package stream;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import javax.security.auth.login.AccountException;

import org.junit.jupiter.api.Test;

/*
 * 對(duì)象流
 *   用與存儲(chǔ)和讀取基本數(shù)據(jù)類型數(shù)據(jù) 或 對(duì)象的處理劉。它的強(qiáng)大之處就是可以把java中的對(duì)象轉(zhuǎn)換成流
 * 
 * */

public class ObjectInputStreamTeat {
  /*
   * 序列化過程：將內(nèi)存中的java對(duì)象保存到磁盤或通過網(wǎng)絡(luò)傳輸出去
   * 使用ObjectOutputStream 
   * */
  @Test
  public void testObjectOutputStream() {
    ObjectOutputStream oos = null;
    try {
      oos = new ObjectOutputStream(new FileOutputStream("Object.dat"));
      oos.writeObject(new String("我是中國人"));
      oos.flush();
      
      oos.writeObject(new Person("zsben",1,new Account(2000)));
      oos.flush();
      
    } catch (Exception e) {
      e.printStackTrace();
    }
    finally {
      try {
        if(oos!=null)
          oos.close();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
  
  /*
   * 反序列化:用ObjectInputStream實(shí)現(xiàn)
   * */
  @Test
  public void testObjectInputStream() {
    ObjectInputStream ois = null;
    try {
      ois = new ObjectInputStream(new FileInputStream("Object.dat"));
      Object object = ois.readObject();
      String string = (String)object;
      System.out.println(string);
      
      Object object2 = ois.readObject();
      Person person = (Person)object2;
      System.out.println(person);
      
    } catch (Exception e) {
      e.printStackTrace();
    }
    finally {
      try {
        if(ois!=null)
          ois.close();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
}
/*
 * 1.Person類要實(shí)現(xiàn)可序列化，必須實(shí)現(xiàn)可序列化接口Serializable
 * 2.還需要添加一個(gè)最終類屬性UID
 * 3.除了當(dāng)前Person類需要實(shí)現(xiàn)Serializable，還要保證其內(nèi)部所有屬性都是可序列化的
 *   (默認(rèn)情況下基本數(shù)據(jù)類型為可序列化)
 * 對(duì)象流不能序列化static 和transient修飾的成員
 * */
class Person implements Serializable{
  public static final long serivalVersionUID = 5432146546351568416L;
  
  private String name;
  private static int age;
  private Account account; 
  @Override
  public String toString() {
    return "Person [name=" + name + ", age=" + age + ", account=" + account + "]";
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public Person(String name, int age) {
    super();
    this.name = name;
    this.age = age;
  }
  
  public Person(String name, int age, Account account) {
    super();
    this.name = name;
    this.age = age;
    this.account = account;
  }
  public Person() {
    super();
  }  
}
class Account implements Serializable{
  private double balance;
  static final public long serivalVersionUID = 54685237864535874L;
  @Override
  public String toString() {
    return "Account [balance=" + balance + "]";
  }

  public double getBalance() {
    return balance;
  }

  public void setBalance(double balance) {
    this.balance = balance;
  }

  public Account(double balance) {
    super();
    this.balance = balance;
  }

  public Account() {
    super();
  }
}