xiu2

server/.idea/workspace.xml

@@ -78,6 +78,10 @@
       <recent name="E:\项目实战整理\1. JAVA实战项目\2022-01-17 学校社团管理系统\项目代码\server\src\main\resources" />
       <recent name="E:\项目实战整理\1. JAVA实战项目\2022-01-17 学校社团管理系统\项目代码\src\main\java" />
     </key>
+    <key name="MoveFile.RECENT_KEYS">
+      <recent name="D:\BaiduNetdiskDownload\springboot和vue社团管理\server\src\main\java\self\cases\teams" />
+      <recent name="D:\BaiduNetdiskDownload\springboot和vue社团管理\server\src\main" />
+    </key>
   </component>
   <component name="RunManager">
     <configuration name="Application" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot" temporary="true" nameIsGenerated="true">
@@ -140,6 +144,7 @@
       <workItem from="1744097186572" duration="686000" />
       <workItem from="1744187732630" duration="3771000" />
       <workItem from="1744197535410" duration="1873000" />
+      <workItem from="1744199899989" duration="1551000" />
     </task>
     <servers />
   </component>

server/src/main/java/self/cases/teams/Student.java

@@ -0,0 +1,351 @@
+package self.cases.teams;
+
+import java.io.*;
+import java.text.SimpleDateFormat;
+import java.util.*;
+import java.util.stream.Collectors;
+
+// 学生类
+class Student implements Serializable {
+    private String id;
+    private String name;
+    private int age;
+    private String className;
+    private Date enrollDate;
+    private Map<String, Double> scores;
+
+    public Student(String id, String name, int age, String className) {
+        this.id = id;
+        this.name = name;
+        this.age = age;
+        this.className = className;
+        this.enrollDate = new Date();
+        this.scores = new HashMap<>();
+    }
+
+    // Getter和Setter方法
+    public String getId() { return id; }
+    public String getName() { return name; }
+    public int getAge() { return age; }
+    public String getClassName() { return className; }
+    public Date getEnrollDate() { return enrollDate; }
+    public Map<String, Double> getScores() { return scores; }
+
+    public void updateScore(String course, double score) {
+        scores.put(course, score);
+    }
+
+    public double calculateAverage() {
+        return scores.values().stream()
+                .mapToDouble(Double::doubleValue)
+                .average()
+                .orElse(0.0);
+    }
+
+    @Override
+    public String toString() {
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+        return String.format("学号: %s\n姓名: %s\n年龄: %d\n班级: %s\n入学日期: %s",
+                id, name, age, className, sdf.format(enrollDate));
+    }
+}
+
+// 课程管理类
+class CourseManager {
+    private static final List<String> AVAILABLE_COURSES = Arrays.asList(
+            "数学", "语文", "英语", "物理", "化学"
+    );
+
+    public static boolean isValidCourse(String course) {
+        return AVAILABLE_COURSES.contains(course);
+    }
+
+    public static void showAvailableCourses() {
+        System.out.println("可选课程列表:");
+        AVAILABLE_COURSES.forEach(c -> System.out.print(c + " "));
+        System.out.println();
+    }
+}
+
+// 文件工具类
+class FileUtil {
+    private static final String DATA_FILE = "students.dat";
+
+    public static void saveData(List<Student> students) {
+        try (ObjectOutputStream oos = new ObjectOutputStream(
+                new FileOutputStream(DATA_FILE))) {
+            oos.writeObject(students);
+        } catch (IOException e) {
+            System.err.println("数据保存失败: " + e.getMessage());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public static List<Student> loadData() {
+        File file = new File(DATA_FILE);
+        if (!file.exists()) return new ArrayList<>();
+
+        try (ObjectInputStream ois = new ObjectInputStream(
+                new FileInputStream(DATA_FILE))) {
+            return (List<Student>) ois.readObject();
+        } catch (IOException | ClassNotFoundException e) {
+            System.err.println("数据加载失败: " + e.getMessage());
+            return new ArrayList<>();
+        }
+    }
+}
+
+// 输入工具类
+class InputUtil {
+    private static final Scanner scanner = new Scanner(System.in);
+
+    public static int getIntInput(String prompt) {
+        while (true) {
+            System.out.print(prompt);
+            try {
+                return Integer.parseInt(scanner.nextLine());
+            } catch (NumberFormatException e) {
+                System.out.println("输入无效，请输入整数！");
+            }
+        }
+    }
+
+    public static String getStringInput(String prompt) {
+        System.out.print(prompt);
+        return scanner.nextLine().trim();
+    }
+
+    public static double getDoubleInput(String prompt) {
+        while (true) {
+            System.out.print(prompt);
+            try {
+                return Double.parseDouble(scanner.nextLine());
+            } catch (NumberFormatException e) {
+                System.out.println("输入无效，请输入数字！");
+            }
+        }
+    }
+}
+
+// 主系统类
+class StudentManagementSystem {
+    private List<Student> students;
+    private boolean isRunning = true;
+
+    public StudentManagementSystem() {
+        students = FileUtil.loadData();
+    }
+
+    public void start() {
+        while (isRunning) {
+            showMainMenu();
+            int choice = InputUtil.getIntInput("请选择操作：");
+            handleMainMenu(choice);
+        }
+    }
+
+    private void showMainMenu() {
+        System.out.println("\n==== 学生信息管理系统 ====");
+        System.out.println("1. 添加学生");
+        System.out.println("2. 查询学生");
+        System.out.println("3. 录入成绩");
+        System.out.println("4. 显示统计");
+        System.out.println("5. 删除学生");
+        System.out.println("6. 保存数据");
+        System.out.println("7. 退出系统");
+    }
+
+    private void handleMainMenu(int choice) {
+        switch (choice) {
+//            case 1 -> addStudent();
+//            case 2 -> searchStudent();
+//            case 3 -> inputScore();
+//            case 4 -> showStatistics();
