1.实验要求：
2.实验思路：使用jsp Javabean和servlet来实现，Javabean定义实体类，定义能根据设置的参数产生出对应的方法，jsp页面用来让用户选择参数，做题和查看历史记录，servlet根据jsp传的数据进行响应和处理。
首先有一个选择界面的jsp，如果选择做题就跳转到设置参数的jsp，设置好参数后，传到servlet，servlet根据传过来的参数产生题目，存储好以后，跳转到显示题目的jsp页面，用户可以输入答案，当交卷的时候会提交到判断的servlet，servlet根据传过的答案和正确答案进行比较，并输出做对和做错的题号，然后输出每道题和每道题的判断结果；如果选择的是查看历史记录，就会查看以前所做的题目。
3.实验代码：
//选择做题还是查询历史记录
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <h1>请选择是做题还是查询历史记录</h1> 11 <hr> 12 <br> 13 <br> 14 <br> 15 <a href="setParam.jsp"><input type="button" value="开始做题"></a> 16 <a href="selectServlet"><input type="button" value="查询历史记录"></a> 17 </body> 18 </html>
//设置参数，比如是否要括号，做真分数还是整数等等
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 7 8 <style> 9 span { 10 color:blue; 11 } 12 13 </style> 14 <script type="text/javascript"> 15 $(function() 16 { 17 $('#formbackground').height($(window).height()); 18 $('#formbackground').width($(window).width()); 19 } 20 ); 21 </script> 22 <script type="text/javascript"> 23 function $(id) 24 { 25 return document.getElementById(id); 26 } 27 function check() { 28 var num=$("num").value; 29 var scope=$("scope").value; 30 $("numinfo").innerHTML=""; 31 $("scopeinfo").innerHTML=""; 32 if(num=="") 33 { 34 $("numinfo").innerHTML="题数不能为空，请输入题数"; 35 $("num").focus(); 36 return false; 37 } 38 if(scope=="") 39 { 40 $("scopeinfo").innerHTML="取值范围不能为空，请输入范围"; 41 $("scope").focus(); 42 return false; 43 } 44 return true; 45 } 46 </script> 47 <title>Insert title here</title> 48 </head> 49 <body> 50 <h1>请选择做题的类型</h1> 51 <br> 52 <form action="setParamServlet" method="post" onsubmit="return check()"> 53 <table> 54 <tr> 55 <td>类型：</td> 56 <td>整数<input type="radio" name="type" value="2" checked="checked"></td> 57 <td>真分数<input type="radio" name="type" value="1"></td> 58 </tr> 59 <tr> 60 <td>题数：</td> 61 <td><input type="text" name="num" id="num"><span id="numinfo"></span></td> 62 </tr> 63 <tr> 64 <td>取值范围：</td> 65 <td><input type="text" name="scope" id="scope"><span id="scopeinfo"></span></td> 66 </tr> 67 <tr> 68 <td>是否含有括号</td> 69 <td>无<input type="radio" name="isBracket" value="2" checked="checked"></td> 70 <td>有<input type="radio" name="isBracket" value="1"></td> 71 </tr> 72 <tr> 73 <td><input type="submit" value="确认"> <input type="reset" value="取消"></td> 74 </tr> 75 </table> 76 </form> 77 </body> 78 </html>
//产生题目的servlet
1 package servlet; 2 3 import java.io.IOException; 4 import java.io.PrintWriter; 5 import java.sql.SQLException; 6 7 import javax.servlet.ServletConfig; 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 util.publicUse; 15 16 /** 17 * Servlet implementation class setParamServlet 18 */ 19 @WebServlet("/setParamServlet") 20 public class setParamServlet extends HttpServlet { 21 private static final long serialVersionUID = 1L; 22 23 /** 24 * @see HttpServlet#HttpServlet() 25 */ 26 public setParamServlet() { 27 super(); 28 // TODO Auto-generated constructor stub 29 } 30 31 /** 32 * @see Servlet#init(ServletConfig) 33 */ 34 public void init(ServletConfig config) throws ServletException { 35 // TODO Auto-generated method stub 36 } 37 38 /** 39 * @see Servlet#destroy() 40 */ 41 public void destroy() { 42 // TODO Auto-generated method stub 43 } 44 45 /** 46 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) 47 */ 48 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 49 // TODO Auto-generated method stub 50 doPost(request, response); 51 } 52 53 /** 54 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 55 */ 