结对四则运算04—网页版
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
<%@ 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>
<h1>请选择是做题还是查询历史记录</h1>
<hr>
<br>
<br>
<br>
<a href="setParam.jsp"><input type="button" value="开始做题"></a>
<a href="selectServlet"><input type="button" value="查询历史记录"></a>
</body>
</html>
//设置参数，比如是否要括号，做真分数还是整数等等
<%@ 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">
<style>
span {
color:blue;
}
</style>
<script type="text/javascript">
$(function()
{
$('#formbackground').height($(window).height());
$('#formbackground').width($(window).width());
}
);
</script>
<script type="text/javascript">
function $(id)
{
return document.getElementById(id);
}
function check() {
var num=$("num").value;
var scope=$("scope").value;
$("numinfo").innerHTML="";
$("scopeinfo").innerHTML="";
if(num=="")
{
$("numinfo").innerHTML="题数不能为空，请输入题数";
$("num").focus();
return false;
}
if(scope=="")
{
$("scopeinfo").innerHTML="取值范围不能为空，请输入范围";
$("scope").focus();
return false;
}
return true;
}
</script>
<title>Insert title here</title>
</head>
<body>
<h1>请选择做题的类型</h1>
<br>
<form action="setParamServlet" method="post" onsubmit="return check()">
<table>
<tr>
<td>类型：</td>
<td>整数<input type="radio" name="type" value="2" checked="checked"></td>
<td>真分数<input type="radio" name="type" value="1"></td>
</tr>
<tr>
<td>题数：</td>
<td><input type="text" name="num" id="num"><span id="numinfo"></span></td>
</tr>
<tr>
<td>取值范围：</td>
<td><input type="text" name="scope" id="scope"><span id="scopeinfo"></span></td>
</tr>
<tr>
<td>是否含有括号</td>
<td>无<input type="radio" name="isBracket" value="2" checked="checked"></td>
<td>有<input type="radio" name="isBracket" value="1"></td>
</tr>
<tr>
<td><input type="submit" value="确认"> <input type="reset" value="取消"></td>
</tr>
</table>
</form>
</body>
</html>
设置参数jsp
//产生题目的servlet
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import util.publicUse;
/**
* Servlet implementation class setParamServlet
*/
@WebServlet("/setParamServlet")
public class setParamServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public setParamServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
// TODO Auto-generated method stub
}
/**
* @see Servlet#destroy()
*/
public void destroy() {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
// TODO Auto-generated method stub
publicUse P = new publicUse();
response.setContentType("text/html;charset=utf-8");
String type;//题目类型
int num;//题数
int scope;//范围
String isBracket;//是否含有括号
type=request.getParameter("type");
num=Integer.parseInt(request.getParameter("num"));
scope=Integer.parseInt(request.getParameter("scope"));
isBracket=request.getParameter("isBracket");
PrintWriter out = response.getWriter();
System.out.println(type+"\t"+num+"\t"+scope+"\t"+isBracket);
int choose1=Integer.parseInt(type);
int choose2=Integer.parseInt(isBracket);
try {
String rs[]=new String[2*num];
rs=P.operationAndStatistical(choose1, choose2, num,scope);
String []bds = new String[num];//存取表达式
String []rs1 = new String[num];//存取结果
for(int i=0;i<num;i++)
{
bds[i] = rs[i];
rs1[i] = rs[i + num];
}
request.getSession().setAttribute("bds", bds);
request.getSession().setAttribute("rs1", rs1);
request.getSession().setAttribute("num", num);
request.getRequestDispatcher("show.jsp").forward(request, response);
