Java序列化流-ObjectOutputStream、ObjectInputStream

Java对象流的基本概念：

实例代码：

实体类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类：

 import java.io.*;
 import java.util.ArrayList;
 
 public class Main {
 
     public static void main(String[] args) throws IOException, ClassNotFoundException {
         //1.定义1个存储user的ArrayList集合
         ArrayList<User> list = new ArrayList<>();
 
         //2.往ArrayList集合中存储User对象
         list.add(new User(1,"张三"));
         list.add(new User(2,"李四"));
         list.add(new User(3,"王五"));
 
         //3.创建一个序列化流ObjectOutputSteam对象
         ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("t.txt"));
 
         //4.使用ObjectOutputSteam对象的方法writeObject,对集合进行序列化
         oos.writeObject(list);
 
         //5.创建一个反序列化流ObjectInputSteam对象
         ObjectInputStream ois = new ObjectInputStream(new FileInputStream("t.txt"));
 
         //6.使用ObjectInputStream对象的方法readObject,读取文件中保存的集合
         Object o = ois.readObject();
 
         //7.把Object类型的集合转换为ArrayList类型
         ArrayList<User> list2 = (ArrayList<User>) o;
 
         //8.遍历ArrayList集合
         for (User user : list2) {
             System.out.println(user);
         }
 
         //9.释放资源
         oos.close();
         ois.close();
 
     }
 }

项目结构目录：