四则运算
1 package com.jaovo.msg.dao; 2 3 import java.util.List; 4 5 import com.jaovo.msg.model.Shizi; 6 7 public interface IuseShizi { 8 public List<Shizi> chuTi(int quality);//鍑洪 9 public void Suanfen();//绠楀垎鏁? 10 public void baoCun();//淇濆瓨 11 12 13 }
1 package com.jaovo.msg.dao; 2 3 import java.sql.Connection; 4 import java.sql.PreparedStatement; 5 import java.sql.SQLException; 6 7 import com.jaovo.msg.model.Shizi; 8 import com.jaovo.msg.util.DBUtil; 9 10 public class MangageShizi { 11 12 public void add(Connection connection,Shizi shizi) 13 { 14 String sql="insert into shi_s(firstnumber,secondnumber,characte,realanswer) value (?,?,?,?)"; 15 16 PreparedStatement preparedStatement=null; 17 try { 18 preparedStatement = connection.prepareStatement(sql); 19 preparedStatement.setInt(1,shizi.getFirstNumber()); 20 preparedStatement.setInt(2, shizi.getSecondNumber()); 21 preparedStatement.setString(3, shizi.getCharacter()); 22 preparedStatement.setInt(4, shizi.getRealAnswer()); 23 preparedStatement.executeUpdate(); 24 25 } catch (SQLException e) { 26 // TODO Auto-generated catch block 27 e.printStackTrace(); 28 }finally { 29 DBUtil.close(preparedStatement); 30 //DBUtil.close(connection); 31 32 } 33 } 34 35 }
1 package com.jaovo.msg.model; 2 3 public class Shizi { 4 private int firstNumber; 5 private int secondNumber; 6 private int maybeThirdNumber; 7 private int answer; 8 private int realAnswer; 9 private String character; 10 private boolean rightOrWrong; 11 public int getMaybeThirdNumber() { 12 return maybeThirdNumber; 13 } 14 public void setMaybeThirdNumber(int maybeThirdNumber) { 15 this.maybeThirdNumber = maybeThirdNumber; 16 } 17 public int getAnswer() { 18 return answer; 19 } 20 public void setAnswer(int answer) { 21 this.answer = answer; 22 } 23 public int getRealAnswer() { 24 return realAnswer; 25 } 26 public void setRealAnswer(int realAnswer) { 27 this.realAnswer = realAnswer; 28 } 29 public int getFirstNumber() { 30 return firstNumber; 31 } 32 public void setFirstNumber(int firstNumber) { 33 this.firstNumber = firstNumber; 34 } 35 public int getSecondNumber() { 36 return secondNumber; 37 } 38 public void setSecondNumber(int secondNumber) { 39 this.secondNumber = secondNumber; 40 } 41 public String getCharacter() { 42 return character; 43 } 44 public void setCharacter(String character) { 45 this.character = character; 46 } 47 public boolean isRightOrWrong() { 48 return rightOrWrong; 49 } 50 public void setRightOrWrong(boolean rightOrWrong) { 51 this.rightOrWrong = rightOrWrong; 52 } 53 54 }
1 package com.jaovo.msg.servlet; 2 3 import java.io.IOException; 4 import java.sql.Connection; 5 import java.util.Random; 6 7 import javax.servlet.RequestDispatcher; 8 import javax.servlet.ServletException; 9 import javax.servlet.annotation.WebServlet; 10 import javax.servlet.http.HttpServlet; 11 import javax.servlet.http.HttpServletRequest; 12 import javax.servlet.http.HttpServletResponse; 13 14 import com.jaovo.msg.dao.MangageShizi; 15 import com.jaovo.msg.model.Shizi; 16 import com.jaovo.msg.util.DBUtil; 17 18 /** 19 * Servlet implementation class MyServlet 20 */ 21 @WebServlet("/MyServlet") 22 public class MyServlet extends HttpServlet { 23 private static final long serialVersionUID = 1L; 24 public MyServlet() { 25 super(); 26 } 27 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 28 doPost(request,response); 29 } 30 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 31 int quality = Integer.parseInt(request.getParameter("quality")); 32 Connection connection = DBUtil.getConnection(); 33 MangageShizi mShizi=new MangageShizi(); 34 Random random=new Random(); 35 int a,b,d; 36 char ch; 37 for(int