四则运算2

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