56 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 57 // TODO Auto-generated method stub 58 59 // TODO Auto-generated method stub 60 publicUse P = new publicUse(); 61 response.setContentType("text/html;charset=utf-8"); 62 String type;//题目类型 63 int num;//题数 64 int scope;//范围 65 String isBracket;//是否含有括号 66 type=request.getParameter("type"); 67 num=Integer.parseInt(request.getParameter("num")); 68 scope=Integer.parseInt(request.getParameter("scope")); 69 isBracket=request.getParameter("isBracket"); 70 PrintWriter out = response.getWriter(); 71 System.out.println(type+" "+num+" "+scope+" "+isBracket); 72 int choose1=Integer.parseInt(type); 73 int choose2=Integer.parseInt(isBracket); 74 try { 75 76 String rs[]=new String[2*num]; 77 rs=P.operationAndStatistical(choose1, choose2, num,scope); 78 String []bds = new String[num];//存取表达式 79 String []rs1 = new String[num];//存取结果 80 for(int i=0;i<num;i++) 81 { 82 bds[i] = rs[i]; 83 rs1[i] = rs[i + num]; 84 } 85 86 request.getSession().setAttribute("bds", bds); 87 request.getSession().setAttribute("rs1", rs1); 88 request.getSession().setAttribute("num", num); 89 request.getRequestDispatcher("show.jsp").forward(request, response); 90 // response.sendRedirect(request.getContextPath()+"/show.jsp"); 91 92 } catch (ClassNotFoundException | SQLException e) { 93 // TODO Auto-generated catch block 94 e.printStackTrace(); 95 } 96 97 } 98 99 }
//显示题目
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 7 <title>Insert title here</title> 8 <script type="text/javascript"> 9 function $(id) { 10 return document.getElementById(id); 11 } 12 function check(){ 13 var result = document.getElementsByName('result'); 14 for(var i = 0;i < result.length;i++) 15 { 16 if(result[i].value=="") 17 { 18 $("" + i).innerHTML = "请输入答案"; 19 result[i].focus(); 20 return false; 21 } 22 else{ 23 $("" + i).innerHTML =""; 24 result[i].focus(); 25 } 26 } 27 function init(){ 28 } 29 return true; 30 } 31 </script> 32 </head> 33 <body> 34 35 <h1>请在此处答题：</h1> 36 <hr> 37 <% 38 39 %> 40 <form action="judgeServlet" method="post" onsubmit="return check()"> 41 <table> 42 <% 43 int num=(Integer)request.getSession().getAttribute("num"); 44 String []a=(String[])request.getSession().getAttribute("bds"); 45 for(int i=0;i<num;i++) 46 { 47 %><tr> 48 <td>请作答第<%=i+1 %>道题：</td> 49 <td><%=a[i] %></td> 50 <td><input type="text" name="result" /><span id=<%=i %>></span></td> 51 52 </tr> 53 54 <% 55 } 56 %> 57 <tr> 58 <td><input type="submit" value="交卷"></td> 59 </tr> 60 </table> 61 </form> 62 </body> 63 </html>
1 package servlet; 2 3 import java.io.IOException; 4 import java.io.PrintWriter; 5 import java.sql.SQLException; 6 7 import javax.servlet.ServletConfig; 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 entity.data; 15 import jdbc.insertsj; 16 import util.solve; 17 18 /** 19 * Servlet implementation class judgeServlet 20 */ 21 @WebServlet("/judgeServlet") 22 public class judgeServlet extends HttpServlet { 23 private static final long serialVersionUID = 1L; 24 25 /** 26 * @see HttpServlet#HttpServlet() 27 */ 28 public judgeServlet() { 29 super(); 30 // TODO Auto-generated constructor stub 31 } 32 33 /** 34 * @see Servlet#init(ServletConfig) 35 */ 36 public void init(ServletConfig config) throws ServletException { 37 // TODO Auto-generated method stub 38 } 39 40 /** 41 * @see Servlet#destroy() 42 */ 43 public void destroy() { 44 // TODO Auto-generated method stub 45 } 46 47 /** 48 