i=0;i<quality;i++) 38 { 39 d=random.nextInt(4); 40 if(d==0) 41 ch='+'; 42 else if(d==1) 43 ch='-'; 44 else if(d==2) 45 ch='*'; 46 else 47 ch='/'; 48 Shizi shizi=new Shizi(); 49 shizi.setCharacter(String.valueOf(ch)); 50 if(d==0) { 51 a=random.nextInt(100)+1; 52 b=random.nextInt(100-a)+1; 53 shizi.setFirstNumber(a); 54 shizi.setSecondNumber(b); 55 shizi.setRealAnswer(a+b); 56 } 57 else if(d==1) { 58 a=random.nextInt(100)+1; 59 b=random.nextInt(100)+1; 60 if(a<b) { 61 b=random.nextInt(100)+1; 62 } 63 shizi.setFirstNumber(a); 64 shizi.setSecondNumber(b); 65 shizi.setRealAnswer(a-b); 66 } 67 else if(d==2) { 68 a=random.nextInt(11); 69 b=random.nextInt(11); 70 shizi.setFirstNumber(a); 71 shizi.setSecondNumber(b); 72 shizi.setRealAnswer(a*b); 73 } 74 else { 75 a=random.nextInt(11); 76 b=random.nextInt(11); 77 a=a*b; 78 shizi.setFirstNumber(a); 79 shizi.setSecondNumber(b); 80 shizi.setRealAnswer(a/b); 81 } 82 mShizi.add(connection,shizi); 83 } 84 DBUtil.close(connection); 85 //System.out.println("鏁版嵁搴?"); 86 RequestDispatcher dispatcher = request.getRequestDispatcher("doit.jsp"); 87 dispatcher .forward(request, response); 88 //request.getRequestDispatcher("../doit.jsp").forward(request, response); 89 } 90 91 }
1 package com.jaovo.msg.util; 2 3 import java.sql.Connection; 4 import java.sql.DriverManager; 5 import java.sql.PreparedStatement; 6 import java.sql.ResultSet; 7 import java.sql.SQLException; 8 9 public class DBUtil { 10 11 public static Connection getConnection() { 12 try { 13 Class.forName("com.mysql.jdbc.Driver").newInstance(); 14 } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) { 15 // TODO Auto-generated catch block 16 e.printStackTrace(); 17 } 18 String user = "root"; 19 String password = "root"; 20 String url = "jdbc:mysql://localhost:3306/jaovo_msg?useUnicode=true&characterEncoding=utf-8&useSSL=false"; 21 //jdbc:mysql://localhost:3306/jaovo_msg?useUnicode=true&characterEncoding=utf-8&useSSL=false 22 Connection connection = null; 23 try { 24 //2 鍒涘缓閾炬帴瀵硅薄connection 25 connection = DriverManager.getConnection(url,user,password); 26 } catch (SQLException e) { 27 // TODO Auto-generated catch block 28 e.printStackTrace(); 29 } 30 return connection; 31 } 32 public static void close(Connection connection) { 33 if(connection!=null) { 34 try { 35 connection.close(); 36 } catch (SQLException e) { 37 // TODO Auto-generated catch block 38 e.printStackTrace(); 39 } 40 } 41 } 42 43 public static void close(PreparedStatement preparedStatement) { 44 try { 45 if (preparedStatement != null) { 46 preparedStatement.close(); 47 } 48 49 } catch (SQLException e) { 50 // TODO Auto-generated catch block 51 e.printStackTrace(); 52 } 53 } 54 public static void close(ResultSet resultSet) { 55 try { 56 if (resultSet != null) { 57 resultSet.close(); 58 } 59 60 } catch (SQLException e) { 61 // TODO Auto-generated catch block 62 e.printStackTrace(); 63 } 64 } 65 66 }
1 <%@page import="java.sql.ResultSet"%> 2 <%@page import="java.sql.Statement"%> 3 <%@page import="java.sql.Connection"%> 4 <%@page import="com.jaovo.msg.util.DBUtil"%> 5 <%@ page language="java" contentType="text/html; charset=UTF-8" 6 pageEncoding="UTF-8"%> 7 <% 8 String path = request.getContextPath(); 9 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 10 %> 11 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 12 <html> 13 <head> 14 <base href="<%=basePath%>"> 15 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 16 <title>答题</title> 17 </head> 18 <body> 19 <% 20 Connection connection = DBUtil.getConnection(); 21 Statement statement=connection.createStatement(); 22 ResultSet resultSet=statement.executeQuery("select * from shi_s"); 23 int idn=0; 24 while(resultSet.next()) 25 { 26 int num1=resultSet.getInt("firstnumber"); 27 int num2=resultSet.getInt("secondnumber"); 28 String character=resultSet.getString("characte"); 29 int realanswer=resultSet.getInt("realanswer"); 30 String ind=String.valueOf(realanswer); 31 if(request.getParameter(ind)!