简单的四则运算网页版
四、源代码
欢迎界面
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2 <html> 3 <head> 4 <%@ page language="java" contentType="text/html; charset=UTF-8" 5 pageEncoding="UTF-8"%> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>小学二年级算式计算</title> 8 </head> 9 <body> 10 <h2 align="center" style="color:red">小学二年级算式计算</h2> 11 <p align="center">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。</p> 12 <div align="center"> 13 <a href="proshow.jsp">按下此键开始</a> 14 </div> 15 </body> 16 </html>
题目展示界面
1 <%@page import="CC.GradeTwo" %> 2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 3 <html> 4 <head> 5 <%@ page language="java" contentType="text/html; charset=UTF-8" 6 pageEncoding="UTF-8"%> 7 <meta http-equiv="refresh" content="text/html; charset=UTF-8"> 8 <script type="text/javascript"> 9 var maxtime = 8*60; 10 function CountDowm(){ 11 if(maxtime>=0){ 12 minutes = Math.floor(maxtime/60); 13 seconds = Math.floor(maxtime%60); 14 if(seconds>=10) 15 msg = "剩余时间:"+minutes+":"+seconds; 16 else 17 msg = "剩余时间:"+minutes+":0"+seconds; 18 document.all["timer"].innerHTML = msg; 19 --maxtime; 20 } 21 else{ 22 document.forms("form1").submit(); 23 } 24 } 25 timer = setInterval("CountDowm()",1000); 26 </script> 27 <title>小学二年级算式计算</title> 28 </head> 29 <% 30 String str = null; 31 %> 32 <body> 33 34 <% 35 request.setCharacterEncoding("utf-8"); 36 %> 37 <jsp:include flush="true" page="inc.jsp"> 38 <jsp:param name="color" value="blue" /> 39 <jsp:param name="title" value="小学二年级" /> 40 <jsp:param name="body" value="数学口算题" /> 41 </jsp:include> 42 <div id="timer"></div> 43 <form name="form1" action="${pageContext.request.contextPath}/Servlet/GradeServlet?method=end" target="_self" method="post"> 44 <table align="center" border = "1"> 45 <tr><th colspan="3">共60题,注意用时</th></tr> 46 <% GradeTwo.clear(); 47 for(int i = 1;i<=60;++i) { 48 str = GradeTwo.getPoly(); 49 50 %> 51 <tr><td>第<%=i %>题</td><td><%=str %></td><td><input type="text" name="list"></td></tr> 52 <% 53 } 54 %> 55 <tr><td colspan="3" align="center"><input type="submit" value="提交"></td></tr> 56 </table> 57 </form> 58 </body> 59 </html>
结果展示界面
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2 <html> 3 <head> 4 <%@page import="CC.GradeTwo" %> 5 <%@ page language="java" contentType="text/html; charset=UTF-8" 6 pageEncoding="UTF-8"%> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>答案</title> 9 </head> 10 <body> 11 <h3 align="center" style="color:red">答题结果</h3> 12 <% 13 int[]end = (int[])(request.getAttribute("result")); 14 String str[] = (String[])request.getAttribute("result1"); 15 %> 16 <table align="center" border="1"> 17 <tr><th>答对:</th><td><%=end[0] %></td></tr> 18 <tr><th>答错:</th><td><%=end[1] %></td></tr> 19 <tr><th>未答:</th><td><%=end[2] %></td></tr> 20 </table><p> 21 <p align="center" style="color:red">答题情况</p> 22 <table align="center" border="1"> 23 <tr><td>题目</td><td>提交答案</td><td>正确答案</td></tr> 24 <% 25 String color = ""; 26 for(int i = 0;i<60;++i){ 27 if(GradeTwo.key.get(i).equals(str[i])){ 28 %> 29 <tr><td><%=GradeTwo.pro.get(i) %></td><td style="color:green"><%=str[i] %></td><td><%=GradeTwo.key.get(i) %></td></tr> 30 <%} 31 else{ 32 %> 33 <tr><td><%=GradeTwo.pro.get(i) %></td><td style="color:red"><%=str[i] %></td><td><%=GradeTwo.key.get(i) %></td></tr> 34 35 <% 36 } 37 } 38 %> 39 </table> 40 <div align="center"><input type="button" value="再来一次" onclick="window.location.href='<%=request.getContextPath()%>/proshow.jsp'" /></div> 41 </body> 42 </html>
标头:
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4 <table width="320" bordercolor="<%=request.getParameter("color") %>" border="1" cellpadding="4" cellspacing="0"> 5 6 <tr bgcolor="<%=request.getParameter("color") %>" color="#ffffff"> 7 <td><%=request.getParameter("title") %></td> 8 </tr> 9 <tr><td valign="top"><%=request.getParameter("body") %></td></tr> 10 </table>