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) 49 */ 50 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 51 // TODO Auto-generated method stub 52 doPost(request, response); 53 } 54 55 /** 56 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 57 */ 58 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 59 // TODO Auto-generated method stub 60 response.setContentType("text/html;charset=utf-8"); 61 PrintWriter out = response.getWriter(); 62 String []bds =(String[]) request.getSession().getAttribute("bds");//获取表达式 63 String []rs =(String[]) request.getSession().getAttribute("rs1");//获取正确结果 64 String []inputrs = request.getParameterValues("result");//获取输入的结果 65 solve s = new solve(); 66 boolean[]sz = s.judgeIfTrue(rs, inputrs);//判断是否正确 67 int[] idnum = new int[rs.length];//存取题号 68 int[]count = s.zongjie(sz); 69 String[]qiq = s.qiq(sz); 70 String[]count1 = s.countexpression(bds, rs, inputrs, sz); 71 out.println("正确的题数"+count[0]+"<br>"); 72 out.println("错误的题数"+count[1]+"<br>"); 73 out.println(qiq[0]+"<br>"); 74 out.println(qiq[1]+"<br>"); 75 for(int i=0;i<rs.length;i++) 76 { 77 idnum[i]=i+1; 78 out.println(count1[i]+"<br>"); 79 } 80 data []a = new data[rs.length]; 81 for(int i=0;i<rs.length;i++) 82 { 83 a[i] = new data(); 84 a[i].setId(idnum[i]); 85 a[i].setTitleexception(bds[i]); 86 a[i].setResult(rs[i]); 87 a[i].setInputrs(inputrs[i]); 88 a[i].setIftrue(sz[i]); 89 } 90 91 insertsj out1 =new insertsj(); 92 try { 93 out1.cunchu(a); 94 } catch (SQLException e) { 95 // TODO Auto-generated catch block 96 e.printStackTrace(); 97 } 98 // response.sendRedirect(request.getContextPath()+"/showResult.jsp"); 99 // request.getRequestDispatcher("showResult.jsp").forward(request, response); 100 out.print("<a href='choose.jsp'>返回</a>"); 101 102 } 103 104 }
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <h1>历史记录页面</h1> 11 <% 12 request.setCharacterEncoding("utf-8"); 13 response.setCharacterEncoding("utf-8"); 14 String s=(String)request.getSession().getAttribute("s1"); 15 String []s1 = s.split(s); 16 if(s1.length==0) 17 { 18 %>你还没有历史记录<% 19 } 20 else 21 { 22 for(int i=0;i<s1.length;i++) 23 { 24 out.print(s1[i] + "<br>"); 25 } 26 } 27 %> 28 <a href="choose.jsp">返回</a> 29 </body> 30 </html>
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <h1>历史记录页面</h1> 11 <% 12 request.setCharacterEncoding("utf-8"); 13 response.setCharacterEncoding("utf-8"); 14 String s=(String)request.getSession().getAttribute("s1"); 15 String []s1 = s.split(s); 16 if(s1.length==0) 17 { 18 %>你还没有历史记录<% 19 } 20 else 21 { 22 for(int i=0;i<s1.length;i++) 23 { 24 out.print(s1[i] + "<br>"); 25 } 26 } 27 %> 28 <a href="choose.jsp">返回</a> 29 </body> 30 </html>
我把需要用的方法和用调用的参数都已经分好类：
如下图：
entity用来存取实体类，也就是数据库对应的那些参数，一开始写了三个，最后只有一个用上了，内容如下：
1 package entity; 2 3 public class data { 4 private int id;//题号 5 private String titleexception;//表达式 6 private String result;//正确结果 7 private String inputrs;//输入结果 8 private boolean iftrue;//判断对错 9 public data() 10 { 11 12 } 13 public int getId() { 14 return id; 15 } 16 public void setId(int id) { 17 this.id = id; 18 } 19 public String getTitleexception() { 20 return titleexception; 21 } 22 public void setTitleexception(String titleexception) { 23 this.titleexception = titleexception; 24 } 25 public String getResult() { 26 return result; 27 } 28 public void setResult(String result) { 29 this.result = result; 30 } 31 public String getInputrs() { 32 return inputrs; 33 } 34 public void setInputrs(String inputrs) { 35 this.inputrs = inputrs; 36 } 37 public boolean isIftrue() { 38 return iftrue; 39 } 40 public void setIftrue(boolean iftrue) { 41 this.iftrue = iftrue; 42 } 43 44 45 }
