用Java 对象流写一个学生集合序列化

好的，下面是实现代码：

首先，我们需要定义一个 `Student` 类，该类需要实现 `Serializable` 接口，以便能够被序列化和反序列化。

import java.io.Serializable;

public class Student implements Serializable {
    private static final long serialVersionUID = 1L;
    private int id;
    private String name;
    private int age;

    public Student(int id, String name, int age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public int getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

接下来，我们需要创建一个包含多个 `Student` 对象的集合，这里我们使用 `ArrayList`。

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;

public class SerializeStudent {
    public static void main(String[] args) {
        ArrayList<Student> students = new ArrayList<Student>();
        students.add(new Student(1, "Tom", 18));
        students.add(new Student(2, "Jerry", 19));
        students.add(new Student(3, "Mike", 20));
        students.add(new Student(4, "John", 21));
        students.add(new Student(5, "Lucy", 22));
    }
}

最后，我们使用 `ObjectOutputStream` 将集合对象序列化到文件中。

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;

public class SerializeStudent {
    public static void main(String[] args) {
        ArrayList<Student> students = new ArrayList<Student>();
        students.add(new Student(1, "Tom", 18));
        students.add(new Student(2, "Jerry", 19));
        students.add(new Student(3, "Mike", 20));
        students.add(new Student(4, "John", 21));
        students.add(new Student(5, "Lucy", 22));

        try {
            FileOutputStream fileOut = new FileOutputStream("students.ser");
            ObjectOutputStream out = new ObjectOutputStream(fileOut);
            out.writeObject(students);
            out.close();
            fileOut.close();
            System.out.println("Serialized data is saved in students.ser");
        } catch (Exception e) {
            System.out.println("Error: " + e.getMessage());
        }
    }
}

以上代码中，我们将 `ArrayList` 对象 `students` 序列化到文件 `students.ser` 中。如果一切顺利，程序会输出 "Serialized data is saved in students.ser"。