软件工程结对作业02

设计思想:

将原有的Java程序转化为网页版,可以设计一个html将用户的选择传递下去,在接下来的页面中使用request接收,然后设置几个数组分别传递算式、答案、用户的回答,使用session进行传递数组,在下一页中设置数组接收数据并用for循环和if语句就可以实现答案的校验。这样就三页就完成了。

代码:

new.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
   <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
   <meta name="keywords" content="keyword1,keyword2,keyword3">
   <meta name="description" content="this is my page">
   <title>首页</title>
 </head>
 <body>
    <center>
    <h1 align="center">四则运算</h1>
    <!-- 传递参数的值给index.jsp处理 -->
    <form action="index.jsp" method="post">
     <br>请输入范围:
     <input type ="text" name ="range"/>
     <br>
     <br>请输入题数:
     <input type ="text" name ="row"/>
     <br>
     <br>请选择功能:
     <select name="function">
    <option value=1>整数加减法</option>
    <option value=2>整数四则运算</option>
    <option value=5>多数的四则运算(带括号)</option> 
    </select>
     <br>
     <br>请选择子功能:
     <select name="subfunction">
    <option value=1>无负数</option>
    <option value=2>有负数</option>
    <option value=3>无余数</option>
    <option value=4>有余数</option>
    </select>
     <br>
     <input type="submit" name="submit" value="确定">
    </form>
    </center>
 </body>
</html>

index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8" 
    pageEncoding="utf-8"%>
<%@page import= "test.*" %>
<%@page import= "java.util.*" %>
<!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>四则运算</title>
</head>
<body>
    <center>
    <h1>四则运算</h1>
    <form action="answer.jsp"method="post">
    <%
    request.setCharacterEncoding("UTF-8");
    String f = request.getParameter("function");
    String subf = request.getParameter("subfunction");
    String ran =request.getParameter("range");
    String r=request.getParameter("row");
    Operate oper=new Operate();
    int h=Integer.parseInt(r);
    int g=Integer.parseInt(ran);
    String[] s1=new String[h];
    String[] se=new String[h];
    int[] answer=new int[h];
    Random random = new Random();
    char arr[] = {'+','-','*','/','('};
    for(int i=0;i<h;i++)
    {
        se[i]="se";
        se[i]=se[i]+i;
        if(f.equals("1")&&subf.equals("1"))
        {
            String str1=random.nextInt(g)+""+arr[random.nextInt(2)]+""+random.nextInt(g);
            s1[i]=str1;
            int t1 = oper.caculate(str1+'#');
            answer[i]=t1;
            out.println(str1+'=');
        }
        else if(f.equals("1")&&subf.equals("2"))
        {
            int c1=random.nextInt(g);
               int c2=random.nextInt(g);
               char w1=arr[random.nextInt(2)];
               if(c1>c2)
               {
                  c1=random.nextInt(g);
                  c2=random.nextInt(g);
               }
             String str1 = c1+""+w1+""+c2;
             s1[i]=str1;
                int t1 = oper.caculate(str1+'#');
                answer[i]=t1;
                out.println(str1+'=');
        }
        else if(f.equals("2")&&subf.equals("3"))
        {
            String str3;
            int u=random.nextInt(g);
            int v=random.nextInt(g)+1;
            char w=arr[random.nextInt(4)];
            if(u%v==0 && w=='/')
            {
                str3 =u+""+w+""+v;
            }
           else
               str3 =u-(u%v)+""+w+""+v;
            s1[i]=str3;
            int t1 = oper.caculate(str3+'#');
            answer[i]=t1;
            out.println(str3+'=');
        }
        else if(f.equals("2")&&subf.equals("4"))
        {
            int u=random.nextInt(g);
            int v=random.nextInt(g)+1;
            char w=arr[random.nextInt(4)];
            String str3 =u+""+w+""+v;
            s1[i]=str3;
            int t1 = oper.caculate(str3+'#');
            answer[i]=t1;
            out.println(str3+'=');
        }
        else
        {
            String str=new String();
            int n =random.nextInt(3)+1;
            Stack<Integer> S1 = new Stack<Integer>();
            Stack<Character> S2 = new Stack<Character>();
            for(int j=0;j<n+1;j++)
            {    
                char w=' ';
                