第二个是jdbc，也就是连接数据库，查询和插入的方法：
1 package jdbc; 2 3 import java.sql.DriverManager; 4 import java.sql.PreparedStatement; 5 import java.sql.ResultSet; 6 import java.sql.SQLException; 7 8 import com.mysql.jdbc.Connection; 9 import com.mysql.jdbc.Statement; 10 11 import entity.data; 12 13 public class insertsj { 14 public void cunchu(data[]a) throws SQLException 15 { 16 Connection conn = null; 17 PreparedStatement ps = null; 18 ResultSet rs = null; 19 try 20 { 21 conn = (Connection) JdbcUtils.getConnection(); 22 String sql = "insert into wzw3 (idnum,titleexception,result,inputrs,iftrue) values(?,?,?,?,?)"; 23 24 ps = conn.prepareStatement(sql); 25 for(int k=0;k<a.length;k++) 26 { 27 ps.setInt(1, a[k].getId()); 28 ps.setString(2, a[k].getTitleexception()); 29 ps.setString(3, a[k].getResult()); 30 ps.setString(4, a[k].getInputrs()); 31 ps.setBoolean(5, a[k].isIftrue()); 32 ps.executeUpdate(); 33 } 34 } 35 finally 36 { 37 JdbcUtils.free(rs, ps, conn); 38 } 39 40 } 41 42 }
1 package jdbc; 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 import java.sql.Statement; 9 10 public final class JdbcUtils { 11 private static String url = "jdbc:mysql://localhost:3306/wzw1"; 12 private static String user = "wzw1"; 13 private static String password = "121203"; 14 15 private JdbcUtils() 16 {} 17 18 static { 19 try{ 20 Class.forName("com.mysql.jdbc.Driver"); 21 }catch (ClassNotFoundException e) { 22 e.printStackTrace(); 23 } 24 } 25 26 public static Connection getConnection() throws SQLException 27 { 28 return DriverManager.getConnection(url,user,password); 29 } 30 31 public static void free(ResultSet rs, Statement ps, com.mysql.jdbc.Connection conn) throws SQLException { 32 // TODO Auto-generated method stub 33 34 try{ 35 if(rs!=null) 36 { 37 rs.close(); 38 } 39 } 40 catch(SQLException e) 41 { 42 e.printStackTrace(); 43 } 44 finally { 45 try{ 46 if(ps!=null) 47 ps.close(); 48 } 49 catch(SQLException e) 50 { 51 e.printStackTrace(); 52 } 53 finally { 54 if(conn!=null) 55 { 56 conn.close(); 57 } 58 } 59 } 60 61 } 62 63 public static void free(ResultSet rs, PreparedStatement ps, com.mysql.jdbc.Connection conn) throws SQLException { 64 // TODO Auto-generated method stub 65 66 try{ 67 if(rs!=null) 68 { 69 rs.close(); 70 } 71 } 72 catch(SQLException e) 73 { 74 e.printStackTrace(); 75 } 76 finally { 77 try{ 78 if(ps!=null) 79 ps.close(); 80 } 81 catch(SQLException e) 82 { 83 e.printStackTrace(); 84 } 85 finally { 86 if(conn!=null) 87 { 88 conn.close(); 89 } 90 } 91 } 92 93 } 94 }
1 package jdbc; 2 3 import java.sql.PreparedStatement; 4 import java.sql.ResultSet; 5 import java.sql.SQLException; 6 7 import com.mysql.jdbc.Connection; 8 9 public class select { 10 public static String selectbyIdTime() throws SQLException 11 { 12 Connection conn = null; 13 PreparedStatement ps = null; 14 ResultSet rs = null; 15 try{ 16 conn = (Connection) JdbcUtils.getConnection(); 17 String sql="select * from wzw3"; 18 ps = conn.prepareStatement(sql); 19 rs=ps.executeQuery(); 20 String a1 = ""; 21 while(rs.next()) 22 { 23 a1+=rs.getInt("idnum")+rs.getString("titleexception")+rs.getString("result")+rs.getString("inputrs")+rs.getBoolean("iftrue") + "#"; 24 } 25 return a1; 26 } 27 finally 28 { 29 JdbcUtils.free(rs, ps, conn); 30 } 31 } 32 }
第三个是用来相应的servlet，在上面都已经展示过了