// response.sendRedirect(request.getContextPath()+"/show.jsp");
} catch (ClassNotFoundException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
产生题目的servlet
//显示题目
<%@ 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> <script type="text/javascript"> function $(id) { return document.getElementById(id); } function check(){ var result = document.getElementsByName('result'); for(var i = 0;i < result.length;i++) { if(result[i].value=="") { $("" + i).innerHTML = "请输入答案"; result[i].focus(); return false; } else{ $("" + i).innerHTML =""; result[i].focus(); } } function init(){ } return true; } </script> </head> <body> <h1>请在此处答题：</h1> <hr> <% %> <form action="judgeServlet" method="post" onsubmit="return check()"> <table> <% int num=(Integer)request.getSession().getAttribute("num"); String []a=(String[])request.getSession().getAttribute("bds"); for(int i=0;i<num;i++) { %><tr> <td>请作答第<%=i+1 %>道题：</td> <td><%=a[i] %></td> <td><input type="text" name="result" /><span id=<%=i %>></span></td> </tr> <% } %> <tr> <td><input type="submit" value="交卷"></td> </tr> </table> </form> </body> </html> 做题页面jsp
package servlet; import java.io.IOException; import java.io.PrintWriter; import java.sql.SQLException; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import entity.data; import jdbc.insertsj; import util.solve; /** * Servlet implementation class judgeServlet */ @WebServlet("/judgeServlet") public class judgeServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public judgeServlet() { super(); // TODO Auto-generated constructor stub } /** * @see Servlet#init(ServletConfig) */ public void init(ServletConfig config) throws ServletException { // TODO Auto-generated method stub } /** * @see Servlet#destroy() */ public void destroy() { // TODO Auto-generated method stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request, response); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub response.setContentType("text/html;charset=utf-8"); PrintWriter out = response.getWriter(); String []bds =(String[]) request.getSession().getAttribute("bds");//获取表达式 String []rs =(String[]) request.getSession().getAttribute("rs1");//获取正确结果 String []inputrs = request.getParameterValues("result");//获取输入的结果 solve s = new solve(); boolean[]sz = s.judgeIfTrue(rs, inputrs);//判断是否正确 int[] idnum = new int[rs.length];//存取题号 int[]count = s.zongjie(sz); String[]qiq = s.qiq(sz); String[]count1 = s.countexpression(bds, rs, inputrs, sz); out.println("正确的题数"+count[0]+"<br>"); out.println("错误的题数"+count[1]+"<br>"); out.println(qiq[0]+"<br>"); out.println(qiq[1]+"<br>"); for(int i=0;i<rs.length;i++) { idnum[i]=i+1; out.println(count1[i]+"<br>"); } data []a = new data[rs.length]; for(int i=0;i<rs.length;i++) { a[i] = new data(); a[i].setId(idnum[i]); a[i].setTitleexception(bds[i]); a[i].setResult(rs[i]); a[i].setInputrs(inputrs[i]); a[i].setIftrue(sz[i]); } insertsj out1 =new insertsj(); try { out1.cunchu(a); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } // response.sendRedirect(request.getContextPath()+"/showResult.jsp"); // request.getRequestDispatcher("showResult.jsp").forward(request, response); out.print("<a href='choose.jsp'>返回</a>"); } } 判断是否正确，并将结果输出的servlet和和讲题目存档
