设计思想
使用随机数生成第一位和第二位的数和计算符号。之后先计算结果，如果结果在100范围以内则输出算式，否则重新生成算式。直到有效数量到达要求的数量为止。
源程序代码
package com.kao.msg.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import com.kao.msg.Util.DBUtil;
import com.kao.msg.model.Suanshi;
public class JisuanDao implements IYunsuan {
//@Override
static int[] id=new int[100];
static int shu=0;
public void add(Suanshi suanshi) {
Connection connection = DBUtil.getConnection();
String sql ;
PreparedStatement preparedStatement = null;
ResultSet resultSet = null;
sql = "insert into t_sizeyunsuan(firstnum,operator,secondnum,result) values (?,?,?,?)";
try {
preparedStatement = connection.prepareStatement(sql);
String str="";
preparedStatement.setInt(1, suanshi.getFirstnum());
preparedStatement.setString(2, str+suanshi.getOperator());
preparedStatement.setInt(3, suanshi.getSecondnum());
preparedStatement.setInt(4, suanshi.getResult());
preparedStatement.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
//关闭资源
DBUtil.close(resultSet);
DBUtil.close(preparedStatement);
DBUtil.close(connection);
}
}
@Override
public Suanshi load(int id) {
// TODO Auto-generated method stub
Connection connection = DBUtil.getConnection();
String sql = "select * from t_sizeyunsuan where id = ?";
PreparedStatement preparedStatement = null;
ResultSet resultSet = null;
Suanshi suanshi=null;
try {
preparedStatement = connection.prepareStatement(sql);
preparedStatement.setInt(1, id);
resultSet = preparedStatement.executeQuery();
while(resultSet.next()){
String str="";
suanshi=new Suanshi();
suanshi.setFirstnum(resultSet.getInt("firstnum"));
suanshi.setOperator(resultSet.getString("operator").charAt(0));
suanshi.setSecondnum(resultSet.getInt("secondnum"));
suanshi.setResult(resultSet.getInt("result"));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
DBUtil.close(resultSet);
DBUtil.close(preparedStatement);
DBUtil.close(connection);
}
return suanshi;
}
public List<Suanshi> load1(int n) {
//集合中只能放入user对象
shu=n;
List<Suanshi> suanshis = new ArrayList<Suanshi>();
Suanshi suanshi = null;
JisuanDao jisuandao=new JisuanDao();
int i=0;
int[] a=new int [1000000];
while(i<n){
suanshi=new Suanshi();
Random ran=new Random();
int id=ran.nextInt(1000);
int j=0;
for(j=0;j<i;j++){
if(a[j]!=id)
continue;
else
id=ran.nextInt(1000);
}
if(j==i){
a[i]=id;
}
this.id[i]=a[i];
suanshi=jisuandao.load(a[i]);
suanshis.add(suanshi);
i+=1;
}
return suanshis;
}
public int[] show(){
int[] num=new int[shu];
for(int i=0;i<shu;i++){
num[i]=id[i];
}
return num;
}
public void adderr(Suanshi suanshi) {
Connection connection = DBUtil.getConnection();
String sql ;
PreparedStatement preparedStatement = null;
ResultSet resultSet = null;
sql = "insert into t_error(firstnum,operator,secondnum,result) values (?,?,?,?)";
try {
preparedStatement = connection.prepareStatement(sql);
String str="";
preparedStatement.setInt(1, suanshi.getFirstnum());
preparedStatement.setString(2, str+suanshi.getOperator());
preparedStatement.setInt(3, suanshi.getSecondnum());
preparedStatement.setInt(4, suanshi.getResult());
preparedStatement.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
//关闭资源
DBUtil.close(resultSet);
DBUtil.close(preparedStatement);
DBUtil.close(connection);
}
}
public List<Suanshi> loaderror() {
// TODO Auto-generated method stub
Connection connection = DBUtil.getConnection();
//准备sql语句
String sql = "select * from t_error ";
//创建语句传输对象
PreparedStatement preparedStatement = null;
ResultSet resultSet = null;
//集合中只能放入user对象
List<Suanshi> suanshis = new ArrayList<Suanshi>();
Suanshi suanshi = null;
try {
preparedStatement = connection.prepareStatement(sql);
