了解序列化流，实现效果：将若干个Student对象添加到List集合中，然后将List存储到txt文件中，再从txt文件读取内容，并且打印List

了解序列化流，可以通过使用Java的ObjectOutputStream和ObjectInputStream类来实现将对象序列化到文件和从文件中反序列化对象的操作。下面是实现将Student对象添加到List集合中，然后将List存储到txt文件中，再从txt文件读取内容并打印List的示例代码：

import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class SerializationExample {
    public static void main(String[] args) {
        List<Student> studentList = new ArrayList<>();

        // 添加Student对象到List集合中
        studentList.add(new Student("Alice", 20));
        studentList.add(new Student("Bob", 21));
        studentList.add(new Student("Charlie", 22));

        // 将List存储到txt文件中
        serializeList(studentList, "students.txt");

        // 从txt文件读取内容并打印List
        List<Student> deserializedList = deserializeList("students.txt");
        printList(deserializedList);
    }

    private static void serializeList(List<Student> list, String fileName) {
        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(fileName))) {
            oos.writeObject(list);
            System.out.println("List已序列化到文件" + fileName);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static List<Student> deserializeList(String fileName) {
        List<Student> list = new ArrayList<>();
        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(fileName))) {
            list = (List<Student>) ois.readObject();
            System.out.println("从文件" + fileName + "中反序列化List成功");
        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
        return list;
    }

    private static void printList(List<Student> list) {
        for (Student student : list) {
            System.out.println(student);
        }
    }
}

class Student implements Serializable {
    private String name;
    private int age;

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

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

运行以上代码，会将List中的Student对象序列化到名为"students.txt"的txt文件中，并从该文件中反序列化List内容并打印出来。