package servlet; import java.io.IOException; import java.io.PrintWriter; import java.sql.SQLException; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import entity.data; import jdbc.insertsj; import util.solve; /** * Servlet implementation class judgeServlet */ @WebServlet("/judgeServlet") public class judgeServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public judgeServlet() { super(); // TODO Auto-generated constructor stub } /** * @see Servlet#init(ServletConfig) */ public void init(ServletConfig config) throws ServletException { // TODO Auto-generated method stub } /** * @see Servlet#destroy() */ public void destroy() { // TODO Auto-generated method stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request, response); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub response.setContentType("text/html;charset=utf-8"); PrintWriter out = response.getWriter(); String []bds =(String[]) request.getSession().getAttribute("bds");//获取表达式 String []rs =(String[]) request.getSession().getAttribute("rs1");//获取正确结果 String []inputrs = request.getParameterValues("result");//获取输入的结果 solve s = new solve(); boolean[]sz = s.judgeIfTrue(rs, inputrs);//判断是否正确 int[] idnum = new int[rs.length];//存取题号 int[]count = s.zongjie(sz); String[]qiq = s.qiq(sz); String[]count1 = s.countexpression(bds, rs, inputrs, sz); out.println("正确的题数"+count[0]+"<br>"); out.println("错误的题数"+count[1]+"<br>"); out.println(qiq[0]+"<br>"); out.println(qiq[1]+"<br>"); for(int i=0;i<rs.length;i++) { idnum[i]=i+1; out.println(count1[i]+"<br>"); } data []a = new data[rs.length]; for(int i=0;i<rs.length;i++) { a[i] = new data(); a[i].setId(idnum[i]); a[i].setTitleexception(bds[i]); a[i].setResult(rs[i]); a[i].setInputrs(inputrs[i]); a[i].setIftrue(sz[i]); } insertsj out1 =new insertsj(); try { out1.cunchu(a); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } // response.sendRedirect(request.getContextPath()+"/showResult.jsp"); // request.getRequestDispatcher("showResult.jsp").forward(request, response); out.print("<a href='choose.jsp'>返回</a>"); } } 判断是否正确，并将结果输出的servlet和和讲题目存档
<%@ 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> <h1>历史记录页面</h1> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); String s=(String)request.getSession().getAttribute("s1"); String []s1 = s.split(s); if(s1.length==0) { %>你还没有历史记录<% } else { for(int i=0;i<s1.length;i++) { out.print(s1[i] + "<br>"); } } %> <a href="choose.jsp">返回</a> </body> </html> 显示做题记录的jsp
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：
package entity; public class data { private int id;//题号 private String titleexception;//表达式 private String result;//正确结果 private String inputrs;//输入结果 private boolean iftrue;//判断对错 public data() { } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getTitleexception() { return titleexception; } public void setTitleexception(String titleexception) { this.titleexception = titleexception; } public String getResult() { return result; } public void setResult(String result) { this.result = result; } public String getInputrs() { return inputrs; } public void setInputrs(String inputrs) { this.inputrs = inputrs; } public boolean isIftrue() { return iftrue; } public void setIftrue(boolean iftrue) { this.iftrue = iftrue; } } entity
第二个是jdbc，也就是连接数据库，查询和插入的方法：