=null) 32 { 33 int answer=Integer.parseInt(request.getParameter(ind)); 34 %> 35 <label for="name" ><%=num1+character+num2 %>=</label> 36 <table width="75" border="1"> 37 <tr> 38 <td> 39 <%=answer %> 40 </td> 41 42 </tr> 43 </table> 44 <% 45 if(answer==realanswer) 46 { 47 %>回答正确 <% 48 } 49 else{ 50 %>回答错误,正确答案为<%=realanswer %> 51 <% 52 } 53 } 54 else 55 { 56 out.print(request.getParameter(ind)); 57 out.print("出错"); 58 } 59 60 } 61 statement.executeUpdate("delete from shi_s"); 62 %> 63 64 <p> 65 </body> 66 </html>
1 <%@page import="java.sql.ResultSet"%> 2 <%@page import="java.sql.Statement"%> 3 <%@page import="java.sql.Connection"%> 4 <%@page import="com.jaovo.msg.util.DBUtil"%> 5 <%@page import="com.jaovo.msg.model.Shizi"%> 6 <%@page import="java.util.ArrayList"%> 7 <%@page import="java.util.Random"%> 8 <%@page import="java.util.ArrayList"%> 9 <%@page import="java.util.List"%> 10 <%@ page language="java" contentType="text/html; charset=UTF-8" 11 pageEncoding="UTF-8"%> 12 <% 13 String path = request.getContextPath(); 14 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 15 %> 16 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 17 <html> 18 <head> 19 <base href="<%=basePath%>"> 20 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 21 <title>做题页面</title> 22 </head> 23 <body> 24 <input type="button" value="倒计时" id="counter" /><br /><br /> 25 <input type="button" value="开始" id="start" /> 26 <script type="text/javascript"> 27 function $(id){return document.getElementById(id)} 28 var i=20,s=''; 29 $('start').onclick=function(){ 30 i=20;s=''; 31 var t=setInterval(function(){ 32 if(s!='是否重新计时?' && i>0){ 33 $('counter').value='倒计时'+(i--)+'秒'; 34 }else{ 35 clearInterval(t) 36 if(i==0)alert('时间到') 37 } 38 },1000); 39 } 40 $('stop').onclick=function(){ 41 s=$('arg').value; 42 } 43 </script> 44 <form id="form1" name="form1" method="post" action="answer.jsp"> 45 <% 46 Connection connection = DBUtil.getConnection(); 47 Statement statement=connection.createStatement(); 48 ResultSet resultSet=statement.executeQuery("select * from shi_s"); 49 int idn=0; 50 while(resultSet.next()) 51 { 52 idn++; 53 int num1=resultSet.getInt("firstnumber"); 54 int num2=resultSet.getInt("secondnumber"); 55 String character=resultSet.getString("characte"); 56 int realanswer=resultSet.getInt("realanswer"); 57 58 %> 59 <label for="name"> 60 <%=num1+character+num2 %>= 61 </label> 62 <input type="text" name="<%=realanswer %>" id="<%=realanswer %>" /> 63 <% 64 } 65 %> 66 <input type="submit" name="提交"/> 67 </form> 68 <% 69 70 %> 71 </body> 72 </html>
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <% 4 String path = request.getContextPath(); 5 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 6 %> 7 8 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 9 <html> 10 <head> 11 <base href="<%=basePath%>"> 12 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 13 <object height="100" width="100" data="abc.mp3"></object> 14 <title>首页</title> 15 </head> 16 <body> 17 <style type="text/css"> 18 body,td,th{ 19 font-size: 24px; 20 } 21 body{ 22 background-color: #0CF; 23 background-image: url(a.jpg); 24 } 25 26 </style> 27 <% 28 29 %> 30 <form id="form1" name="form1" method="post" action="MyServlet"> 31 多少道题 : 32 <input type="text" name="quality" size="20" /> 33 <input type="submit" value="开始" /> 34 </form> 35 36 </body> 37 </html>