Java序列化中子类、父类构造函数问题实例分析

package com.imooc.io;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;public class ObjectSeriaDemo2 {  public static void main(String[] args) throws Exception{     ObjectOutputStream oos = new ObjectOutputStream(         new FileOutputStream("demo/obj1.dat"));     Foo2 foo1 = new Foo2();  //创建对象的时候，递归调用了父类的构造函数     oos.writeObject(foo1);     oos.flush();     oos.close();     //反序列化是否递归调用父类的构造函数，不能证明     ObjectInputStream ois = new ObjectInputStream(         new FileInputStream("demo/obj1.dat"));     Foo2 foo2 = (Foo2)ois.readObject();     System.out.println(foo2);     ois.close();     ObjectOutputStream oos1 = new ObjectOutputStream(         new FileOutputStream("demo/obj1.dat"));     Bar2 bar1 = new Bar2();     oos1.writeObject(bar1);     oos1.flush();     oos1.close();     ObjectInputStream ois1 = new ObjectInputStream(         new FileInputStream("demo/obj1.dat"));     Bar2 bar2 = (Bar2)ois1.readObject();     System.out.println(bar2);     ois1.close();     /*     * 对子类对象进行反序列化操作时，     * 如果其父类没有实现序列化接口     * 那么其父类的构造函数会被调用     */  }}/* *  一个类实现了序列化接口，那么其子类都可以进行序列化 */class Foo implements Serializable{  public Foo(){     System.out.println("foo...");  }}class Foo1 extends Foo{  public Foo1(){     System.out.println("foo1...");  }}class Foo2 extends Foo1{  public Foo2(){     System.out.println("foo2...");  }}class Bar{  public Bar(){     System.out.println("bar");  }}class Bar1 extends Bar{  public Bar1(){     System.out.println("bar1..");  }}class Bar2 extends Bar1 implements Serializable{  public Bar2(){     System.out.println("bar2...");  }}