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  • 软件工程结对作业01

    结对开发团队成员:赵子鸣、周宝辉

    设计思想:

    程序中涉及了简单的mvc框架中的jsp+javabean结构,将整数和分数式子的类写到srcentity的包中,将一些关于数据库的操作写到sql包中;jsp有三个,第一个是选择界面(选择一些简单的参数,例如整数或者分数,出题数据范围,算式运算符个数,式子个数等等),将这些参数传到第二个jsp中,在第二个jsp得到用户输入的参数,并且生成相应的算式题目,在第三个jsp中判断对错,在jsp中调用包中的类,直接使用.java中的分数整数类,在一些数据库操作中也是直接调用封装好的sql包中函数,来实现连接数据库,插入数据等操作。

    其中,对于算式的计算是用递归实现的,比如3个数计算,可以先算一步,变成2个数的算式,由此可以递归来实现算式的结果。

    源程序代码:

    entity包

    Fenshu.java

    package entity;
    
    public class Fenshu {
        int a;
        int b;
        
        public static Fenshu jisuanjieguo(Fenshu a[],int b[],int n){
            Fenshu jie=new Fenshu();
            if(n==1){jie=jisuan(a[0],b[0],a[1]);}
            else {
                int ii=0;boolean z=false;
                for(int i=0;i<n;i++){
                    if(b[i]==3||b[i]==4){
                        ii=i;
                        z=true;
                        break;
                    }
                }
                if(z==true){
                    a[ii]=jisuan(a[ii],b[ii],a[ii+1]);
                    if(ii!=n-1){
                        for(int i=ii;i<n-1;i++){
                            b[i]=b[i+1];
                            a[i+1]=a[i+2];
                        }
                    }
                    jie=jisuanjieguo(a,b,n-1);
                }
                else {
                    a[0]=jisuan(a[0],b[0],a[1]);
                    for(int i=0;i<n-1;i++){
                        b[i]=b[i+1];
                        a[i+1]=a[i+2];
                    }
                    jie=jisuanjieguo(a,b,n-1);
                }
            }
            return jie;
        }
        public static Fenshu jisuan(Fenshu aaa,int bbb,Fenshu ccc){
            Fenshu d=new Fenshu();
            int a1=1,b1=1;
            if(bbb==1){
                b1=aaa.b*ccc.b;
                a1=aaa.a*ccc.b+aaa.b*ccc.a;
            }
            else if(bbb==2){
                b1=aaa.b*ccc.b;
                a1=aaa.a*ccc.b-aaa.b*ccc.a;
            }
            else if(bbb==3){
                b1=aaa.b*ccc.b;
                a1=aaa.a*ccc.a;
            }
            else {
                b1=aaa.b*ccc.a;
                a1=aaa.a*ccc.b;
            }
            d.set(a1,b1);
            d.yue();
            return d;
        }
        public void set(int aa,int bb){
            a=aa;
            b=bb;
        }
        public int zuidayin(){
            int c=0,d=1;
            if(a<b) c=a;
            else c=b;
            for(int i=1;i<=c;i++){
                if(a%i==0&&b%i==0){
                    d=i;
                }
            }
            return d;
        }
        public void yue(){
            int y=this.zuidayin();
            if(y!=1){
                a=a/y;
                b=b/y;
            }
        }
        public String dai(){
            String p="";
            if(a>=b){
                int q=a/b;
                int w=a-b*q;
                return p+q+"'"+w+"/"+b;
            }
            else {
                return p+a+"/"+b;
            }
        }
        public String fanhui(){
            String r="";
            r="("+a+"/"+b+")";
            return r;
        }
    }

    Fenshude.java

    package entity;
    
    public class Fenshude {
        Fenshu as[];
        int fu[];
        int fanwei;
        int shu;
        public void getshu(int n){
            shu=n;
            as=new Fenshu [n+1];
            fu=new int [n];
        }
        public void getfanwei(int a){
            fanwei=a;
        }
        public void shengcheng(int pp){
            for(int i=0;i<shu;i++){
                if(pp==1)
                    fu[i]=(int)(Math.random()*4+1);
                else 
                    fu[i]=(int)(Math.random()*2+1);
            }
            for(int i=0;i<shu+1;i++){
                int ii=0;
                as[i]=new Fenshu();
                while(ii==0){
                    as[i].b=(int)(Math.random()*(fanwei-1)+1);
                    as[i].a=(int)(Math.random()*(fanwei-1)+1);
                    if(as[i].a<as[i].b){ii=1;}
                }
            }
        }
        public String zhuan(int a){
            if(a==1) return "+";
            else if(a==2) return "-";
            else if(a==3)return "*";
            else return "/";
        }
        public String show(){
            String uuu="";
            for(int i=0;i<shu;i++){
                uuu="("+as[i].a+"/"+as[i].b+") "+zhuan(fu[i]);
                System.out.print("("+as[i].a+"/"+as[i].b+") "+zhuan(fu[i])+" ");
            }
            uuu=uuu+"("+as[shu].a+"/"+as[shu].b+")";
            System.out.print("("+as[shu].a+"/"+as[shu].b+")");
            System.out.println(" =");
            return uuu;
        }
    