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<String> pro = new Vector<String>(); 12 public static Vector<String> key = new Vector<String>(); 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<pro.size();++i) { 63 // if (poly.equals(pro.get(i))) { 64 // flag = false; 65 // break; 66 // } 67 // }*/ 68 // } while (!flag || (result = isInteger(c1, c2, operac)) < 0); 69 // pro.add(poly); 70 // key.add(String.valueOf(result)); 71 Random random = new Random(); 72 //产生0.9的两位运算,0.1的三位运算 73 char operate; 74 char operate1; 75 int operand1 = 0; 76 int operand2 = 0; 77 int operand3 = 0; 78 int result; 79 int percent = random.nextInt(100)+1; 80 if(percent<=90) { 81 operate = opera.charAt(random.nextInt(4)); 82 switch(operate) { 83 case '+': 84 operand1 = random.nextInt(100); 85 operand2 = random.nextInt(100-operand1); 86 poly = operand1+" + "+operand2+" = "; 87 break; 88 case '-': 89 operand1 = random.nextInt(100); 90 operand2 = random.nextInt(operand1+1); 91 poly = operand1+" - "+operand2+ " = "; 92 break; 93 case '*': 94 operand1 = random.nextInt(9)+1; 95 operand2 = random.nextInt(9)+1; 96 poly = operand1+" × "+operand2+ " = "; 97 break; 98 case '/': 99 operand1 = random.nextInt(9)+1; 100 operand2 = random.nextInt(9)+1; 101 operand1 = operand1*operand2; 102 poly = operand1+" ÷ "+operand2+ " = "; 103 break; 104 } 105 result = isInteger(operand1, operand2, operate); 106 key.add(String.valueOf(result)); 107 }else { 108 operate = opera.charAt(random.nextInt(2)); 109 operate1 = opera.charAt(random.nextInt(2)); 110 if(operate=='+') { 111 operand1 = random.nextInt(100); 112 operand2 = random.nextInt(100-operand1); 113 if(operate1=='+') { 114 operand3 = random.nextInt(100-operand1-operand2); 115 poly = operand1+" + "+operand2+" + "+operand3+" = "; 116 }else { 117 operand3 = random.nextInt(operand1+operand2); 118 poly = operand1+" + "+operand2+" - "+operand3+" = "; 119 } 120 }else { 121 operand1 = random.nextInt(100)+1; 122 operand2 = random.nextInt(operand1); 123 if(operate1=='+') { 124 operand3 = random.nextInt(100-operand1+operand2); 125 poly = operand1+" - "+operand2+" + "+operand3+" = "; 126 }else { 127 operand3 = random.nextInt(operand1-operand2); 128 poly = operand1+" - "+operand2+" - "+operand3+" = "; 129 } 130 } 131 result = isInteger(operand1, operand2, operate); 132 result = isInteger(result, operand3, operate1); 133 key.add(String.valueOf(result)); 134 } 135 pro.add(poly); 136 return poly; 137 } 138 public static int[]end(String[]list){ 139 int[]result = new int[3]; 140 result[0] = 0; 141 result[1] = 0; 142 result[2] = 0; 143 int len = list.length; 144 for(int i = 0;i<len;++i) { 145 if(key.get(i).equals(list[i]))result[0]++; 146 else { 147 if(list[i].equals(""))result[2]++; 148 else result[1]++; 149 } 150 } 151 return result; 152 } 153 public static void main(String[]args) { 154 int result = isInteger(55,13,'-'); 155 result = isInteger(result,19,'-'); 156 System.out.println(result); 157 } 158 }
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<keys.length;++i) 21 if(keys[i].equals(""))keys[i] = "未答"; 22 req.setAttribute("result1",keys); 23 req.getRequestDispatcher("../result.jsp").forward(req, resp); 24 return; 25 } 26 }
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 @Override 18 public void destroy() { 19 // TODO 自动生成的方法存根 20 filterConfig = null; 21 } 22 23 @Override 24 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 @Override 38 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)
1 <display-name>GradeCal</display-name> 2 <servlet> 3 <servlet-name>GradeServlet</servlet-name> 4 <servlet-class>Servlet.GradeServlet</servlet-class> 5 </servlet> 6 <servlet-mapping> 7 <servlet-name>GradeServlet</servlet-name> 8 <url-pattern>/Servlet/GradeServlet</url-pattern> 9 </servlet-mapping> 10 <filter> 11 <filter-name>KeyFilter</filter-name> 12 <filter-class>Servlet.KeyFilter</filter-class> 13 </filter> 14 <filter-mapping> 15 <filter-name>KeyFilter</filter-name> 16 <url-pattern>/*</url-pattern> 17 </filter-mapping>
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