JAVA-WEB-简单的四则运算
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首先附上选择题目数量和每行题数的JSP代码
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8" %> <meta http-equiv="Content-Type" content="text/html;charset=ytf-8"> <title>四则运算</title> </head> <% Object message=request.getAttribute("message"); if(!(message==null||message.equals(""))) { %> <script type="text/javascript">alert(\'<%=message%>\')</script> <% } %> <body style="background-color:pink" align="center"> <form action="SizeServlet?method=submit" method="post"> <br> <br> <br> <br> <br> <br> <br> <br> <p style="padding-left:200px;">请输入您要出多少道题:<input type="text" style="width:50px" name="sum"></p> <p style="padding-left:200px;">请输入一行几到题:<input type="text" style="width:50px" name="n"></p> <p style="padding-left:200px;"><input type="submit" value="提交"></p> </form> </body> </html>
现在是接收的Servlet层
package math; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Servlet implementation class SizeServlet */ @WebServlet("/SizeServlet") public class SizeServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public SizeServlet() { super(); // TODO Auto-generated constructor stub } protected void service(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException { arg0.setCharacterEncoding("utf-8"); arg1.setCharacterEncoding("utf-8"); String function=arg0.getParameter("method"); if(function.equals("submit")) { String str; int sum,n; str=arg0.getParameter("sum"); if(str==""||str==null) { arg0.setAttribute("message", "提交失败,题目数不能为空"); arg0.getRequestDispatcher("NewFile1.jsp").forward(arg0, arg1); return; } sum=Integer.valueOf(str).intValue(); str=arg0.getParameter("n"); if(str==""||str==null) { arg0.setAttribute("message", "提交失败,每行个数不能为空"); arg0.getRequestDispatcher("NewFile1.jsp").forward(arg0, arg1); return; } n=Integer.valueOf(str).intValue(); SizeService.setSum(sum); SizeService.setN(n); if(sum<=1000&&n<=8&&n>0) { arg0.setAttribute("message", "提交成功"); arg0.getRequestDispatcher("NewFile.jsp").forward(arg0, arg1); return; } else { arg0.setAttribute("message", "提交失败"); arg0.getRequestDispatcher("NewFile1.jsp").forward(arg0, arg1); return; } } } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub response.getWriter().append("Served at: ").append(request.getContextPath()); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
然后是出题的代码
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <%@ page language="java" import="math.StringHandle"%> <%@ page language="java" import="math.EntityToString"%> <%@ page language="java" import="math.MathGenerate"%> <%@ page language="java" import="math.SizeService"%> <title>四则运算</title> </head> <body style="background-color:pink" align="center"> <form action="NewFile2.jsp"> <table align="center"> <% MathGenerate mg=new MathGenerate(); int m,n; m=SizeService.getSum(); n=SizeService.getN(); mg.generate(m, 1); for(int i=0;i<mg.getAnwser().size();) { %> <!-- 一行有几个 --> <tr> <% for(int j=0;j<n&&i<m;j++,i++) { %> <td ><%=mg.getQuestion().get(i) %></td> <td>=</td> <td><input type="hidden" name="question" value=<%=mg.getQuestion().get(i) %>></td> <td><input type="text" style="width:50px" name="answer" ></td> <td><input type="hidden" name="daan" value=<%=mg.getAnwser().get(i) %>></td> <%} %> </tr> <%}%> </table> <p align="center"><input type="submit" value="提交"></p> </form> </body> </html>
其中出题代码中的MathGenerate（）是自己定义的一个出题的类，专门用来出题，这里可以改成自己写的任何其他的出题类
然后就是判断做题是否正确的代码
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <%@ page language="java" import="math.SizeService"%> <title>四则运算</title> </head> <body style="background-color:pink" align="center"> <table align="center"> <% String answer[]=request.getParameterValues("answer"); String daan[]=request.getParameterValues("daan"); String question[]=request.getParameterValues("question"); int m,n; m=SizeService.getSum(); n=SizeService.getN(); for(int i=0;i<m;i++) { if(answer[i].equals("")) { %> <tr> <td>您没有做第<%=i+1 %>题:</td> <td><%=question[i] %></td> <td>=</td> <td> </td> <td>这道题的正确答案是<%=daan[i] %></td> </tr> <%} else if(daan[i].equals(answer[i])) { %> <tr> <td>您做的第<%=i+1 %>题:</td> <td><%=question[i] %></td> <td>=</td> <td><%=answer[i] %></td> <td>恭喜您做对了这道题</td> </tr> <% } else { %> <tr> <td>您做的第<%=i+1 %>题:</td> <td><%=question[i] %></td> <td>=</td> <td><%=answer[i] %></td> <td>很遗憾您做错了这道题，正确答案是<%=daan[i] %></td> </tr> <%} %> <%}%> </table> <a href="NewFile1.jsp"><button style="border:0px solid;background:lightblue;margin-left:50%;">重新做题</button></a> <br> <br> <a href="NewFile3.jsp"><button style="border:0px solid;background:red;margin-left:50%;">结束答题</button></a> </body> </html>
这个主要的就是值的传递
然后就是最简单的结束代码
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>结束</title>
</head>
<body style="background-image:url(44444.jpg);" align="center">
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<h1 style="color:red;font-size:500%" align="center">结束答题！</h1>
</body>
</html>
其中插了一张图片可根据自己需要删除
接下来是运行过程图片
提交之后进入答题界面：
点击提交进入判断正误界面（我没做这个题所以是这个样子）
在判断完正误之后可以选择继续答题或者结束答题
结束答题时这个样子的
这个四则运算主要的就是在JSP文件中值进行传递和页面的跳转其他的问题都时一些JAVA封装好的类然后进行调用
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