package jdbc; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import com.mysql.jdbc.Connection; import com.mysql.jdbc.Statement; import entity.data; public class insertsj { public void cunchu(data[]a) throws SQLException { Connection conn = null; PreparedStatement ps = null; ResultSet rs = null; try { conn = (Connection) JdbcUtils.getConnection(); String sql = "insert into wzw3 (idnum,titleexception,result,inputrs,iftrue) values(?,?,?,?,?)"; ps = conn.prepareStatement(sql); for(int k=0;k<a.length;k++) { ps.setInt(1, a[k].getId()); ps.setString(2, a[k].getTitleexception()); ps.setString(3, a[k].getResult()); ps.setString(4, a[k].getInputrs()); ps.setBoolean(5, a[k].isIftrue()); ps.executeUpdate(); } } finally { JdbcUtils.free(rs, ps, conn); } } } 插入的
package jdbc; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public final class JdbcUtils { private static String url = "jdbc:mysql://localhost:3306/wzw1"; private static String user = "wzw1"; private static String password = "121203"; private JdbcUtils() {} static { try{ Class.forName("com.mysql.jdbc.Driver"); }catch (ClassNotFoundException e) { e.printStackTrace(); } } public static Connection getConnection() throws SQLException { return DriverManager.getConnection(url,user,password); } public static void free(ResultSet rs, Statement ps, com.mysql.jdbc.Connection conn) throws SQLException { // TODO Auto-generated method stub try{ if(rs!=null) { rs.close(); } } catch(SQLException e) { e.printStackTrace(); } finally { try{ if(ps!=null) ps.close(); } catch(SQLException e) { e.printStackTrace(); } finally { if(conn!=null) { conn.close(); } } } } public static void free(ResultSet rs, PreparedStatement ps, com.mysql.jdbc.Connection conn) throws SQLException { // TODO Auto-generated method stub try{ if(rs!=null) { rs.close(); } } catch(SQLException e) { e.printStackTrace(); } finally { try{ if(ps!=null) ps.close(); } catch(SQLException e) { e.printStackTrace(); } finally { if(conn!=null) { conn.close(); } } } } } jdbc连接的工具类
package jdbc; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import com.mysql.jdbc.Connection; public class select { public static String selectbyIdTime() throws SQLException { Connection conn = null; PreparedStatement ps = null; ResultSet rs = null; try{ conn = (Connection) JdbcUtils.getConnection(); String sql="select * from wzw3"; ps = conn.prepareStatement(sql); rs=ps.executeQuery(); String a1 = ""; while(rs.next()) { a1+=rs.getInt("idnum")+rs.getString("titleexception")+rs.getString("result")+rs.getString("inputrs")+rs.getBoolean("iftrue") + "#"; } return a1; } finally { JdbcUtils.free(rs, ps, conn); } } } 查询
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：
package util; public class integer { //整数运算 public static String generateExpressionkh(int num,int scope)//产生带括号的整数表达式 { publicUse u = new publicUse(); int a1[]=new int[num]; int a2[]=new int[num-1]; int a3[]=new int[num]; String[]a5=new String[num]; String[] a4={"+","-","*","/"}; for(int i=0;i<num;i++) { a1[i]=(int) (Math.random()*(scope-1)+1); } for(int i=0;i<num-1;i++) { a2[i]=(int) (Math.random()*4); } a3=u.chansheng(num); for(int i=0;i<num;i++) { a5[i]=""; if(a3[i]<0) { int c=0-a3[i]; for(int j=0;j<c;j++) { a5[i]+=")"; } } else { for(int j=0;j<a3[i];j++) { a5[i]+="("; } } } String t=""; for(int i=0;i<num-1;i++) { if(a3[i]>0) { t+=a5[i]+" "+a1[i]+" "+a4[a2[i]]; } else { t+=" "+a1[i]+" "+a5[i]+a4[a2[i]]; } } if(a3[num-1]>0) { t+=a5[num-1]+" "+a1[num-1]+" "; } else { t+=" "+a1[num-1]+" "+a5[num-1]; } return