第四个是产生题目的方法，跟上一次写的差不多，但是因为太多，我把分成三个Java文件，还有一个是判断所做的体是否正确的方法：
1 package util; 2 3 public class integer { 4 //整数运算 5 public static String generateExpressionkh(int num,int scope)//产生带括号的整数表达式 6 { 7 publicUse u = new publicUse(); 8 int a1[]=new int[num]; 9 int a2[]=new int[num-1]; 10 int a3[]=new int[num]; 11 String[]a5=new String[num]; 12 String[] a4={"+","-","*","/"}; 13 for(int i=0;i<num;i++) 14 { 15 a1[i]=(int) (Math.random()*(scope-1)+1); 16 } 17 for(int i=0;i<num-1;i++) 18 { 19 a2[i]=(int) (Math.random()*4); 20 } 21 a3=u.chansheng(num); 22 for(int i=0;i<num;i++) 23 { 24 a5[i]=""; 25 if(a3[i]<0) 26 { 27 int c=0-a3[i]; 28 for(int j=0;j<c;j++) 29 { 30 a5[i]+=")"; 31 } 32 } 33 else 34 { 35 for(int j=0;j<a3[i];j++) 36 { 37 a5[i]+="("; 38 } 39 } 40 } 41 String t=""; 42 for(int i=0;i<num-1;i++) 43 { 44 if(a3[i]>0) 45 { 46 t+=a5[i]+" "+a1[i]+" "+a4[a2[i]]; 47 } 48 else 49 { 50 t+=" "+a1[i]+" "+a5[i]+a4[a2[i]]; 51 } 52 } 53 if(a3[num-1]>0) 54 { 55 t+=a5[num-1]+" "+a1[num-1]+" "; 56 } 57 else 58 { 59 t+=" "+a1[num-1]+" "+a5[num-1]; 60 } 61 return t; 62 } 63 public static String generationexception(int num,int scope)//产生不带括号的表达式 64 { 65 int a1[]=new int[num]; 66 int a2[]=new int[num-1]; 67 int a3[]=new int[num]; 68 String[] a4={"+","-","*","/"}; 69 for(int i=0;i<num;i++) 70 { 71 a1[i]=(int) (Math.random()*(scope-1)+1); 72 } 73 for(int i=0;i<num-1;i++) 74 { 75 a2[i]=(int) (Math.random()*4); 76 } 77 String t=""; 78 for(int i=0;i<num-1;i++) 79 { 80 if(a3[i]>0) 81 { 82 t+=" "+a1[i]+" "+a4[a2[i]]; 83 } 84 else 85 { 86 t+=" "+a1[i]+" "+a4[a2[i]]; 87 } 88 } 89 if(a3[num-1]>0) 90 { 91 t+=" "+a1[num-1]+" "; 92 } 93 else 94 { 95 t+=" "+a1[num-1]+" "; 96 } 97 return t; 98 } 99 100 }
1 package util; 2 3 public class properFraction { 4 5 //真分数运算 6 public static String properFractionExit(int num,int scope)//产生不含括号含有真分数的表达式 7 { 8 publicUse u =new publicUse(); 9 10 int []r1=new int[2*num];//接受产生的数值 11 int []r2=new int[num-1];//接受符号 12 String[]r3={"+","-","*","/"}; 13 14 String rs="";//接受含括号的和不含括号的表达式 15 char ch='z'; 16 while(ch=='z') 17 { 18 int i=0; 19 for(;i<2*num;i++) 20 { 21 r1[i]=(int) (Math.random()*(scope-1)+1); 22 } 23 ch='y'; 24 int j=0; 25 while(j<2*num) 26 { 27 if(r1[j]>=r1[j+1]) 28 { 29 ch='z'; 30 break; 31 } 32 j++; 33 j++; 34 } 35 } 36 for(int i=0;i<num-1;i++) 37 { 38 r2[i]=(int) (Math.random()*4); 39 } 40 int j=0; 41 while(j<2*num-2) 42 { 43 44 int commondivisor=u.maxyue(r1[j], r1[j+1]); 45 r1[j]/=commondivisor; 46 r1[j+1]/=commondivisor; 47 if(r1[j]==r1[j+1]) 48 { 49 rs+=" "+1+" "; 50 } 51 else 52 { 53 rs+=" "+r1[j]+"/"+r1[j+1]+" "+r3[r2[(j+1)/2]]; 54 } 55 j++; 56 j++; 57 } 58 int commondivisor1=u.maxyue(r1[2*num-2],r1[2*num-1]); 59 r1[2*num-2]/=commondivisor1; 60 r1[2*num-1]/=commondivisor1; 61 if(r1[2*num-2]==r1[2*num-1]) 62 { 63 rs+=" "+1+" "; 64 } 65 else 66 { 67 rs+=" "+r1[2*num-2]+"/"+r1[2*num-1]+" "; 68 } 69 return rs; 70 } 71 public static String properFractionExithk(int num,int scope)//产生含括号含有真分数的表达式 72 { 73 publicUse u =new publicUse(); 74 75 int []r1=new int[2*num];//接受产生的数值 76 int []r2=new int[num-1];//接受符号 77 String[]r3={"+","-","*","/"}; 78 int []r4=new int[num];//接受随机产生的括号 79 String []r5=new String[2*num];//将接受的括号的个数，转成字符串 80 String rs="";//接受含括号的和不含括号的表达式 81 r4=u.chansheng(num); 82 char ch='z'; 83 84 //产生数值 85 while(ch=='z') 86 { 87 88 for(int i=0;i<2*num;i++) 89 { 90 r1[i]=(int) (Math.random()*(scope-1)+1); 91 } 92 ch='y'; 93 int j=0; 94 while(j<2*num) 95 { 96 if(r1[j]>=r1[j+1]) 