                int e= random.nextInt(g)+1;
                if( w=='/'&&e==0)
                {
                    e = random.nextInt(g)+1;
                }
                w = arr[random.nextInt(5)];
                S1.push(e);
                S2.push(w);
            }
            int k=0;
            for(int j=0;j<n;j++)
            {
                char m =  S2.pop();
                if(m=='(')
                {
                    if(j>n-2)
                        str =str+S1.pop()+""+arr[random.nextInt(4)];
                    else
                    {
                        str =str+S1.pop()+""+arr[random.nextInt(4)]+""+m;
                        k=k+1;
                    }
                }
                else
                    str =str+S1.pop()+""+ m;
            }
            if(k==0)
            {
                str =str+random.nextInt(g)+1;
            }
            else if(k==1)
                str=str+random.nextInt(g)+1+")";
            else if(k==2)
                str=str+random.nextInt(g)+1+"))";
            else if(k==3)
                str=str+random.nextInt(g)+1+")))";
            else
                str=str+random.nextInt(g)+1+"))))";
            s1[i]=str;
            int t1 = oper.caculate(str+'#');
            answer[i]=t1;
            out.println(str+'=');
        }
        %>
        <input type="text" name=<%=se[i] %>><br>
        <%
    }
    session.setAttribute( "v1",s1);
    session.setAttribute( "v2",answer); 
    %>
    <br><input type="submit" name="submit" value="提交">   
    <%
    %>
    </form>
    </center>
</body>
</html>

answer.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>校验</title>
 </head>
 <body>
    <center>
    <h1>四则运算</h1>
    <%
    request.setCharacterEncoding("UTF-8");
    String[]s1 = (String[])session.getAttribute("v1");
    int[] answer=(int[])session.getAttribute("v2");
    int h=s1.length;
    String[]se=new String[h];
    int counter=0;
    for(int i=0;i<h;i++)
    {
        se[i]="se";
        se[i]=se[i]+i;
        int a =Integer.parseInt(request.getParameter(se[i]));
        out.println(s1[i]+'=');
        out.println(a);
        out.println("<br>");
        if(answer[i]==a)
        {
            out.println("回答正确!");
            out.println("<br>");
            counter++;
        }
        else
        {
            out.println("答案错误!");
            out.println("正确答案为:"+answer[i]);
            out.println("<br>");
        }
        
    }
    out.println("<br>");
    out.println("您共答对了"+counter+"道题。");
    %>

  <br>
    <input type="button" value="返回首页" onClick="window.location.href='new.html'">
    <input type="button" value="关闭" onClick="window.close();">
    </center>
 </body>
</html>

operate.java

package test;

import java.util.Stack;

public class Operate {   
          private Stack<Character> priStack = new Stack<Character>();// 操作符栈   
          private Stack<Integer> numStack = new Stack<Integer>();;// 操作数栈   
            
          public  int caculate(String str) {   
            // 1.判断string当中有没有非法字符   
            String temp;// 用来临时存放读取的字符   
            // 2.循环开始解析字符串,当字符串解析完,且符号栈为空时,则计算完成   
            StringBuffer tempNum = new StringBuffer();// 用来临时存放数字字符串(当为多位数时)   
            StringBuffer string = new StringBuffer().append(str);// 用来保存,提高效率   
            
            while (string.length() != 0) {   
              temp = string.substring(0, 1);   
              string.delete(0, 1);   
              // 判断temp,当temp为操作符时   
              if (!isNum(temp)) {   
                // 1.此时的tempNum内即为需要操作的数,取出数,压栈,并且清空tempNum   
                if (!"".equals(tempNum.toString())) {   
                  // 当表达式的第一个符号为括号   
                  int num = Integer.parseInt(tempNum.toString());   
                  numStack.push(num); 
                  tempNum.delete(0, tempNum.length());   
                }   
                // 用当前取得的运算符与栈顶运算符比较优先级:若高于,则因为会先运算,放入栈顶;若等于,因为出现在后面,所以会后计算,所以栈顶元素出栈,取出操作数运算;   
                // 若小于,则同理,取出栈顶元素运算,将结果入操作数栈。   
            