        public Fenshu jieguo(){
            Fenshu jieguo=new Fenshu();
            jieguo=Fenshu.jisuanjieguo(as,fu,shu);
            return jieguo;
        }
        public Fenshu showjieguo(){
            Fenshu ee=jieguo();
            System.out.println("   结果为:"+ee.a+"/"+ee.b);
            return ee;
        }
        public String showshizi(){
            String r="";
            for(int i=0;i<shu;i++){
                r=r+as[i].fanhui()+zhuan(fu[i]);
            }
            r=r+as[shu].fanhui();
            return r;
        }
        public String showdaan(){
            String r="";
            Fenshu ee=jieguo();
            r=r+ee.a+"/"+ee.b;
            if(ee.b==1)
                r=""+ee.a;
            return r;
        }
        
    }

    Panduan.java

    package entity;
    
    public class Panduan{
        
        public static int panduan1(String b)
        {
            if(b.equals("2"))
                return 2;
            else if(b.equals("3"))
                return 3;
            else if(b.equals("4"))
                return 4;
            else if(b.equals("5"))
                return 5;
            else
                return 0;
        }
        public static int panduan2(String b)
        {
            if(b.equals("10"))
                return 10;
            else if(b.equals("50"))
                return 50;
            else if(b.equals("100"))
                return 100;
            else 
                return 0;
        }
        public static void main(String[]arg)
        {
            String a="2";
            int m=panduan1(a);
            System.out.println(m);
            int n=panduan2("10");
            System.out.println(n);
        }
    
    }

    Suan.java

    package entity;
    
    public class Suan {
        int fanwei;
        int shu;
        int zheng[];
        int fu[];
        public void getshu(int n){
            shu=n;
            zheng=new int [n+1];
            fu=new int [n];
        }
        public void getfanwei(int a){
            fanwei=a;
        }
        public void shengcheng(int pp){
            for(int i=0;i<shu;i++){
                if(pp==1)
                    fu[i]=(int)(Math.random()*4+1);
                else 
                    fu[i]=(int)(Math.random()*2+1);
            }
            for(int i=0;i<shu+1;i++){
                zheng[i]=(int)(Math.random()*(fanwei-1)+1);
            }
            for(int i=0;i<shu;i++){
                int aa=1;
                while(aa==1){
                    if(fu[i]==2){
                        if(zheng[i]>=zheng[i+1]){
                            aa=0;
                        }
                        else{
                            zheng[i]=(int)(Math.random()*(fanwei-1)+1);
                            zheng[i+1]=(int)(Math.random()*(fanwei-1)+1);
                        }
                    }
                    else if(fu[i]==4){
                        if(zheng[i]<zheng[i+1]){
                            aa=0;
                        }
                        else{
                            zheng[i]=(int)(Math.random()*(fanwei-1)+1);
                            zheng[i+1]=(int)(Math.random()*(fanwei-1)+1);
                        }
                    }
                    else{
                        aa=0;
                    }
                }
            }
        }
        public String zhuan(int a){
            if(a==1) return "+";
            else if(a==2) return "-";
            else if(a==3)return "*";
            else return "/";
        }
        public String show(){
            String uuu="";
            for(int i=0;i<shu;i++){
                uuu=uuu+zheng[i]+zhuan(fu[i]);
                System.out.print(zheng[i]+" "+zhuan(fu[i])+" ");
            }
            uuu=uuu+zheng[shu];
            System.out.print(zheng[shu]);
            System.out.println(" =");
            return uuu;
        }
    
        public Fenshu jieguo(){
            Fenshu qq[]=new Fenshu[shu+1];
            for(int i=0;i<shu+1;i++){
                qq[i]=new Fenshu();
                qq[i].set(zheng[i],1);
            }
            Fenshu jieguo=new Fenshu();
            jieguo=Fenshu.jisuanjieguo(qq,fu,shu);
            return jieguo;
        }
        public Fenshu showjieguo(){
            Fenshu ee=jieguo();
            System.out.println("   结果为:"+ee.a+"/"+ee.b);
            return ee;
        }
        public String showdaan(){
            String r="";
            Fenshu ee=jieguo();
            r=r+ee.a+"/"+ee.b;
            if(ee.b==1)
                r=""+ee.a;
            return r;
        }
        public String showshizi(){
            String r="";
            for(int i=0;i<shu;i++){
                r=r+zheng[i]+zhuan(fu[i]);
            }
            r=r+zheng[shu];
            return r;
        }
        public String fanhui(){
            String aq="";
            for(int i=0;i<shu;i++){
                aq=aq+""+zheng[i]+zhuan(fu[i]);
            }
            aq=aq+zheng[shu];
            return aq;
        }
    }

