代码（1）：
<%@ 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=ISO-8859-1">
<title>四则运算</title>
</head>
<body>
<h1>四则运算</h1>
<form action="yunsuan.jsp" method="post">
出题页数：<input type="text" name = "shuliang"><br>
<h2>1.整数运算 2.真分数运算</h2>
题目样式<input type="text" name="choose"><br>
<input type="submit" value="提交">
</form>
</body>
</html>
代码（2）：
<%@ 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>
<%
JspWriter mout=pageContext.getOut();
String zh = request.getParameter("shuliang");
String zhh = request.getParameter("choose");
int x=Integer.parseInt(zh);
int y=Integer.parseInt(zhh);
int m,n,j;
char []ch=new char[4];
ch[0]='+';
ch[1]='-';
ch[2]='*';
ch[3]='/';
if(y==1)
{
for(int ii=1;ii<=x;ii++)
{
mout.print("30道题目");
mout.print("<br>");
String []A=new String[30];
for(int i=0;i<30;i++)
{
m=(int)(Math.random()*10+1);
n=(int)(Math.random()*10+1);
j=(int)(Math.random()*4+1);
A[i]=m+" "+ch[j-1]+" "+n+"=";
for(int k=i+1;k<30;k++)
{
if(A[i].equals(A[k]))
{
m=(int)(Math.random()*10+1);
n=(int)(Math.random()*10+1);
j=(int)(Math.random()*4+1);
A[k]=m+" "+ch[j-1]+" "+n+"=";
k--;
}
}
mout.print((i+1)+". "+A[i]);
mout.print("<br>");
}
mout.print("-"+ii+"-");
mout.print("<br><br><br>");
}
}
if(y==2)
{
for(int ii=1;ii<=x;ii++)
{
int a,b,c,d;
String aa,bb;
mout.print("30道题目");
mout.print("<br>");
String []B=new String[30];
for(int i=0;i<30;i++)
{
a=(int)(Math.random()*100+1);
b=(int)(Math.random()*100+1);
if(a>b)
aa=b+"/"+a;
else if(a<b)
aa=a+"/"+b;
else
aa="1";
c=(int)(Math.random()*100+1);
d=(int)(Math.random()*100+1);
if(c>d)
bb=d+"/"+c;
else if(c<d)
bb=c+"/"+d;
else
bb="1";
j=(int)(Math.random()*4+1);
B[i]=aa+" "+ch[j-1]+" "+bb+"=";
for(int k=i+1;k<30;k++)
{
if(B[i].equals(B[k]))
{
m=(int)(Math.random()*10+1);
n=(int)(Math.random()*10+1);
j=(int)(Math.random()*4+1);
B[k]=aa+" "+ch[j-1]+" "+bb+"=";
k--;
}
}
mout.print((i+1)+". "+B[i]);
mout.print("<br>");
}
mout.print("-"+ii+"-");
mout.print("<br><br><br>");
}
}
%>
</body>
</html>
结果截图：
