如何在Java中持久化ArrayList的控制台输入

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

public class ArrayListPersistence {

    public static ArrayList<Object> loadArrayList(String filename) {
        ObjectInputStream ois = null;
        try {
            ois = new ObjectInputStream(new FileInputStream(filename));
            @SuppressWarnings("unchecked") // Suppress unchecked cast warning
            ArrayList<Object> arr = (ArrayList<Object>) ois.readObject();
            return arr;
        } catch (IOException e) {
            System.err.println("Error loading ArrayList: " + e.getMessage()); // Improved error message
            return new ArrayList<>(); // Return a new empty ArrayList in case of error
        } catch (ClassNotFoundException e) {
            System.err.println("Error loading ArrayList (Class not found): " + e.getMessage()); // Improved error message
            return new ArrayList<>(); // Return a new empty ArrayList in case of error
        } finally {
            if (ois != null) {
                try {
                    ois.close();
                } catch (IOException e) {
                    System.err.println("Error closing ObjectInputStream: " + e.getMessage()); // Improved error message
                }
            }
        }
    }

    public static void saveArrayList(ArrayList<Object> arr, String filename) {
        ObjectOutputStream oos = null;
        try {
            oos = new ObjectOutputStream(new FileOutputStream(filename));
            oos.writeObject(arr);
        } catch (IOException e) {
            System.err.println("Error saving ArrayList: " + e.getMessage()); // Improved error message
        } finally {
            if (oos != null) {
                try {
                    oos.close();
                } catch (IOException e) {
                    System.err.println("Error closing ObjectOutputStream: " + e.getMessage()); // Improved error message
                }
            }
        }
    }

    public static void main(String[] args) {
        String filename = "myArrayList.ser";
        ArrayList<Object> myList = loadArrayList(filename);

        // Add some data to the ArrayList
        myList.add("Item 1");
        myList.add(123);
        myList.add(new User("Alice", 1));

        // Save the ArrayList to the file
        saveArrayList(myList, filename);

        System.out.println("ArrayList saved to " + filename);

        // Load the ArrayList from the file (for demonstration purposes)
        ArrayList<Object> loadedList = loadArrayList(filename);
        System.out.println("ArrayList loaded from " + filename);
        System.out.println("Loaded ArrayList: " + loadedList);
    }
}

class User implements Serializable { // Implement Serializable

    private static final long serialVersionUID = 1L; // Recommended for Serializable classes

    private String name;
    private int id;

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

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