    sql包

    Sql.java

    package sql;
    
    import java.sql.*;
    
    public class Sql {
        static Connection con=null;
        static Statement stmt=null;
        static PreparedStatement psmt=null;
        public static Statement get(){
            return stmt;
        }
        public static void lianjie(){
            try{
                Class.forName("com.mysql.jdbc.Driver");
                con=DriverManager.getConnection("jdbc:mysql://127.0.0.1/web_number","root","baohui");
                stmt=con.createStatement();
                System.out.print("数据库连接成功");
                //out.print("<p>");
            }
            catch(Exception e)
            {
                System.out.print(e);
            }
            
        }
        public static void insert (int a,String b,String c)throws Exception{
            
            try
            {
                String sql2="insert into web (number,shizi,jieguo) values (?,?,?)";
                psmt=con.prepareStatement(sql2);
                psmt.setInt(1,a);
                psmt.setString(2,b);
                psmt.setString(3,c);
                psmt.executeUpdate();
                //out.print("插入成功!");    
            }
            catch(Exception e)
            {
                 //out.print(e);
            }
            
        }
        public static void delete()throws Exception{
            String sql1="delete from web";
            stmt.execute(sql1);
        }
        public static void guan()throws Exception{
            psmt.close();
            stmt.close();
            con.close();
        }
        public static void main(String arg[]){
            lianjie();
        }
        
    }

    jsp

    index.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    <%@page import="entity.*"%>
    <%@page import="sql.*"%>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <base href="<%=basePath%>">
        
        <title>出题</title>
        <meta http-equiv="pragma" content="no-cache">
        <meta http-equiv="cache-control" content="no-cache">
        <meta http-equiv="expires" content="0">    
        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
        <meta http-equiv="description" content="This is my page">
        <!--
        <link rel="stylesheet" type="text/css" href="styles.css">
        -->
      </head>
      
      <body>
        <form id=form1 method="post" action="judge.jsp" >
        <% 
        request.setCharacterEncoding("utf-8");
          String operator=request.getParameter("operator");
          String operator1=request.getParameter("operator1");
          String number1=request.getParameter("number1");
          String number2=request.getParameter("number2");
      
        int a=Panduan.panduan1(number1);
          int b=Panduan.panduan2(number2);
          
          int c=2;
          if(operator.equals("是"))
          {
              c=1;
          }
          
          if(operator1.equals("整数"))
          {
              Suan xx[]=new Suan[10];
            int wei=b;
            int shu=a;
            
            String pp="";
            String pp1="";
            Sql.lianjie();
            Sql.delete();
            for(int i=0;i<10;i++){
                xx[i]=new Suan();
                xx[i].getfanwei(wei);
                xx[i].getshu(shu);
                xx[i].shengcheng(c);
                pp=xx[i].show();
                pp1=xx[i].showjieguo().dai();
                out.print(xx[i].showshizi()+"=  ");
                //out.print(xx[i].showdaan());
                out.print("<input type=text id=text1 name=name"+i+">");
                out.print("<p>");
                Sql.insert(i+1,xx[i].showshizi(),xx[i].showdaan());
            }
            Sql.guan();
          }
          
          else
          {
              request.setCharacterEncoding("utf-8");
              Fenshude xx[]=new Fenshude[10];
            int wei=b;
            int shu=a;
            
            String pp="";
            String pp1="";
            Sql.lianjie();
            Sql.delete();
            for(int i=0;i<10;i++){
                xx[i]=new Fenshude();
                xx[i].getfanwei(wei);
                xx[i].getshu(shu);
                xx[i].shengcheng(c);
                //pp=xx[i].show();
                //pp1=xx[i].showjieguo().dai();
                out.print(xx[i].showshizi()+"=  ");
                //out.print(xx[i].showdaan());
                out.print("<input type=text id=text1 name=name"+i+">");
                out.print("<p>");
                Sql.insert(i+1,xx[i].showshizi(),xx[i].showdaan());
            }
            Sql.guan();
          
          }
          //out.print(a+"<p>");
          //out.print(b+"<p>");
          