                // 判断当前运算符与栈顶元素优先级,取出元素,进行计算(因为优先级可能小于栈顶元素,还小于第二个元素等等,需要用循环判断)   
                while (!compare(temp.charAt(0)) && (!priStack.empty())) {  
                  int a = (int) numStack.pop();// 第二个运算数   
                  int b = (int) numStack.pop();// 第一个运算数   
                  char ope = priStack.pop();   
                  int result = 0;// 运算结果   
                  switch (ope) {   
                  // 如果是加号或者减号,则   
                  case '+':   
                    result = b + a;   
                    // 将操作结果放入操作数栈   
                    numStack.push(result);   
                    break;   
                  case '-':   
                    result = b - a;   
                    // 将操作结果放入操作数栈   
                    numStack.push(result);   
                    break;   
                  case '*':   
                    result = b * a;   
                    // 将操作结果放入操作数栈   
                    numStack.push(result);   
                    break;   
                  case '/':   
                    result = b / a;// 将操作结果放入操作数栈   
                    numStack.push(result);   
                    break;   
                  }   
            
                }   
                // 判断当前运算符与栈顶元素优先级, 如果高,或者低于平,计算完后,将当前操作符号,放入操作符栈   
                if (temp.charAt(0) != '#') {   
                  priStack.push(new Character(temp.charAt(0)));   
                  if (temp.charAt(0) == ')') {// 当栈顶为'(',而当前元素为')'时,则是括号内以算完,去掉括号   
                    priStack.pop();   
                    priStack.pop();   
                  }   
                }   
              } else  
                // 当为非操作符时(数字)   
                tempNum = tempNum.append(temp);// 将读到的这一位数接到以读出的数后(当不是个位数的时候)   
            }   
            return numStack.pop();   
          }   
            
          private boolean isNum(String temp) {   
            return temp.matches("[0-9]");   
          }   
            
          /*  
           * 比较当前操作符与栈顶元素操作符优先级,如果比栈顶元素优先级高,则返回true,否则返回false  
           */  
          private boolean compare(char str) {   
            if (priStack.empty()) {   
              // 当为空时,显然 当前优先级最低,返回高   
              return true;   
            }   
            char last = (char) priStack.lastElement();   
            // 如果栈顶为'('显然,优先级最低,')'不可能为栈顶。   
            if (last == '(') {   
              return true;   
            }   
            switch (str) {   
            case '#':   
              return false;// 结束符   
            case '(':   
              // '('优先级最高,显然返回true   
              return true;   
            case ')':   
              // ')'优先级最低,   
              return false;   
            case '*': {   
              // '*/'优先级只比'+-'高   
              if (last == '+' || last == '-')   
                return true;   
              else  
                return false;   
            }   
            case '/': {   
              if (last == '+' || last == '-')   
                return true;   
              else  
                return false;   
            }   
              // '+-'为最低,一直返回false   
            case '+':   
              return false;   
            case '-':   
              return false;   
            }   
            return true;   
          }

    public static void main(String[] args) {
        // TODO Auto-generated method stub

    }

}

结果截图:

总结:

本次实验主要是对web网页开发相关技术的应用,再学习了数据的传输和网页跳转技术之后实现起来是会容易一些。

PSP记录日志:

预估表:

版块 主页 出题页 判断页
预估时间 20 180 120

实际用时:

日期 开始时间 结束时间 中断时间 净时间 活动
4/2 9:00 10:10   70 结对首页开发
4/3 16:10 18:40   150 将源代码与web结合(查资料)
4/4 14:20 16:50   150 编写web代码
4/6 15:40 17:00   100 编写web代码
           
           
           

 

posted @ 2016-04-09 19:59  mrferry  阅读(116)  评论(0编辑  收藏  举报