结对编程——中小学数学卷子自动生成程序队友项目互评
结构：
队友代码分了三个包，六个.java文件
1.User.java：定义了User类，存储User的属性和一些简单的调用方法。
点击查看代码
package com.users;
public class User {
private String name;
private String password;
private int grade;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getGrade() {
return grade;
}
public void setGrade(int grade) {
this.grade = grade;
}
}
点击查看代码
package com.users;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class UserInit {
public static String dir = "D:\\Auni\\大三上\\软件工程导论\\个人项目\\202026010516-陈雪萍-第一周大项目\\";
public static List<User> Init() {
List<User> users = new ArrayList<>();
File infile = new File(dir + "user.txt");
try {
BufferedReader bu = new BufferedReader(new FileReader(infile));//读入文件
String temp;
while ((temp = bu.readLine()) != null) {
String[] stringSplit = temp.split("\\s+");
User us = new User();
us.setName(stringSplit[0]);
us.setPassword(stringSplit[1]);
if (stringSplit[2].equals("小学")) {
us.setGrade(1);
}
if (stringSplit[2].equals("初中")) {
us.setGrade(2);
}
if (stringSplit[2].equals("高中")) {
us.setGrade(3);
}
users.add(us);
}
bu.close();
} catch (Exception e) {
e.printStackTrace();
return null;
}
return users;//返回全部用户
}
public static User login(List<User> users) {
System.out.println("请输入用户名和密码：");
Scanner sc = new Scanner(System.in);
boolean flag = false;
User us = new User();
while (!flag) {
String[] s = sc.nextLine().split("\\s+");
if (s.length < 2) {
System.out.println("请输入正确的用户名、密码:");
continue;
}
String name = s[0];
String password = s[1];
for (User user : users) {
if (user.getName().equals(name) && user.getPassword().equals(password)) {
flag = true;
int grade = user.getGrade();
us.setGrade(user.getGrade());
us.setName(user.getName());
us.setPassword(user.getPassword());
System.out.print("当前选择为");
if (grade == 1) {
System.out.print("小学");
}
if (grade == 2) {
System.out.print("初中");
}
if (grade == 3) {
System.out.print("高中");
}
System.out.println("出题");
break;
}
}
if (!flag) {
System.out.println("请输入正确的用户名、密码:");
}
}
return us;
}
}
点击查看代码
package com.math;
import java.io.*;
import java.util.HashSet;
import java.util.Random;
public class GetVal {
public static String dir = "D:\\Auni\\大三上\\软件工程导论\\个人项目\\202026010516-陈雪萍-第一周大项目\\";
public String getval(int state) {
String[] operands = new String[]{"+", "-", "*", "/", "^2", "√", "sin", "cos", "tan"};
Random dome = new Random();
StringBuilder val = new StringBuilder(new String());
if (state == 1) {
while (true) {
val = new StringBuilder();
int length = 0;
int numberOfNodes = dome.nextInt(3);
int left = 0;
int temp = 0;
while (true) {
if (dome.nextInt(2) == 0 && numberOfNodes > 0) {
val.append("(");
numberOfNodes--;
left++;
temp = 0;
}
int num = dome.nextInt(100) + 1;
val.append(num);
temp++;
if (dome.nextInt(2) == 0 && left > 0 && temp >= 2) {
val.append(")");
left--;
}
if (length >= 2 && numberOfNodes <= 0 && left <= 0) {
break;
}
val.append(operands[dome.nextInt(4)]);
length++;
}
if (length < 5 && temp < 3) {
break;
}
}
}
if (state == 2) {
while (true) {
val = new StringBuilder();
int length = 0;
int oprand = dome.nextInt(2) + 1;
