diff --git a/src/main/java/com/ybw/mathapp/entity/User.java b/src/main/java/com/ybw/mathapp/entity/User.java index 13cfb82..fa07684 100644 --- a/src/main/java/com/ybw/mathapp/entity/User.java +++ b/src/main/java/com/ybw/mathapp/entity/User.java @@ -1,44 +1,89 @@ package com.ybw.mathapp.entity; /** - * 用户实体类 + * 用户实体类，表示系统中的用户信息。 + * + *

该类包含用户的基本信息，如用户名、密码和学习级别。 + * 用户级别可以是小学、初中或高中。 + * + * @author 杨博文 + * @version 1.0 + * @since 2025 */ public class User { + + public String getName() { + return name; + } + + /** 用户名，不可修改。 */ + private final String name; + + /** 邮箱，不可修改。 */ private final String email; + + /** 用户密码，不可修改。 */ private final String password; + + /** 用户当前的学习级别，可以修改。 */ private String level; /** * 构造一个新的用户对象。 * - * @param email 邮箱，不能为空 + * @param email 邮箱，不能为空 用户名，不能为空 * @param password 用户密码，不能为空 */ - public User(String email, String password) { - this.email = email; + public User(String name, String email, String password) { + this.name = name; this.password = password; - this.level = "小学"; // 默认级别 - } - - public String getEmail() { - return email; + this.email = email; } + /** + * 获取用户密码。 + * + * @return 用户密码 + */ public String getPassword() { return password; } + /** + * 获取用户当前的学习级别。 + * + * @return 用户学习级别 + */ public String getLevel() { return level; } - public void setLevel(String level) { - this.level = level; + /** + * 获取用户邮箱。 + * + * @return 用户邮箱 + */ + public String getEmail() { + return email; + } + + /** + * 设置用户的学习级别。 + * + * @param newLevel 新的学习级别，支持"小学"、"初中"、"高中" + */ + public void setLevel(String newLevel) { + level = newLevel; } + /** + * 保存邮箱+密码。 + * + * @return 邮箱+密码 + */ @Override public String toString() { - return email + "," + password; + return name + "," + email + "," + password; } public static User fromString(String line) { @@ -46,12 +91,10 @@ public class User { return null; } - String[] parts = line.split(",", 2); - if (parts.length == 2) { - return new User(parts[0].trim(), parts[1].trim()); + String[] parts = line.split(",", 3); // 最多分割成3部分 + if (parts.length == 3) { + return new User(parts[0].trim(), parts[1].trim(), parts[2].trim()); } return null; } - - -} \ No newline at end of file +} diff --git a/src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java b/src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java index f245989..8c5c6ff 100644 --- a/src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java +++ b/src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java @@ -140,60 +140,60 @@ public class MultipleChoiceGenerator { return options; } + // ... (其他类成员和方法保持不变) + // --- 表达式分词逻辑 --- // 将 "3 + 开根号 ( 4 ) 平方 - sin 30" 分割成 ["3", "+", "开根号", "(", "4", ")", "平方", "-", "sin", "30"] private List tokenizeExpression(String expression) { List tokens = new ArrayList<>(); - StringBuilder currentToken = new StringBuilder(); - String[] advancedOps = {"平方", "开根号", "sin", "cos", "tan"}; + int i = 0; + while (i < expression.length()) { + String token = _findNextToken(expression, i); + if (token != null) { + tokens.add(token); + i += token.length(); + } else { + // 如果找不到匹配的 token，可能是单个字符或未知格式 + tokens.add(String.valueOf(expression.charAt(i))); + i++; + } + } + return tokens; + } - for (int i = 0; i < expression.length(); ) { - char c = expression.charAt(i); + /** + * 查找从指定位置开始的下一个 token。 + * @param expression 表达式字符串 + * @param startPos 起始查找位置 + * @return 找到的 token，如果未找到则返回 null + */ + private String _findNextToken(String expression, int startPos) { + String[] advancedOps = {"平方", "开根号", "sin", "cos", "tan"}; + char c = expression.charAt(startPos); - if (Character.isWhitespace(c)) { - if (currentToken.length() > 0) { - tokens.add(currentToken.toString()); - currentToken.setLength(0); - } - i++; - } else if (c == '(' || c == ')') { - if (currentToken.length() > 0) { - tokens.add(currentToken.toString()); - currentToken.setLength(0); - } - tokens.add(String.valueOf(c)); - i++; - } else if (Character.isDigit(c) || c == '.') { - currentToken.append(c); - i++; - } else { // 可能是运算符 - // Check for multi-character operators first - boolean foundOp = false; - for (String op : advancedOps) { - if (expression.startsWith(op, i)) { - if (currentToken.length() > 0) { - tokens.add(currentToken.toString()); - currentToken.setLength(0); - } - tokens.add(op); - i += op.length(); - foundOp = true; - break; - } - } - if (!foundOp) { // Not a known multi-char op, treat as single char (likely +, -, *, /) - if (currentToken.length() > 0) { - tokens.add(currentToken.toString()); - currentToken.setLength(0); - } - currentToken.append(c); - i++; - } + if (Character.isWhitespace(c)) { + return null; // 空格由调用者处理 + } + if (c == '(' || c == ')') { + return String.valueOf(c); + } + if (Character.isDigit(c) || c == '.') { + // 查找连续的数字或小数点 + int j = startPos; + while (j < expression.length() && (Character.isDigit(expression.charAt(j)) || expression.charAt(j) == '.')) { + j++; } + return expression.substring(startPos, j); } - if (currentToken.length() > 0) { - tokens.add(currentToken.toString()); + + // 检查多字符运算符 + for (String op : advancedOps) { + if (expression.startsWith(op, startPos)) { + return op; + } } - return tokens; + + // 如果不是多字符运算符，则认为是单字符运算符 (+, -, *, / 等) + return String.valueOf(c); } } \ No newline at end of file diff --git a/src/main/java/com/ybw/mathapp/system/LogSystem.java b/src/main/java/com/ybw/mathapp/system/LogSystem.java deleted file mode 100644 index a610d31..0000000 --- a/src/main/java/com/ybw/mathapp/system/LogSystem.java +++ /dev/null @@ -1,39 +0,0 @@ -package com.ybw.mathapp.system; - -import com.ybw.mathapp.entity.User; -import java.util.HashMap; -import java.util.Scanner; - -public class LogSystem { - private final HashMap userHashMap = new HashMap<>(); - - public void userHashMapInit() { - // 小学 - userHashMap.put("1798231811@qq.com", new User("1798231811@qq.com", "1234567")); - } - - public User login() { - System.out.println("请输入用户名和密码，两者之间用空格隔开,用户名为邮箱账号"); - while(true) { - Scanner scanner = new Scanner(System.in); - String[] info = scanner.nextLine().split(" "); - if(info.length != 2) { - System.out.println("请输入正确格式"); - } else { - String name = info[0]; - String password = info[1]; - User user = userHashMap.get(name); - if (user == null) { - System.out.println("邮箱未注册"); - } - else if (!user.getPassword().equals(password)) { - System.out.println("请输入正确的用户名、密码"); - } - else { - System.out.println("当前选择为" + user.getLevel() + "出题"); - return user; - } - } - } - } -} diff --git a/src/main/java/com/ybw/mathapp/util/ChangePassword.java b/src/main/java/com/ybw/mathapp/util/ChangePassword.java new file mode 100644 index 0000000..72af3df --- /dev/null +++ b/src/main/java/com/ybw/mathapp/util/ChangePassword.java @@ -0,0 +1,91 @@ +package com.ybw.mathapp.util; + +import static com.ybw.mathapp.util.LoginFileUtils.USER_FILE; + +import java.io.BufferedReader; +import java.io.BufferedWriter; +import java.io.File; +import java.io.FileReader; +import java.io.FileWriter; +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; + +public class ChangePassword { + static final List lines = new ArrayList<>(); + static String userLine = null; + static int userLineNumber = -1; + + // 前端接口-修改密码 + public static boolean changePassword(String name, String newPassword) { + File file = new File(USER_FILE); + if (!file.exists()) { + System.out.println("用户文件不存在: " + USER_FILE); + return false; + } + + // 1. 读取文件，查找用户 + if(!findUserLine(name, file)) { + return false; + } + + if (userLine == null || userLineNumber == -1) { + // 用户未找到 + System.out.println("用户 '" + name + "' 不存在，修改失败。"); + return false; + } + + // 2. 更新找到的用户行中的密码 + String[] parts = userLine.split(","); + if (parts.length != 3) { + return false; + } + parts[2] = newPassword; // 假设密码是第三个字段 + String updatedLine = String.join(",", parts); + + lines.set(userLineNumber, updatedLine); // 替换列表中的旧行 + + // 3. 