]=num2;
if(fuhao==0)
{
str[i]+="+"+num2;
yunsuanfu[l]='+';
}
if(fuhao==1)
{
str[i]+="-"+num2;
yunsuanfu[l]='-';
}
if(fuhao==2)
{
str[i]+="*"+num2;
yunsuanfu[l]='*';
}
if(fuhao==3)
{
str[i]+="/"+num2;
yunsuanfu[l]='/';
}
}
out.print(str[i]+"<br>");
for(int l=1;l<num;l++)
{
if(yunsuanfu[l]=='*')
{
jisuan[l]=jisuan[l-1]*jisuan[l];
jisuan[l-1]=0;
yunsuanfu[l]=yunsuanfu[l-1];
}
else if(yunsuanfu[l]=='/')
{
jisuan[l]=jisuan[l-1]/jisuan[l];
jisuan[l]=0;
yunsuanfu[l]=yunsuanfu[l-1];
}
}
for(int l=1;l<num;l++)
{
if(yunsuanfu[l]=='+')
{
jisuan[l]=jisuan[l-1]+jisuan[l];
jisuan[l-1]=0;
}
else if(yunsuanfu[l]=='-')
{
jisuan[l]=jisuan[l-1]-jisuan[l];
jisuan[l-1]=0;
}
}
answer1[i]=""+jisuan[num-1];
%>
<br>
<form name="form2"method="post"action="Result.jsp">
请输入你的答案：<input name="<%=daan[i] %>" type="text" id="daan"maxlength="5">
<br>
<%
}
%>
<%
session.setAttribute("v1",str);
session.setAttribute("v2",answer1);
%>
<input type="submit"value="确定">
</form>
<%
}
%>
<table>
</table>
</body>
</html>
<%@ 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>结果</title>
</head>
<body background="image/beijing3.jpg">
<%
String[] s= (String[])session.getAttribute("v1");
String[] answer= (String[])session.getAttribute("v2");
String[] daan=new String[s.length];
int count=0;//正确答案的个数
for(int i=0;i<s.length;i++)
{
out.print("运算式为：");
out.print(s[i]+" ");
out.print("您的输入结果为：");
daan[i]=request.getParameter("name"+i);
out.print(daan[i]+" ");
out.print("正确结果为：");
out.print(answer[i]);
if(Integer.parseInt(daan[i])==Integer.parseInt(answer[i]))
{
out.print("恭喜你答对了！");
count++;
}
else
{
out.print("很遗憾，你打错了！");
}
out.print("<br>");
}
out.print("你一共答对的题目数：");
out.print(count);
%>
</body>
</html>
程序截图：
总结：由于时间问题，对于一些功能没有实现，还需努力