resultSet = preparedStatement.executeQuery();
while(resultSet.next()) {
suanshi = new Suanshi();
suanshi.setFirstnum(resultSet.getInt("firstnum"));
suanshi.setSecondnum(resultSet.getInt("secondnum"));
suanshi.setOperator(resultSet.getString("operator").charAt(0));
suanshi.setResult(resultSet.getInt("result"));
suanshis.add(suanshi);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
DBUtil.close(resultSet);
DBUtil.close(preparedStatement);
DBUtil.close(connection);
}
return suanshis;
}
}
package com.kao.msg.model;
public class Suanshi {
private int id;
private int firstnum;
private char operator;
private int secondnum;
private int result;
private int useresult;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getFirstnum() {
return firstnum;
}
public void setFirstnum(int firstnum) {
this.firstnum = firstnum;
}
public char getOperator() {
return operator;
}
public void setOperator(char operator) {
this.operator = operator;
}
public int getSecondnum() {
return secondnum;
}
public void setSecondnum(int secondnum) {
this.secondnum = secondnum;
}
public int getResult() {
return result;
}
public void setResult(int result) {
this.result = result;
}
public int getUseresult() {
return useresult;
}
public void setUseresult(int useresult) {
this.useresult = useresult;
}
}
<%@ 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="D:\娱乐\电影\1.jpg">
<div align="center">
<form action="Jisuan.jsp" method="get">
<table align="center" border="1" width="400">
<tr>
<td align="center">请输入题目数量</td>
<td align="center">
<input type="text" name="num" />
</td>
</tr>
<tr>
<td align="center">请输入时间</td>
<td align="center">
<input type="text" name="time" />
</td>
</tr>
<tr align="center">
<td colspan="2">
<input type="submit" value="确定" />
</td>
</tr>
</table>
<a href="showerror.jsp">查看历史错题</a>
</div>
</form>
</body>
</html>
<%@page import="com.kao.msg.model.Suanshi"%>
<%@page import="java.util.Scanner"%>
<%@page import="java.util.Random"%>
<%@page import="java.util.List"%>
<%@page import="com.kao.msg.dao.JisuanDao"%>
<%@ 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>出题</title>
</head>
<body background="D:\娱乐\电影\1.jpg">
<%
String num = request.getParameter("num");
int usenum=Integer.parseInt(num);
int time= Integer.parseInt(request.getParameter("time"));
%>
<%
JisuanDao jisuandao=new JisuanDao();
List<Suanshi> suanshis= jisuandao.load1(usenum);
%>
<script type='text/javascript'>
var num=<%=time%>;
function calc(){
if(num>0){
num--;
document.getElementById('second').innerHTML=num;
}else{
document.forms[0].submit();
}
setTimeout('calc()',1000);
}
</script>
<body onload="calc()">
<div id='second'>5</div>
</body>
<div align="center">
<form action="tongji2.jsp" method="get">
<%
int i=1;
for( Suanshi suanshi : suanshis ){
%>
<%
out.print("第"+i+"题");
%>
<%=suanshi.getFirstnum() %>
<%=suanshi.getOperator() %>
<%=suanshi.getSecondnum() %>
<%
%>
=<input type="text" name="result" />
<%
%>
</br>
</br>
<%
i+=1;
}
%>
<head>
<%
%>
<input type="submit" value="提交"/><br>
</form>
</div>
</body>
</html>
运行结果截图
时间记录日志
|
Personal Software Process Stages |
Time |
|
计划 |
|
|
· 估计这个任务需要多少时间 |
3个小时 |
|
开发 |
|
|
· 需求分析 (包括学习新技术) |
10分钟 |
|
· 生成设计文档 |
10分钟 |
|
· 设计复审 (和同事审核设计文档) |
无 |
|
· 代码规范 (为目前的开发制定合适的规范) |
10分钟 |
|
· 具体设计 |
10分钟 |
|
· 具体编码 |
1小时 |
|
· 代码复审 |
30分钟 |
|
· 测试（自我测试，修改代码，提交修改） |
2小时 |
|
报告 |
|
|
· 测试报告 |
无 |
|
· 计算工作量 |
无 |
|
· 事后总结, 并提出过程改进计划 |
1小时 |
|
合计 |
5小时10分钟 |
测试用例
（1）测试1个题目
（2）测试10个题目
（3）测试100个题目
（4）测试1000个题目
（5）测试10000个题目
（6）测试100000个题目
为的是测试出题上限是多少。
（7）不输入直接点提交测试
（8）输入负数测试
（9）输入字符串
（10）输入特殊字符
正确性
用户输入任何都不会导致报错，有足够健壮性
来源：https://www.cnblogs.com/wys-373/p/7992211.html