int numberOfNodes = dome.nextInt(2);
int left = 0;
int temp = 0;
while (true) {
if (dome.nextInt(2) == 0 && numberOfNodes > 0) {
val.append("(");
numberOfNodes--;
left++;
temp = 0;
}
temp++;
int num = dome.nextInt(100) + 1;
if (dome.nextInt(2) == 0) {
if (dome.nextInt(2) == 0) {
val.append(num).append(operands[4]);
} else {
val.append(operands[5]).append(num);
}
oprand--;
} else {
val.append(num);
}
if (dome.nextInt(2) == 0 && left > 0 && temp >= 2) {
val.append(")");
left--;
}
if (length >= 2 && oprand <= 0 && numberOfNodes <= 0 && left <= 0) {
break;
}
val.append(operands[dome.nextInt(4)]);
length++;
}
if (length < 5 && temp < 5) {
break;
}
}
}
if (state == 3) {
while (true) {
val = new StringBuilder();
int length = 0;
int minCount = 1;
int trigFunc = dome.nextInt(3) + 1;
int numberOfNodes = dome.nextInt(3);
int left = 0;
int temp = 0;
while (true) {
if (dome.nextInt(2) == 0 && numberOfNodes > 0) {
val.append("(");
numberOfNodes--;
left++;
temp = 0;
}
temp++;
int num = dome.nextInt(100) + 1;
if (dome.nextInt(3) == 0) {
if (dome.nextInt(2) == 0) {
val.append(num).append(operands[4]);
} else {
val.append(operands[5]).append(num);
}
minCount--;
} else {
if (dome.nextInt(2) == 0) {
int need = dome.nextInt(3) + 6;
val.append(operands[need]).append(num);
trigFunc--;
} else {
val.append(num);
}
}
if (dome.nextInt(2) == 0 && left > 0 && temp >= 2) {
val.append(")");
left--;
}
if (length >= 2 && minCount <= 0 && trigFunc <= 0 && numberOfNodes <= 0 && left <= 0) {
break;
}
val.append(operands[dome.nextInt(4)]);
length++;
}
if (length < 5 && temp < 5) {
break;
}
}
}
val.append("=");
return val.toString();
}
public HashSet<String> getAll(String name) {
String dpath = dir + name;
File file = new File(dpath);
if (!file.exists()) {
file.mkdir();
}
File[] files = file.listFiles();
HashSet<String> pastVal = new HashSet<>();
assert files != null;
for (File fs : files) {
if (!fs.isDirectory()) {
try {
BufferedReader br = new BufferedReader(new FileReader(fs));
String line;
while ((line = br.readLine()) != null) {
pastVal.add(line);
}
br.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
return pastVal;
}
}
点击查看代码
package com.math;
import java.io.FileWriter;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashSet;
public class OutFile {
public static String dir = "D:\\Auni\\大三上\\软件工程导论\\个人项目\\202026010516-陈雪萍-第一周大项目\\";
public static void out(String name, int state, int num) {
GetVal p1=new GetVal();
HashSet<String> past = p1.getAll(name);
String dirPath = dir + name;
final SimpleDateFormat SDF = new SimpleDateFormat();
SDF.applyPattern("yyyy-MM-dd-HH-mm-ss");
String path = dirPath + "\\" + SDF.format(new Date()) + ".txt";
try {
FileWriter add = new FileWriter(path, true);
for (int i = 0; i < num; i++) {
String newVal = p1.getval(state);
if (!past.contains(newVal)) {
newVal = (i + 1) + "." + newVal;
add.write(newVal+ "\n" + "\n");
}
}
System.out.println("卷子生成完毕");
add.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
点击查看代码
package com.system;
import com.math.OutFile;
import com.users.User;
import com.users.UserInit;
import java.util.List;
