1.设计思路
用javaweb以及java共同设计一个四则运算，页面为web，主题为java
2.源代码
package dao; import java.util.*; public class YunSuan { static int value=0; public YunSuan() { } public void setValue() { value++; } public int getValue() { return value; } Random rd=new Random(); String fh[]={"+","-","*","/"}; int num1; int num2; int h; static int t,f; public int getT() { return t; } public void setT() { t++; } public int getF() { return f; } public void setF() { f++; } int number; static int answer; public int getAnswer() { return answer; } public void setAnswer(int answer) { this.answer = answer; } public int getNum1() { return num1; } public void setNum1(int num1) { this.num1 =num1; } public int getNum2() { return num2; } public void setNum2(int num2) { this.num2 =num2; } public int getH() { return h; } public void setH(int h) { this.h = h; } public String[] getFh() { return fh; } public void fuzhi() { Random rd=new Random(); num1=1+rd.nextInt(101); num2=1+rd.nextInt(101); h=rd.nextInt(4); setNum1(num1); setNum2(num2); setH(h); if(fh[h].equals("+")) { if(num1+num2<=100) { setAnswer(num1+num2); } else { fuzhi(); } } else if(fh[h].equals("-")) { setAnswer(num1-num2); } else if(fh[h].equals("*")) { if(num1*num2<=0) { setAnswer(num1*num2); } else { fuzhi2(); } } else if(fh[h].equals("/")) { if(getNum1()%getNum2()==0) { setAnswer(num1/num2); } else { fuzhi(); } } } public void fuzhi2() { Random rd=new Random(); num1=1+rd.nextInt(11); num2=1+rd.nextInt(11); setNum1(num1); setNum2(num2); setAnswer(num1*num2); } public void showt() { } public static void main(String args[]) { YunSuan ys=new YunSuan(); ys.fuzhi(); System.out.println(ys.getNum1()+ys.getFh()[ys.getH()]+ys.getNum2()+"="+ys.getAnswer()); } }
package server; 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 YunSuan */ @WebServlet("/YunSuan") public class YunSuan extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public YunSuan() { super(); // TODO Auto-generated constructor stub } /** * @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); } }
package util; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; public class ValidateUtil { static int i=0; public static boolean validateNull(HttpServletRequest request,String[] fileds) { boolean validate = true; //map对象用来装载不同的错误信息 Map<String,String> errorMsg = new HashMap(); for(String filed :fileds) { String value = request.getParameter(filed); if (value == null || "".equals(value.trim())) { validate = false; i++; errorMsg.put(filed, "目前未答"+i+"道！"); } if (!validate) { request.setAttribute("errormsg", errorMsg); } } return validate; } public static String showError(HttpServletRequest request , String filed) { Map<String, String> errorMsg = (Map<String,String>)request.getAttribute("errormsg"); if (errorMsg == null) { return ""; } String msg = errorMsg.get(filed); if (msg == null) { return ""; } return msg; } }
<%@ 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>Insert title here</title> </head> <body style="background-image:url('../image/2.jpg');"> <center style="color:red ; font-family:华文行楷;font-size:80px">谢谢使用！</center> </body> </html>
<%@page import="dao.YunSuan"%> <%@page import="java.util.*" %> <%@page import="util.ValidateUtil"%> <%@page import="java.util.Map"%> <%@ 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> <title>四则运算</title> </head> <body style="background-image:url('../image/2.jpg');"> <%Map<String,String> errorMsg = (Map<String,String>)request.getAttribute("errormsg"); %> <form action="page2.jsp" method="get"> <center style="color:red ; font-family:华文行楷;font-size:35px">四则运算</center> <br> <br> <% YunSuan ys=new YunSuan(); ys.fuzhi(); %> <center style="color:black ; font-family:楷体;font-size:20px"> 第<%=ys.getValue()+1%>题：<% ys.setValue(); out.println(ys.getNum1()+ys.getFh()[ys.getH()]+ys.getNum2()); %></center> <!-- <script language='javaScript' > setTimeout("alert('5 seconds!')",5000);</script>--> <br> <br> <center style="color:black ; font-family:楷体;font-size:15px" > 输入答案 <input type="text" name="answer" placeholder="请输入答案"/></center> <br> <center style="color:red ; font-family:楷体;font-size:20px"><% out.println("目前正确"+ys.getT()+"道！"); %></center> <br> <center style="color:red ; font-family:楷体;font-size:20px"><% out.println("目前错误"+ys.getF()+"道！"); %></center> <br> <center style="color:red ; font-family:楷体;font-size:20px"><%=ValidateUtil.showError(request, "answer") %></center> <br> <center><input type="submit" value="提交" /></center> <br> <center><a href="end.jsp"><input type="button" value="退出" /></a></center> </form> </body> </html>
<%@page import="dao.YunSuan"%> <%@page import="util.ValidateUtil"%> <%@ 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> <body style="background-image:url('../image/2.jpg');"> <jsp:useBean id="yy" class="dao.YunSuan" scope="page"/> <% String an=request.getParameter("answer"); boolean validate = ValidateUtil.validateNull(request, new String[]{"answer"}); if(!validate){ %> <jsp:forward page="page.jsp"></jsp:forward> <% } int answer=Integer.parseInt(an); if(answer==yy.getAnswer()) { yy.setT(); %> <br> <script language='javaScript' > alert('正确');</script> <% response.setHeader("refresh", "0;url=page.jsp"); } else { yy.setF(); %> <script language='javaScript'> alert('错误');</script> <% response.setHeader("refresh", "0;url=page.jsp"); } %> </body> </html>
3.运行截图
4.时间记录日志
| Personal Software Process Stages | Time |
| 需求分析 (包括学习新技术) | 0.5 |
| 生成设计文档 | 0.5 |
| 设计复审 | 0.5 |
| 代码规范 | 0.5 |
| 具体设计 | 1 |
| 具体编码 | 2 |
| 代码复审 | 1 |
| 测试（自我测试，修改代码，提交修改） | 3 |
| 合计 | 9 |