将更新后的内容写回文件 + if(!writeBack(lines, file)) { + return false; + } + + return true; + } + + public static boolean writeBack(List lines, File file) { + try (BufferedWriter writer = new BufferedWriter(new FileWriter(file))) { + for (String l : lines) { + writer.write(l); + writer.newLine(); + } + } catch (IOException e) { + System.err.println("写入文件时出错: " + e.getMessage()); + return false; // 如果写回失败，认为修改未成功 + } + return true; + } + + public static boolean findUserLine(String name, File file) { + try (BufferedReader reader = new BufferedReader(new FileReader(file))) { + String line; + int currentLineNum = 0; + while ((line = reader.readLine()) != null) { + lines.add(line); + String[] parts = line.split(","); + // 假设格式为: username,email,password + if (parts.length >= 3 && parts[0].equals(name)) { + userLine = line; // 找到用户行 + userLineNumber = currentLineNum; + break; // 找到后可以退出循环 + } + currentLineNum++; + } + } catch (IOException e) { + System.err.println("读取文件时出错: " + e.getMessage()); + return false; + } + return true; + } + +} diff --git a/src/main/java/com/ybw/mathapp/util/Login.java b/src/main/java/com/ybw/mathapp/util/Login.java index 821d19c..83f18c0 100644 --- a/src/main/java/com/ybw/mathapp/util/Login.java +++ b/src/main/java/com/ybw/mathapp/util/Login.java @@ -1,13 +1,11 @@ package com.ybw.mathapp.util; -import java.util.regex.Pattern; - public class Login { // 前端接口-登录成功or失败 - public static boolean login(String email, String password) { - if (LoginFileUtils.validateUser(email, password)) { - System.out.println("登录成功！欢迎回来，" + email); + public static boolean login(String name, String password) { + if (LoginFileUtils.validateUser(name, password)) { + System.out.println("登录成功！欢迎回来，" + name); return true; } else { System.out.println("邮箱或密码错误！"); diff --git a/src/main/java/com/ybw/mathapp/util/LoginFileUtils.java b/src/main/java/com/ybw/mathapp/util/LoginFileUtils.java index f99a56f..ce1b62b 100644 --- a/src/main/java/com/ybw/mathapp/util/LoginFileUtils.java +++ b/src/main/java/com/ybw/mathapp/util/LoginFileUtils.java @@ -6,10 +6,9 @@ import java.util.ArrayList; import java.util.List; public class LoginFileUtils { - private static final String USER_FILE = "users.txt"; + static final String USER_FILE = "users.txt"; // 读取所有用户 - // FileUtils.java 中的 readUsers 方法（简化版） public static List readUsers() { List users = new ArrayList<>(); File file = new File(USER_FILE); @@ -49,7 +48,7 @@ public class LoginFileUtils { } } - // 检查邮箱是否已注册 + // 前端接口-检查邮箱是否已注册 public static boolean isEmailRegistered(String email) { List users = readUsers(); for (User user : users) { @@ -60,12 +59,24 @@ public class LoginFileUtils { return false; } - // 验证用户登录 - public static boolean validateUser(String email, String password) { + // 前端接口-检查用户名是否已注册 + public static boolean isNameRegistered(String name) { List users = readUsers(); for (User user : users) { - if (user.getEmail().equalsIgnoreCase(email) && - user.getPassword().equals(password)) { + if (user.getName().equalsIgnoreCase(name)) { + return true; + } + } + return false; + } + + // 前端接口-验证用户登录 + public static boolean validateUser(String emailOrName, String password) { + List users = readUsers(); + for (User user : users) { + if ((user.getEmail().equalsIgnoreCase(emailOrName) + || user.getName().equalsIgnoreCase(emailOrName) ) + && user.getPassword().equals(password)) { return true; } } diff --git a/src/main/java/com/ybw/mathapp/util/Register.java b/src/main/java/com/ybw/mathapp/util/Register.java index 4ad06cd..a79fb51 100644 --- a/src/main/java/com/ybw/mathapp/util/Register.java +++ b/src/main/java/com/ybw/mathapp/util/Register.java @@ -6,8 +6,8 @@ import java.util.regex.Pattern; public class Register { // 前端接口-完成注册 - public static boolean register(String email, String password1) { - User user = new User(email, password1); + public static boolean register(String name, String email, String password1) { + User user = new User(name, email, password1); LoginFileUtils.saveUser(user); System.out.println("注册成功！您可以使用邮箱和密码登录了。"); return true;