Java序列化流-ObjectOutputStream、ObjectInputStream

Java對象流的基本概念：

實例代碼：

實體類User：

import java.io.Serializable;

/**
 * @author zsh
 * @company wlgzs
 * @create 2019-01-25 15:11
 * @Describe
 */
public class User implements Serializable {

    private Integer id;

    private String name;

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

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

Main類：

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

public class Main {

    public static void main(String[] args) throws IOException, ClassNotFoundException {
        //1.定義1個存儲user的ArrayList集合
        ArrayList<User> list = new ArrayList<>();

        //2.往ArrayList集合中存儲User對象
        list.add(new User(1,"張三"));
        list.add(new User(2,"李四"));
        list.add(new User(3,"王五"));

        //3.創建一個序列化流ObjectOutputSteam對象
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("t.txt"));

        //4.使用ObjectOutputSteam對象的方法writeObject,對集合進行序列化
        oos.writeObject(list);

        //5.創建一個反序列化流ObjectInputSteam對象
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("t.txt"));

        //6.使用ObjectInputStream對象的方法readObject,讀取文件中保存的集合
        Object o = ois.readObject();

        //7.把Object類型的集合轉換為ArrayList類型
        ArrayList<User> list2 = (ArrayList<User>) o;

        //8.遍歷ArrayList集合
        for (User user : list2) {
            System.out.println(user);
        }

        //9.釋放資源
        oos.close();
        ois.close();

    }
}

項目結構目錄：