t; } public static String generationexception(int num,int scope)//产生不带括号的表达式 { int a1[]=new int[num]; int a2[]=new int[num-1]; int a3[]=new int[num]; String[] a4={"+","-","*","/"}; for(int i=0;i<num;i++) { a1[i]=(int) (Math.random()*(scope-1)+1); } for(int i=0;i<num-1;i++) { a2[i]=(int) (Math.random()*4); } String t=""; for(int i=0;i<num-1;i++) { if(a3[i]>0) { t+=" "+a1[i]+" "+a4[a2[i]]; } else { t+=" "+a1[i]+" "+a4[a2[i]]; } } if(a3[num-1]>0) { t+=" "+a1[num-1]+" "; } else { t+=" "+a1[num-1]+" "; } return t; } } 产生整数的题目
package util; public class properFraction { //真分数运算 public static String properFractionExit(int num,int scope)//产生不含括号含有真分数的表达式 { publicUse u =new publicUse(); int []r1=new int[2*num];//接受产生的数值 int []r2=new int[num-1];//接受符号 String[]r3={"+","-","*","/"}; String rs="";//接受含括号的和不含括号的表达式 char ch='z'; while(ch=='z') { int i=0; for(;i<2*num;i++) { r1[i]=(int) (Math.random()*(scope-1)+1); } ch='y'; int j=0; while(j<2*num) { if(r1[j]>=r1[j+1]) { ch='z'; break; } j++; j++; } } for(int i=0;i<num-1;i++) { r2[i]=(int) (Math.random()*4); } int j=0; while(j<2*num-2) { int commondivisor=u.maxyue(r1[j], r1[j+1]); r1[j]/=commondivisor; r1[j+1]/=commondivisor; if(r1[j]==r1[j+1]) { rs+=" "+1+" "; } else { rs+=" "+r1[j]+"/"+r1[j+1]+" "+r3[r2[(j+1)/2]]; } j++; j++; } int commondivisor1=u.maxyue(r1[2*num-2],r1[2*num-1]); r1[2*num-2]/=commondivisor1; r1[2*num-1]/=commondivisor1; if(r1[2*num-2]==r1[2*num-1]) { rs+=" "+1+" "; } else { rs+=" "+r1[2*num-2]+"/"+r1[2*num-1]+" "; } return rs; } public static String properFractionExithk(int num,int scope)//产生含括号含有真分数的表达式 { publicUse u =new publicUse(); int []r1=new int[2*num];//接受产生的数值 int []r2=new int[num-1];//接受符号 String[]r3={"+","-","*","/"}; int []r4=new int[num];//接受随机产生的括号 String []r5=new String[2*num];//将接受的括号的个数，转成字符串 String rs="";//接受含括号的和不含括号的表达式 r4=u.chansheng(num); char ch='z'; //产生数值 while(ch=='z') { for(int i=0;i<2*num;i++) { r1[i]=(int) (Math.random()*(scope-1)+1); } ch='y'; int j=0; while(j<2*num) { if(r1[j]>=r1[j+1]) { ch='z'; break; } j++; j++; } } //产生符号 for(int i=0;i<num-1;i++) { r2[i]=(int) (Math.random()*4); } //产生括号的数组 for(int i=0;i<2*num;i++) { r5[i]=""; if(i%2==0) { if(r4[i/2]>0) { for(int j=0;j<r4[i/2];j++) { r5[i]+="("; } } else if(r4[i/2]<0) { for(int j=0;j<0-r4[i/2];j++) { r5[i]+=")"; } } } } //添加到一个String类型的表达式中 int j=0; while(j<2*num-2) { int commondivisor=u.maxyue(r1[j], r1[j+1]); r1[j]/=commondivisor; r1[j+1]/=commondivisor; if(r5[j].equals("")) { rs+=" "+r1[j]+"/"+r1[j+1]+" "+r3[r2[(j+1)/2]]; } else if(r5[j].substring(0, 1).equals("(")) { rs+=r5[j]+" "+r1[j]+"/"+r1[j+1]+" "+r3[r2[(j+1)/2]]; } else { rs+=" "+r1[j]+"/"+r1[j+1]+" "+r5[j]+r3[r2[(j+1)/2]]; } j++; j++; } //算最后一个数 int commondivisor1=u.maxyue(r1[2*num-2],r1[2*num-1]); r1[2*num-2]/=commondivisor1; r1[2*num-1]/=commondivisor1; if(r5[2*num-2].equals("")) { rs+=" "+r1[2*num-2]+"/"+r1[2*num-1]+" "; } else if(r5[2*num-2].substring(0, 1).equals("(")) { rs+=r5[2*num-2]+" "+r1[2*num-2]+"/"+r1[2*num-1]+" "; } else { rs+=" "+r1[2*num-2]+"/"+r1[2*num-1]+" "+r5[2*num-2]; } return rs; } } 产生真分书类型的题目
