ObjectInputStream

import java.io.*;
public class Main {
    public static void main(String[] args) throws Exception {
        String path = "./data.txt";
        boolean append = false;
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(path, append));
        oos.writeObject(new Person("张三", 18));
        oos.writeInt(100);
        oos.writeUTF("quwgeuiy");
        oos.close();
        System.out.println("已经写入本地文件");
    }
}
class Person implements Serializable {
    private String name;
    private int age;
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
    @Override
    public String toString() {
        return "A{" +
                "age=" + age +
                ", name='" + name + '\'' +
                '}';
    }
}