97 { 98 ch='z'; 99 break; 100 } 101 j++; 102 j++; 103 } 104 } 105 106 107 //产生符号 108 for(int i=0;i<num-1;i++) 109 { 110 r2[i]=(int) (Math.random()*4); 111 } 112 113 114 //产生括号的数组 115 for(int i=0;i<2*num;i++) 116 { 117 r5[i]=""; 118 if(i%2==0) 119 { 120 if(r4[i/2]>0) 121 { 122 for(int j=0;j<r4[i/2];j++) 123 { 124 r5[i]+="("; 125 } 126 } 127 else if(r4[i/2]<0) 128 { 129 for(int j=0;j<0-r4[i/2];j++) 130 { 131 r5[i]+=")"; 132 } 133 } 134 } 135 } 136 137 //添加到一个String类型的表达式中 138 int j=0; 139 while(j<2*num-2) 140 { 141 int commondivisor=u.maxyue(r1[j], r1[j+1]); 142 r1[j]/=commondivisor; 143 r1[j+1]/=commondivisor; 144 if(r5[j].equals("")) 145 { 146 rs+=" "+r1[j]+"/"+r1[j+1]+" "+r3[r2[(j+1)/2]]; 147 } 148 else if(r5[j].substring(0, 1).equals("(")) 149 { 150 rs+=r5[j]+" "+r1[j]+"/"+r1[j+1]+" "+r3[r2[(j+1)/2]]; 151 } 152 else 153 { 154 rs+=" "+r1[j]+"/"+r1[j+1]+" "+r5[j]+r3[r2[(j+1)/2]]; 155 } 156 157 j++; 158 j++; 159 } 160 //算最后一个数 161 int commondivisor1=u.maxyue(r1[2*num-2],r1[2*num-1]); 162 r1[2*num-2]/=commondivisor1; 163 r1[2*num-1]/=commondivisor1; 164 165 if(r5[2*num-2].equals("")) 166 { 167 rs+=" "+r1[2*num-2]+"/"+r1[2*num-1]+" "; 168 } 169 else if(r5[2*num-2].substring(0, 1).equals("(")) 170 { 171 rs+=r5[2*num-2]+" "+r1[2*num-2]+"/"+r1[2*num-1]+" "; 172 } 173 else 174 { 175 rs+=" "+r1[2*num-2]+"/"+r1[2*num-1]+" "+r5[2*num-2]; 176 } 177 return rs; 178 } 179 180 }
1 package util; 2 3 import java.sql.SQLException; 4 import java.util.Date; 5 import java.util.Random; 6 import java.util.Scanner; 7 import java.util.Stack; 8 9 public class publicUse { 10 // public static void main(String[] args) throws ClassNotFoundException, SQLException 11 // { 12 // 13 // System.out.println("请选择题目类型：1.真分数。2整数"); 14 // int choose1=sc.nextInt(); 15 // System.out.println("请输入产生题的个数"); 16 // int num=sc.nextInt(); 17 // System.out.println("请输入取值范围"); 18 // int scope=sc.nextInt(); 19 // System.out.println("请选择题目类型中是否有括号：1.有。2.没有"); 20 // int choose2=sc.nextInt(); 21 // String rs[]=new String[2*num]; 22 // rs=operationAndStatistical(choose1, choose2, num,scope); 23 // for(int i=0;i<num;i++) 24 // { 25 // System.out.println(rs[i]+"="+rs[i+num]); 26 // } 27 // } 28 29 public static Scanner sc=new Scanner(System.in); 30 31 //真分数和整数都需要用到 32 public static int maxyue(int y,int x)//最大公约数 33 { 34 int r=y; 35 while(r!=0) 36 { 37 r=x%y; 38 x=y; 39 y=r; 40 } 41 return x; 42 } 43 public static char youxian(String f,String s)//计算两个符号的优先级 44 { 45 char a1[][]={ 46 {'>','>','<','<','<','>','>'}, 47 {'>','>','<','<','<','>','>'}, 48 {'>','>','>','>','<','>','>'}, 49 {'>','>','>','>','<','>','>'}, 50 {'<','<','<','<','<','=',' '}, 51 {'>','>','>','>',' ','>','>'}, 52 {'<','<','<','<','<',' ','='} 53 }; 54 String a="+-*/()#"; 55 int a11=a.indexOf(f); 56 int a12=a.indexOf(s); 57 return a1[a11][a12]; 58 } 59 static int [] chansheng(int num)//随机产生括号 60 { 61 int []b=new int[num]; 62 for(int i=0;i<b.length;i++) 63 { 64 b[i]=0; 65 } 66 Random rd=new Random(); 67 for(int i=2;i<num;i++) 68 { 69 for(int j=0;j<num-i+1;j++) 70 { 71 int t=rd.nextInt(2); 72 if(t==1) 73 { 74 if(b[j]>=0&&b[j+i-1]<=0) 75 { 76 int c=0; 77 for(int k=j;k<j+i;k++) 78 { 79 c+=b[k]; 80 } 81 if(c==0) 82 { 83 b[j]++; 84 b[j+i-1]--; 85 } 86 } 87 88 } 89 } 90 } 91 return b; 92 } 93 //运算 94 public static String jisuanbh(String a)//表达式的运算 95 { 96 Stack <String>num=new Stack <String>(); 97 Stack <String>fuhao=new Stack<String>(); 98 a+="#"; 99 fuhao.push("#"); 100 char ch; 101 int i=0; 102 int s=0; 103 int y=0; 104 ch=a.charAt(i); 105 while(!