package util; import java.sql.SQLException; import java.util.Date; import java.util.Random; import java.util.Scanner; import java.util.Stack; public class publicUse { // public static void main(String[] args) throws ClassNotFoundException, SQLException // { // // System.out.println("请选择题目类型：1.真分数。2整数"); // int choose1=sc.nextInt(); // System.out.println("请输入产生题的个数"); // int num=sc.nextInt(); // System.out.println("请输入取值范围"); // int scope=sc.nextInt(); // System.out.println("请选择题目类型中是否有括号：1.有。2.没有"); // int choose2=sc.nextInt(); // String rs[]=new String[2*num]; // rs=operationAndStatistical(choose1, choose2, num,scope); // for(int i=0;i<num;i++) // { // System.out.println(rs[i]+"="+rs[i+num]); // } // } public static Scanner sc=new Scanner(System.in); //真分数和整数都需要用到 public static int maxyue(int y,int x)//最大公约数 { int r=y; while(r!=0) { r=x%y; x=y; y=r; } return x; } public static char youxian(String f,String s)//计算两个符号的优先级 { char a1[][]={ {'>','>','<','<','<','>','>'}, {'>','>','<','<','<','>','>'}, {'>','>','>','>','<','>','>'}, {'>','>','>','>','<','>','>'}, {'<','<','<','<','<','=',' '}, {'>','>','>','>',' ','>','>'}, {'<','<','<','<','<',' ','='} }; String a="+-*/()#"; int a11=a.indexOf(f); int a12=a.indexOf(s); return a1[a11][a12]; } static int [] chansheng(int num)//随机产生括号 { int []b=new int[num]; for(int i=0;i<b.length;i++) { b[i]=0; } Random rd=new Random(); for(int i=2;i<num;i++) { for(int j=0;j<num-i+1;j++) { int t=rd.nextInt(2); if(t==1) { if(b[j]>=0&&b[j+i-1]<=0) { int c=0; for(int k=j;k<j+i;k++) { c+=b[k]; } if(c==0) { b[j]++; b[j+i-1]--; } } } } } return b; } //运算 public static String jisuanbh(String a)//表达式的运算 { Stack <String>num=new Stack <String>(); Stack <String>fuhao=new Stack<String>(); a+="#"; fuhao.push("#"); char ch; int i=0; int s=0; int y=0; ch=a.charAt(i); while(!(ch+"").equals("#") || !fuhao.peek().equals("#")) { if(ch==' ')//如果遇到字符为空，说明遇到数字 { String rn="";//用来记录数据 while(true) { ch=a.charAt(++i); if(ch==' ') { break; } rn+=ch; } if((i+1)<a.length()){ ch=a.charAt(++i); } num.push(rn); } else//遇到的是字符 { char comp=youxian(fuhao.peek(),ch+"");//比较两个字符的优先级 if(comp=='='){//说明遇到右括号 fuhao.pop(); if((i+1)<a.length()){ ch=a.charAt(++i); } } else if(comp=='>')//优先级高，弹出两个数和一个运算符，进行运算 { String st1=num.pop(); String st2=num.pop(); String fuh1=fuhao.pop(); char fuh2=fuh1.charAt(0);//将String类型转为char类型 String []rs1=new String[2]; rs1=yunsuan2(st2, st1, fuh1); if(rs1[1].equals("error"))//如果运算中有问题，就结束运算 { return "error"; } else { num.push(rs1[0]+"");//将两数结果压入栈中 } } else//优先级比较低，把运算符压入栈中 { fuhao.push(ch+""); if((i+1)<a.length()) { ch=a.charAt(++i); } } } } String rs=num.pop(); int wz=rs.indexOf("/"); if(wz!=-1) { String fb=rs.substring(0, wz); String sb=rs.substring(wz+1,rs.length()); int fb1=Integer.parseInt(fb); int sb1=Integer.parseInt(sb); if(fb1>=sb1&&fb1%sb1==0) { rs=(fb1/sb1)+""; } else if(fb1<sb1&&fb1%sb1!=0) { int commondivisor=maxyue(fb1, sb1); fb1/=commondivisor; sb1/=commondivisor; rs=fb1+"/"+sb1; } else { int commondivisor=maxyue(fb1, sb1); fb1/=commondivisor; sb1/=commondivisor; rs=(fb1/sb1)+"'"+(fb1%sb1)+"/"+sb1; } } return rs; } public static String[] tys(String fn,String sn,char c)//两个整数的运算 { int a=Integer.parseInt(fn); int b=Integer.parseInt(sn); 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 a1[0]=a1[1]=""; int d=0;//d用来短暂存取两数运算结果 int z=0;//除法中判断a1[0]是否需要加上d if(c=='+') { d=a+b; } else if(c=='-') { if(a<b) { a1[1]="error"; return a1; } else { d=a-b; } } else if(c=='*') { d=a*b; } else { if(a%b==0&&a>=b) { d=a/b; } else { z=1; a1[0]=a+"/"+b; } } if(z==0) { a1[0] = d+""; } return a1; } public static String[] yunsuan2(String fn,String sn,String e)//两个数运算，分数，整数均可 { String rs[]=new String[2]; rs[0]=rs[1]=""; int location1=fn.indexOf("/"); int location2=sn.indexOf("/"); if(location1==-1&&location2==-1)//两个整数的运算 { rs=tys(fn, sn, e.charAt(0)); } else{ int a=0; int b=0; int c=0; int d=0; if(location1!