import java.util.Scanner;
public class Judge {
public static final String primary = "小学";
public static final String junior = "初中";
public static final String senior = "高中";
static int input(int state) {
System.out.print("准备生成");//对应的年级输出相应的提示语
if (state == 1) {
System.out.print(primary);
}
if (state == 2) {
System.out.print(junior);
}
if (state == 3) {
System.out.print(senior);
}
System.out.println("数学题目，请输入生成题目数量（输入-1将退出当前用户，重新登录）：");
int temp = 0;
Scanner in = new Scanner(System.in);
String input = in.nextLine();
while (true) {
if (input.contains("切换为")) {
while (true) {
if (input.equals("切换为小学")) {
temp = 1;
break;
}
if (input.equals("切换为初中")) {
temp = 2;
break;
}
if (input.equals("切换为高中")) {
temp = 3;
break;
}
System.out.println("请输入小学、初中和高中三个选项中的一个");//不满足条件继续重新输入
input = in.nextLine();
}
}
if (input.equals("-1")) {
temp = -1;
}
if (input.matches("\\d+")) {
int num = Integer.parseInt(input);
if (num >= 10 && num < 30) {
temp = num;
} else {
System.out.println("输入范围错误，请重新输入");
input = in.nextLine();
continue;
}
}
if(temp == 0) {
System.out.println("输入错误，请重新输入");
input = in.nextLine();
continue;
}
break;
}
return temp;
}
public void change() {
List<User> users = UserInit.Init();
User us = UserInit.login(users);
int newState = us.getGrade();
while (true) {
int in = input(newState);
switch (in) {
case -1:
us = UserInit.login(users);
newState = us.getGrade();
break;
case 1:
newState = 1;
break;
case 2:
newState = 2;
break;
case 3:
newState = 3;
break;
default:
OutFile.out(us.getName(), newState, in);
}
}
}
}
点击查看代码
package com.system;
public class Main {
public static void main(String[] args) {
Judge j2 = new Judge();
j2.change();
}
}
优点：
- 结构清晰，模块化
基于面向对象的思想，用户类、出题类、系统类，Java类分的很清楚，将用户登录、切换、生成试卷、输出试题卷等操作抽象成类，完成封装，封装性能良好。 - 异常处理机制
在使用文件流IO时使用try catch捕捉异常。IO输入容易产生错误，因为可能会有文件路径出错，文件找不到等运行时错误，在编译阶段找不出这些问题。代码中多次用到异常处理机制，比如说OutFile中，由于要输出文件到指定的路径，而我拿了队友代码后修改成自己的路径时出错了，系统给了我出错的提示但并没有终止程序。队友的异常处理使得代码更加健壮。
- Main函数
队友最后调用Main主函数即可跑动程序，一切都被封装起来。 - 扩展性强
队友的代码，User信息存储在user.txt文件中，通过读取这个文件的内容从而构建user的List，如果有新的用户加入，就可以修改user.txt的内容即可，而不用修改代码。我觉得队友的做法和连接数据库有点相似，大大扩展了代码的使用领域。
点击查看代码
public static List<User> Init() {
List<User> users = new ArrayList<>();
File infile = new File(dir + "user.txt");
try {
BufferedReader bu = new BufferedReader(new FileReader(infile));//读入文件
String temp;
while ((temp = bu.readLine()) != null) {
String[] stringSplit = temp.split("\\s+");
User us = new User();
us.setName(stringSplit[0]);
us.setPassword(stringSplit[1]);
if (stringSplit[2].equals("小学")) {
us.setGrade(1);
}
if (stringSplit[2].equals("初中")) {
us.setGrade(2);
}
if (stringSplit[2].equals("高中")) {
us.setGrade(3);
}
users.add(us);
}
bu.close();
} catch (Exception e) {
e.printStackTrace();
return null;
}
return users;//返回全部用户
}
缺点：
- 部分代码不规范
静态常量没有大写，比如
public static final String primary = "小学";
部分命名没有遵守驼峰规则，比如
public String getval(int state)
此处getval应该写成getVal - 没有查重
题目要求一个老师不能出重复的题目，队友代码没有写出查重的功能。
建议队友加上题目查重的功能。 - 注释较少，部分代码理解有困难
队友代码大部分是非常简洁的，就是数学题目生成逻辑那块儿不怎么看得懂，有一些变量可以写上注释，可以便于读者理解。 - 通配符
代码中有通配符，不符合Google代码规范
import java.io.*;
