四、源代码

欢迎界面

1  2  3  4 <%@ page language="java" contentType="text/html; charset=UTF-8" 5     pageEncoding="UTF-8"%> 6 
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小学二年级算式计算
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本页仅供二年级的小同学测试使用,共60道100以内加减乘除算式计算题,计时8分钟。
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      按下此键开始14 
     
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题目展示界面

1 <%@page import="CC.GradeTwo" %> 2  3  4  5 <%@ page language="java" contentType="text/html; charset=UTF-8" 6     pageEncoding="UTF-8"%> 7 
      8 27 28 29 <%30      String str = null;31 %>32 33 34 <%35     request.setCharacterEncoding("utf-8");36 %>37 
     
      38    
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      44       
      
       45       
46           <%    GradeTwo.clear();47                 for(int i = 1;i<=60;++i)      {    48                     str = GradeTwo.getPoly();49 50       %>51       
52       <%53                 }54       %>55       
56       
       
        
         
共60题,注意用时
        
        
         
第<%=i %>题
         
<%=str %>
         
        
        
         
        
       
      
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结果展示界面

1  2  3  4 <%@page import="CC.GradeTwo" %> 5 <%@ page language="java" contentType="text/html; charset=UTF-8" 6     pageEncoding="UTF-8"%> 7 
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答题结果
12 <%13    int[]end = (int[])(request.getAttribute("result"));14    String str[] = (String[])request.getAttribute("result1");15 %>16 
     
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答对:
        
<%=end[0] %>
       
       
        
答错:
        
<%=end[1] %>
       
       
        
未答:
        
<%=end[2] %>
       
      
     
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答题情况
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      23    
24    <%   25        String color = "";26        for(int i = 0;i<60;++i){27           if(GradeTwo.key.get(i).equals(str[i])){28    %>29        
30    <%}31           else{32    %>33    
34    35    <%36    }37        }38    %>39 
      
       
        
题目
        
提交答案
        
正确答案
       
       
        
<%=GradeTwo.pro.get(i) %>
        
<%=str[i] %>
        
<%=GradeTwo.key.get(i) %>
       
       
        
<%=GradeTwo.pro.get(i) %>
        
<%=str[i] %>
        
<%=GradeTwo.key.get(i) %>
       
      
     
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标头:

1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2     pageEncoding="UTF-8"%> 3 
      4 
     
      " border="1" cellpadding="4" cellspacing="0"> 5  6 
        " color="#ffffff"> 7 
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<%=request.getParameter("title") %>
<%=request.getParameter("body") %>

产生表达式的Java文件:

1 package CC;  2   3 import java.util.ArrayList;  4 import java.util.List;  5 import java.util.Random;  6 import java.util.Set;  7 import java.util.Vector;  8   9 public class GradeTwo { 10     private static String opera = "+-*/"; 11     public static Vector
     
       pro = new Vector
      
       (); 12     public static Vector
       
         key = new Vector
        
         (); 13     public static void clear() { 14         pro.clear(); 15         key.clear(); 16     } 17     public static int isInteger(int c1, int c2, char opera) { 18         int result = 0; 19         int result1 = 0; 20         switch (opera) { 21         case '+': 22             result = c1 + c2; 23             break; 24         case '-': 25             result = c1 - c2; 26             break; 27         case '*': 28             result = c1 * c2; 29             break; 30         case '/': 31             result = c1 / c2; 32             result1 = c1 % c2; 33             break; 34         } 35         if (result >= 0 && result <= 100 && result1 == 0) 36             return result; 37         else 38             return -1; 39     } 40  41     public static String getPoly() { 42         String poly = ""; 43 //        Random random = new Random(); 44 //         45 //        int c1; 46 //        int c2; 47 //        int result; 48 //        char operac; 49 //        boolean flag = true; 50 //        do { 51 //            c1 = random.nextInt(100) + 1; 52 //            c2 = random.nextInt(100) + 1; 53 //            operac = opera.charAt(random.nextInt(4)); 54 //            if (operac == '*') 55 //                poly = c1 + " × " + c2 + " = "; 56 //            if (operac == '/') 57 //                poly = c1 + " ÷ " + c2 + " = "; 58 //            if (operac == '+') 59 //                poly = c1 + " + " + c2 + " = "; 60 //            if (operac == '-') 61 //                poly = c1 + " - " + c2 + " = "; 62 //            /*for (int i = 0;i
        
       
      
     

Servlet：

1 package Servlet; 2  3 import CC.GradeTwo; 4 import javax.servlet.http.HttpServlet; 5 import java.io.IOException; 6 import javax.servlet.ServletException; 7 import javax.servlet.http.HttpServletRequest; 8 import javax.servlet.http.HttpServletResponse; 9 10 11 12 public class GradeServlet extends HttpServlet{13     public void service(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException{14         String method = req.getParameter("method");15         if(method.equals("end"))end(req,resp); 16     }17     public void end(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException{18            String[]keys = req.getParameterValues("list");19            req.setAttribute("result",GradeTwo.end(keys));20            for(int i = 0;i

Filter:防止直接进入结果界面:

1 package Servlet; 2  3 import javax.servlet.http.HttpServlet; 4 import java.io.IOException; 5  6 import javax.servlet.Filter; 7 import javax.servlet.FilterChain; 8 import javax.servlet.FilterConfig; 9 import javax.servlet.ServletException;10 import javax.servlet.ServletRequest;11 import javax.servlet.ServletResponse;12 import javax.servlet.http.HttpServletRequest;13 import javax.servlet.http.HttpServletResponse;14 15 public class KeyFilter implements Filter{16     protected FilterConfig filterConfig;17     @Override18     public void destroy() {19         // TODO 自动生成的方法存根20         filterConfig = null;21     }22 23     @Override24     public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)25             throws IOException, ServletException {26         // TODO 自动生成的方法存根27           HttpServletRequest req = (HttpServletRequest)request;28           HttpServletResponse resp = (HttpServletResponse)response;29           String reqURL = req.getServletPath();30           if(reqURL.equals("/result.jsp")) {31               resp.sendRedirect("index.jsp");32               return;33           }34           chain.doFilter(request,response);35     }36 37     @Override38     public void init(FilterConfig filterConfig) throws ServletException {39         // TODO 自动生成的方法存根40          this.filterConfig = filterConfig;41     }42      43 }

xml文件:(需要添加)

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      GradeCal
      2   
     
       3       
      
       GradeServlet
       4       
      
       Servlet.GradeServlet
       5   
      6   
     
       7       
      
       GradeServlet
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       /Servlet/GradeServlet
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     10   
     
      11   
      
       KeyFilter
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       Servlet.KeyFilter
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     14   
     
      15   
      
       KeyFilter
      16   
      
       /*
      17   
     

 

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