Java语言，做出班级成绩综合评测系统，要能用io流存储和读取数据，代码实现

好的，下面是Java代码实现班级成绩综合评测系统，可以用io流存储和读取数据的功能：

import java.io.*;
import java.util.*;

class Student implements Serializable {
    private String name;
    private String id;
    private Map<String, Double> scores;

    public Student(String name, String id) {
        this.name = name;
        this.id = id;
        scores = new HashMap<>();
    }

    public void addScore(String subject, double score) {
        scores.put(subject, score);
    }

    public void removeScore(String subject) {
        scores.remove(subject);
    }

    public String getName() {
        return name;
    }

    public String getId() {
        return id;
    }

    public double getScore(String subject) {
        return scores.get(subject);
    }

    public double getAverage() {
        double sum = 0.0;
        for (double score : scores.values()) {
            sum += score;
        }
        return sum / scores.size();
    }

    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("Name: " + name + "\n");
        sb.append("ID: " + id + "\n");
        sb.append("Scores:\n");
        for (String subject : scores.keySet()) {
            sb.append(subject + ": " + scores.get(subject) + "\n");
        }
        sb.append("Average: " + getAverage() + "\n");
        return sb.toString();
    }
}

class ClassScore implements Serializable {
    private List<Student> students;

    public ClassScore() {
        students = new ArrayList<>();
    }

    public void addStudent(Student student) {
        students.add(student);
    }

    public void removeStudent(Student student) {
        students.remove(student);
    }

    public Student getStudent(String id) {
        for (Student student : students) {
            if (student.getId().equals(id)) {
                return student;
            }
        }
        return null;
    }

    public List<Student> getAllStudents() {
        return students;
    }

    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("Class Score:\n");
        for (Student student : students) {
            sb.append(student.toString() + "\n");
        }
        return sb.toString();
    }
}

public class ClassScoreSystem {
    private ClassScore classScore;

    public ClassScoreSystem() {
        classScore = new ClassScore();
    }

    public void addStudent(Student student) {
        classScore.addStudent(student);
    }

    public void removeStudent(Student student) {
        classScore.removeStudent(student);
    }

    public Student getStudent(String id) {
        return classScore.getStudent(id);
    }

    public List<Student> getAllStudents() {
        return classScore.getAllStudents();
    }

    public void saveToFile(String filename) throws IOException {
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(filename));
        out.writeObject(classScore);
        out.close();
    }

    public void loadFromFile(String filename) throws IOException, ClassNotFoundException {
        ObjectInputStream in = new ObjectInputStream(new FileInputStream(filename));
        classScore = (ClassScore) in.readObject();
        in.close();
    }

    public static void main(String[] args) {
        ClassScoreSystem system = new ClassScoreSystem();

        // Add some students and their scores
        Student s1 = new Student("Tom", "001");
        s1.addScore("Math", 80.0);
        s1.addScore("English", 85.0);
        s1.addScore("Chinese", 90.0);
        system.addStudent(s1);

        Student s2 = new Student("Jerry", "002");
        s2.addScore("Math", 85.0);
        s2.addScore("English", 90.0);
        s2.addScore("Chinese", 95.0);
        system.addStudent(s2);

        // Save the data to file
        try {
            system.saveToFile("classscore.dat");
        } catch (IOException e) {
            e.printStackTrace();
        }

        // Clear the data and load from file
        system = new ClassScoreSystem();
        try {
            system.loadFromFile("classscore.dat");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

        // Print the data
        System.out.println(system.toString());
    }
}

以上代码实现了班级成绩综合评测系统，其中使用了ObjectOutputStream和ObjectInputStream实现了数据的存储和读取。您可以根据实际需求进行修改和完善。