=-1&&location2!=-1)//两个数都为真分数 { String r1=fn.substring(0,location1); String r2=fn.substring(location1+1,fn.length()); String r3=sn.substring(0,location2); String r4=sn.substring(location2+1,sn.length()); a=Integer.parseInt(r1); b=Integer.parseInt(r2); c=Integer.parseInt(r3); d=Integer.parseInt(r4); } else { if(location1==-1) { a=Integer.parseInt(fn); b=1; String r3=sn.substring(0,location2); String r4=sn.substring(location2+1,sn.length()); c=Integer.parseInt(r3); d=Integer.parseInt(r4); } else { c=Integer.parseInt(sn); d=1; String r1=fn.substring(0,location1); String r2=fn.substring(location1+1,fn.length()); a=Integer.parseInt(r1); b=Integer.parseInt(r2); } } int f=0,g=0,h=0,t=0; if(e.equals("+")) { if(b==d) { f=a+c; g=b; } else { g=b*d/maxyue(b,d); a=g/b*a; c=g/d*c; f=a+c; } } else if(e.equals("-")) { if(b==d) { f=a-c; if(f<=0) { rs[1]="error"; return rs; } g=b; } else { g=b*d/maxyue(b,d); a=g/b*a; c=g/d*c; f=a-c; if(f<0) { rs[1]="error"; return rs; } } } else if(e.equals("*")) { f=a*c; g=b*d; } else { f=a*d; g=b*c; } rs[0]=f+"/"+g; } return rs; } 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 { properFraction p =new properFraction(); integer i1= new integer(); String rs=""; int i=0; String saveexcep[]=new String[2*num]; while(i<num) { int n=(int) (Math.random()*3+2); if(ch1==1&&ch2==1) { rs=p.properFractionExithk(n,scope);//产生含有括号的真分数表达式 } else if(ch1==1&&ch2==2) { rs=p.properFractionExit(n,scope);//产生不含括号的真分数表达式 } else if(ch1==2&&ch2==1) { rs=i1.generateExpressionkh(n,scope);//产生含括号的整数表达式 } else { rs=i1.generationexception(n,scope);//产生不含括号的整数表达式 } String judgers=jisuanbh(rs);//记录答案 if(judgers.equals("error")) { System.out.print(""); } else { saveexcep[i]=rs; saveexcep[i+num]=judgers; i++; } } return saveexcep; } } 整数和真分数都需要用到的方法
package util; public class solve { 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 { boolean judgers[] = new boolean [a.length]; for(int i=0;i<a.length;i++) { judgers[i]=false; if(a[i].equals(b[i])) { judgers[i]=true; } } return judgers; } public int[] zongjie(boolean[] judeger) { int[] statisticaltrue = new int[2];//用来计算正确和错误的题数 statisticaltrue[0]=0; statisticaltrue[1]=0;//初始化 for(int i=0;i<judeger.length;i++) { if(judeger[i]==true) { statisticaltrue[0]+=1; } else { statisticaltrue[1]+=1; } } return statisticaltrue; } public String[] qiq (boolean []judgers) { String []rs =new String[2];//分别用来记录正确和错误的题号 rs[0]="正确的题目题号如下:"; rs[1]="错误的题目题号如下:"; for(int i=0;i<judgers.length;i++) { if(judgers[i]==true) { rs[0]+=(i+1)+" "; } else { rs[1]+=(i+1)+" "; } } return rs; } public String[]countexpression(String[]bds,String[]correctrs,String[]inputrs, boolean[]judgers) { String[]count1 = new String[judgers.length]; for(int i=0;i<judgers.length;i++) { if(judgers[i]==true) { count1[i]="第"+(i+1)+"道题:\t"+bds[i]+"="+correctrs[i]+"\t"+"回答正确"; } else { count1[i]="第"+(i+1)+"道题:\t"+bds[i]+"="+inputrs[i]+"\t"+"回答错误，"+"正确答案是"+correctrs[i]; } } return count1; } } 判断题目是否正确
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