        %>
       <input type=submit name=submit value=提交 >
       </form>
      </body>
    </html>

    judge.jsp

    <%@ page language="java" import="java.util.*" import ="java.sql.*" pageEncoding="utf-8"%>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    <%@page import="entity.*"%>
    <%@page import="sql.*"%>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <base href="<%=basePath%>">
        
        <title>判断答案</title>
        
        <meta http-equiv="pragma" content="no-cache">
        <meta http-equiv="cache-control" content="no-cache">
        <meta http-equiv="expires" content="0">    
        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
        <meta http-equiv="description" content="This is my page">
        <!--
        <link rel="stylesheet" type="text/css" href="styles.css">
        -->
    
      </head>
      
      <body>
        <%
        request.setCharacterEncoding("utf-8");
            Statement stmt=null;
            Connection con=null;
            try{
                Class.forName("com.mysql.jdbc.Driver");
                con=DriverManager.getConnection("jdbc:mysql://127.0.0.1/web_number","root","baohui");
                stmt=con.createStatement();
                //out.print("数据库连接成功");
                //out.print("<p>");
            }
            catch(Exception e)
            {
                out.print(e);
            }
        
        //Sql.lianjie();
        String sql="select * from web";
        ResultSet rs=stmt.executeQuery(sql);
            for(int i=0;i<10;i++)
            {
                //sql语句执行
                int number=0;
                String shizi=null;
                String jieguo=null;
                if(rs.next())
                {
                    number=rs.getInt("number");
                    shizi=rs.getString("shizi");
                    jieguo=rs.getString("jieguo");
                }
                
                //进行比较,判断对错
                out.print(shizi+"=    ");
                String  name=request.getParameter("name"+i);
                out.print(name);
                String name1=jieguo;
                
                if(name.equals(name1))
                {
                    out.print("        ");
                    out.print("<font color=greeen face=楷体>正确</font>");
                }
                else
                {
                    out.print("        ");
                    out.print("<font color=red face=楷体>错误</font>");
                }
                out.print("<p>");
            }
            stmt.close();
            con.close();
         %>
      </body>
    </html>

    select.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <base href="<%=basePath%>">
        
        <title>选择参数</title>
        
        <meta http-equiv="pragma" content="no-cache">
        <meta http-equiv="cache-control" content="no-cache">
        <meta http-equiv="expires" content="0">    
        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
        <meta http-equiv="description" content="This is my page">
        <!--
        <link rel="stylesheet" type="text/css" href="styles.css">
        -->
    
      </head>
      
      <body>
        <form id=form2 method=post action="index.jsp">
        <table align=center border=0>
        <tr>
            <td>是否需要乘除:<td>
            <td>是 <input type=radio name=operator value="是" checked><input type=radio name=operator value="否"></td>
        </tr>
        <tr>
            <td>选择整数还是分数:<td>
            <td>整数<input type=radio name=operator1 value="整数" checked>
                   分数<input type=radio name=operator1 value="分数"></td>
        </tr>
        <tr>
            <td>运算符的个数:<td>
            <td><select name=number1 size=1>
                    <option>2</option>
                    <option>3</option>
                    <option>4</option>
                    <option>5</option>
                </select>
            </td>
        </tr>
        <tr>
            <td>请选择运算范围:<td>
            <td>
                <select name=number2 size=1>
                    <option>10</option>
                    <option>50</option>
                    <option>100</option>
                </select>
            </td>
        </tr>
        <tr>
        <td><input type=submit name=submit value=下一步 ></td>
        </tr>
        </table>
        </form>  
        </body>
    </html>

    运行结果截图:

    总结体会:

    首先,由于题目要求比较多,所以在编程之前的设计思路是非常重要的,将需要封装的封装为类,相应的一些功能函数应当写成函数以便后面可以灵活的调用;计算结果的过程利用的是递归的方法,此处是把握了每次计算的规律,找到相似的地方,在递归函数的实现上,起初总是没结果,后来发现没有传递回来值,所以递归中返回值也是很重要的;在数据库的连接时,需要注意jdbc.jar文件的配置,否则数据库会驱动失败(比较容易遗漏);在jsp中使用循环结构生成式子的时候,因为要留出答题的文本框,所以在循环需要注意每输出一个式子,相应的输出一个文本框,这里主要答题方便,使界面更具有美观性,操作性;在jsp传递参数过程中涉及到类型转换,需要注意;用javabean来封装类使得思路比较清晰,结构框架清楚,把java代码实现的语句大部分写到.java文件中,而在.jsp文件中主要写传参以及界面的设计,使得思路更具有逻辑性。

    psp表

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  • 原文地址:https://www.cnblogs.com/zhaoziming/p/6677574.html
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