(ch+"").equals("#") || !fuhao.peek().equals("#")) 106 { 107 if(ch==' ')//如果遇到字符为空，说明遇到数字 108 { 109 String rn="";//用来记录数据 110 while(true) 111 { 112 ch=a.charAt(++i); 113 if(ch==' ') 114 { 115 break; 116 } 117 rn+=ch; 118 } 119 if((i+1)<a.length()){ 120 ch=a.charAt(++i); 121 } 122 num.push(rn); 123 } 124 else//遇到的是字符 125 { 126 char comp=youxian(fuhao.peek(),ch+"");//比较两个字符的优先级 127 if(comp=='='){//说明遇到右括号 128 fuhao.pop(); 129 if((i+1)<a.length()){ 130 ch=a.charAt(++i); 131 } 132 } 133 else if(comp=='>')//优先级高，弹出两个数和一个运算符，进行运算 134 { 135 String st1=num.pop(); 136 String st2=num.pop(); 137 String fuh1=fuhao.pop(); 138 char fuh2=fuh1.charAt(0);//将String类型转为char类型 139 String []rs1=new String[2]; 140 rs1=yunsuan2(st2, st1, fuh1); 141 if(rs1[1].equals("error"))//如果运算中有问题，就结束运算 142 { 143 return "error"; 144 } 145 else 146 { 147 num.push(rs1[0]+"");//将两数结果压入栈中 148 } 149 } 150 else//优先级比较低，把运算符压入栈中 151 { 152 fuhao.push(ch+""); 153 if((i+1)<a.length()) 154 { 155 ch=a.charAt(++i); 156 } 157 } 158 } 159 } 160 String rs=num.pop(); 161 int wz=rs.indexOf("/"); 162 if(wz!=-1) 163 { 164 String fb=rs.substring(0, wz); 165 String sb=rs.substring(wz+1,rs.length()); 166 int fb1=Integer.parseInt(fb); 167 int sb1=Integer.parseInt(sb); 168 if(fb1>=sb1&&fb1%sb1==0) 169 { 170 171 rs=(fb1/sb1)+""; 172 } 173 else if(fb1<sb1&&fb1%sb1!=0) 174 { 175 int commondivisor=maxyue(fb1, sb1); 176 fb1/=commondivisor; 177 sb1/=commondivisor; 178 rs=fb1+"/"+sb1; 179 } 180 else 181 { 182 int commondivisor=maxyue(fb1, sb1); 183 fb1/=commondivisor; 184 sb1/=commondivisor; 185 rs=(fb1/sb1)+"'"+(fb1%sb1)+"/"+sb1; 186 } 187 } 188 return rs; 189 } 190 public static String[] tys(String fn,String sn,char c)//两个整数的运算 191 { 192 int a=Integer.parseInt(fn); 193 int b=Integer.parseInt(sn); 194 String []a1=new String [2];//a1[0]用来记录两数运算结果，a1[1]用来记录两数能否继续算下去 195 a1[0]=a1[1]=""; 196 int d=0;//d用来短暂存取两数运算结果 197 int z=0;//除法中判断a1[0]是否需要加上d 198 if(c=='+') 199 { 200 d=a+b; 201 } 202 else if(c=='-') 203 { 204 if(a<b) 205 { 206 a1[1]="error"; 207 return a1; 208 } 209 else 210 { 211 d=a-b; 212 } 213 } 214 else if(c=='*') 215 { 216 d=a*b; 217 } 218 219 else 220 { 221 if(a%b==0&&a>=b) 222 { 223 d=a/b; 224 } 225 else 226 { 227 z=1; 228 a1[0]=a+"/"+b; 229 } 230 } 231 if(z==0) 232 { 233 a1[0] = d+""; 234 } 235 return a1; 236 } 237 public static String[] yunsuan2(String fn,String sn,String e)//两个数运算，分数，整数均可 238 { 239 String rs[]=new String[2]; 240 rs[0]=rs[1]=""; 241 int location1=fn.indexOf("/"); 242 int location2=sn.indexOf("/"); 243 if(location1==-1&&location2==-1)//两个整数的运算 244 { 245 rs=tys(fn, sn, e.charAt(0)); 246 } 247 else{ 248 int a=0; 249 int b=0; 250 int c=0; 251 int d=0; 252 if(location1!=-1&&location2!=-1)//两个数都为真分数 253 { 254 String r1=fn.substring(0,location1); 255 String r2=fn.substring(location1+1,fn.length()); 256 String r3=sn.substring(0,location2); 257 String r4=sn.substring(location2+1,sn.length()); 258 a=Integer.parseInt(r1); 259 b=Integer.parseInt(r2); 260 c=Integer.parseInt(r3); 261 d=Integer.parseInt(r4); 262 } 263 else 264 { 265 if(location1==-1) 266 { 267 a=Integer.parseInt(fn); 268 b=1; 269 String r3=sn.substring(0,location2); 270 String r4=sn.substring(location2+1,sn.length()); 271 c=Integer.parseInt(r3); 272 d=Integer.parseInt(r4); 273 } 274 else 275 { 276 c=Integer.parseInt(sn); 277 d=1; 278 String r1=fn.substring(0,location1); 279 String r2=fn.substring(location1+1,fn.length()); 