+//            case 5 -> deleteStudent();
+//            case 6 -> saveData();
+//            case 7 -> exitSystem();
+//            default -> System.out.println("无效选项！");
+        }
+    }
+
+    private void addStudent() {
+        String id = InputUtil.getStringInput("请输入学号：");
+        if (isStudentExist(id)) {
+            System.out.println("该学号已存在！");
+            return;
+        }
+
+        String name = InputUtil.getStringInput("请输入姓名：");
+        int age = InputUtil.getIntInput("请输入年龄：");
+        String className = InputUtil.getStringInput("请输入班级：");
+
+        Student student = new Student(id, name, age, className);
+        students.add(student);
+        System.out.println("学生添加成功！");
+    }
+
+    private void searchStudent() {
+        System.out.println("\n==== 查询选项 ====");
+        System.out.println("1. 按学号查询");
+        System.out.println("2. 按姓名查询");
+        System.out.println("3. 显示全部");
+        int choice = InputUtil.getIntInput("请选择查询方式：");
+
+        switch (choice) {
+//            case 1 -> searchById();
+//            case 2 -> searchByName();
+//            case 3 -> showAllStudents();
+//            default -> System.out.println("无效选项！");
+        }
+    }
+
+    private void searchById() {
+        String id = InputUtil.getStringInput("请输入学号：");
+        students.stream()
+                .filter(s -> s.getId().equals(id))
+                .findFirst();
+
+    }
+
+    private void searchByName() {
+        String name = InputUtil.getStringInput("请输入姓名：");
+        List<Student> result = null;
+        try {
+            students.stream()
+                    .filter(s -> s.getName().equalsIgnoreCase(name))
+                    .wait();
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+
+        if (result.isEmpty()) {
+            System.out.println("找不到该学生");
+        } else {
+            result.forEach(System.out::println);
+        }
+    }
+
+    private void showAllStudents() {
+        if (students.isEmpty()) {
+            System.out.println("当前没有学生记录");
+            return;
+        }
+        students.forEach(s -> {
+            System.out.println(s);
+            System.out.println("--------------------");
+        });
+    }
+
+    private void inputScore() {
+        String id = InputUtil.getStringInput("请输入学号：");
+        Student student = findStudentById(id);
+        if (student == null) {
+            System.out.println("学生不存在！");
+            return;
+        }
+
+        CourseManager.showAvailableCourses();
+        String course = InputUtil.getStringInput("请输入课程名称：");
+        if (!CourseManager.isValidCourse(course)) {
+            System.out.println("无效课程！");
+            return;
+        }
+
+        double score = InputUtil.getDoubleInput("请输入成绩：");
+        student.updateScore(course, score);
+        System.out.println("成绩录入成功！");
+    }
+
+    private void showStatistics() {
+        System.out.println("\n==== 统计信息 ====");
+        System.out.println("1. 班级人数统计");
+        System.out.println("2. 课程平均分");
+        System.out.println("3. 学生个人成绩");
+        int choice = InputUtil.getIntInput("请选择统计类型：");
+
+        switch (choice) {
+//            case 1 -> showClassStatistics();
+//            case 2 -> showCourseStatistics();
+//            case 3 -> showStudentScores();
+//            default -> System.out.println("无效选项！");
+        }
+    }
+
+    private void showClassStatistics() {
+        Map<String, Long> classCount = students.stream()
+                .collect(Collectors.groupingBy(
+                        Student::getClassName,
+                        Collectors.counting()));
+
+        classCount.forEach((className, count) ->
+                System.out.printf("班级 %s: %d 人\n", className, count));
+    }
+
+    private void showCourseStatistics() {
+        Map<String, Double> courseAverages = new HashMap<>();
+        students.forEach(student ->
+                student.getScores().forEach((course, score) ->
+                        courseAverages.merge(course, score, Double::sum)));
+
+        courseAverages.forEach((course, total) -> {
+            long count = students.stream()
+                    .filter(s -> s.getScores().containsKey(course))
+                    .count();
+            double average = count > 0 ? total / count : 0;
+            System.out.printf("%s 平均分: %.2f\n", course, average);
+        });
+    }
+
+    private void showStudentScores() {
+        String id = InputUtil.getStringInput("请输入学号：");
+        Student student = findStudentById(id);
+        if (student == null) {
+            System.out.println("学生不存在！");
+            return;
+        }
+
+        System.out.println(student);
+        if (student.getScores().isEmpty()) {
+            System.out.println("暂无成绩记录");
+            return;
+        }
+
+        student.getScores().forEach((course, score) ->
+                System.out.printf("%s: %.2f\n", course, score));
+        System.out.printf("平均分: %.2f\n", student.calculateAverage());
+    }
+
+    private void deleteStudent() {
+        String id = InputUtil.getStringInput("请输入要删除的学号：");
+        boolean removed = students.removeIf(s -> s.getId().equals(id));
+        System.out.println(removed ? "删除成功！" : "学生不存在！");
+    }
+
+    private void saveData() {
+        FileUtil.saveData(students);
+        System.out.println("数据已保存！");
+    }
+
+    private void exitSystem() {
+        isRunning = false;
+        System.out.println("正在退出系统...");
+        saveData();
+        System.out.println("谢谢使用！");
+    }
+
+    private boolean isStudentExist(String id) {
+        return students.stream()
+                .anyMatch(s -> s.getId().equals(id));
+    }
+
+    private Student findStudentById(String id) {
+        return students.stream()
+                .filter(s -> s.getId().equals(id))
+                .findFirst()
+                .orElse(null);
+    }
+
+    public static void main(String[] args) {
+        new StudentManagementSystem().start();
+    }
+}