280 a=Integer.parseInt(r1); 281 b=Integer.parseInt(r2); 282 } 283 } 284 int f=0,g=0,h=0,t=0; 285 if(e.equals("+")) 286 { 287 if(b==d) 288 { 289 f=a+c; 290 g=b; 291 } 292 else 293 { 294 g=b*d/maxyue(b,d); 295 a=g/b*a; 296 c=g/d*c; 297 f=a+c; 298 } 299 } 300 else if(e.equals("-")) 301 { 302 if(b==d) 303 { 304 f=a-c; 305 if(f<=0) 306 { 307 rs[1]="error"; 308 return rs; 309 } 310 g=b; 311 } 312 else 313 { 314 g=b*d/maxyue(b,d); 315 a=g/b*a; 316 c=g/d*c; 317 f=a-c; 318 if(f<0) 319 { 320 rs[1]="error"; 321 return rs; 322 } 323 } 324 } 325 else if(e.equals("*")) 326 { 327 f=a*c; 328 g=b*d; 329 } 330 else 331 { 332 f=a*d; 333 g=b*c; 334 } 335 rs[0]=f+"/"+g; 336 337 } 338 339 return rs; 340 } 341 public static String[] operationAndStatistical(int ch1,int ch2,int num,int scope) throws ClassNotFoundException, SQLException//对结果进行操作并统计题数 342 { 343 properFraction p =new properFraction(); 344 integer i1= new integer(); 345 String rs=""; 346 int i=0; 347 String saveexcep[]=new String[2*num]; 348 while(i<num) 349 { 350 int n=(int) (Math.random()*3+2); 351 if(ch1==1&&ch2==1) 352 { 353 rs=p.properFractionExithk(n,scope);//产生含有括号的真分数表达式 354 } 355 else if(ch1==1&&ch2==2) 356 { 357 rs=p.properFractionExit(n,scope);//产生不含括号的真分数表达式 358 } 359 else if(ch1==2&&ch2==1) 360 { 361 rs=i1.generateExpressionkh(n,scope);//产生含括号的整数表达式 362 } 363 else 364 { 365 rs=i1.generationexception(n,scope);//产生不含括号的整数表达式 366 } 367 String judgers=jisuanbh(rs);//记录答案 368 369 if(judgers.equals("error")) 370 { 371 System.out.print(""); 372 } 373 else 374 { 375 saveexcep[i]=rs; 376 saveexcep[i+num]=judgers; 377 i++; 378 } 379 } 380 return saveexcep; 381 } 382 383 }
1 package util; 2 3 public class solve { 4 public boolean[] judgeIfTrue(String[] a,String[] b)//对传过来的两个数组进行比较，正确的数对应1返回 5 { 6 boolean judgers[] = new boolean [a.length]; 7 for(int i=0;i<a.length;i++) 8 { 9 judgers[i]=false; 10 if(a[i].equals(b[i])) 11 { 12 judgers[i]=true; 13 } 14 } 15 16 return judgers; 17 } 18 public int[] zongjie(boolean[] judeger) 19 { 20 21 int[] statisticaltrue = new int[2];//用来计算正确和错误的题数 22 statisticaltrue[0]=0; 23 statisticaltrue[1]=0;//初始化 24 for(int i=0;i<judeger.length;i++) 25 { 26 if(judeger[i]==true) 27 { 28 statisticaltrue[0]+=1; 29 } 30 else 31 { 32 statisticaltrue[1]+=1; 33 } 34 } 35 return statisticaltrue; 36 } 37 public String[] qiq (boolean []judgers) 38 { 39 String []rs =new String[2];//分别用来记录正确和错误的题号 40 rs[0]="正确的题目题号如下:"; 41 rs[1]="错误的题目题号如下:"; 42 for(int i=0;i<judgers.length;i++) 43 { 44 if(judgers[i]==true) 45 { 46 rs[0]+=(i+1)+" "; 47 } 48 else 49 { 50 rs[1]+=(i+1)+" "; 51 } 52 } 53 return rs; 54 } 55 public String[]countexpression(String[]bds,String[]correctrs,String[]inputrs, boolean[]judgers) 56 { 57 String[]count1 = new String[judgers.length]; 58 for(int i=0;i<judgers.length;i++) 59 { 60 if(judgers[i]==true) 61 { 62 count1[i]="第"+(i+1)+"道题: "+bds[i]+"="+correctrs[i]+" "+"回答正确"; 63 64 } 65 else 66 { 67 count1[i]="第"+(i+1)+"道题: "+bds[i]+"="+inputrs[i]+" "+"回答错误，"+"正确答案是"+correctrs[i]; 68 69 } 70 } 71 return count1; 72 } 73 }
4.结果截图：
（1）选择查看还是做题
（2）选择做题：
（3）做题：
（4）判断正确：
查询历史记录：
这个查询界面做的还不算完善，后面会进行改进。。。
在其中加入了js的基本的判空
5.实验总结：通过对这个简单的程序的编写，能基本的使用jsp Javabean和servlet来实现一个最小的网页版的程序，在通过链接数据库，使用jdbc技术实现数据的存储和查询，
这是我对MVC框架有了一个更加深刻的认识，在通过加入js，是这个程序更加符合人们的需求，虽然我现在只是用了这个的皮毛，但是我以后越来越熟练地掌握，另外，我还准备
加上jquare和ajax来使界面更加合理，我会使我这个程序更加完善。
6.合作感受：两个人一起写时跟一个写是不一样的，我比较熟悉整体的结构，他比较细心，再设计页面和找错误方面比较擅长，通过这次练习找到我们自己的不足之处，我们
收货到了更多。
程序完成者： 王志伟 胡洋洋