Java 序列化的简介说明

Java序列化的简介说明

Java序列化的功能：将一个对象转换为字节序列,
序列中包含了对象数据和对象中数据的类型信息

Java序列化后有助于对象的传输和对象持久化

Java对象想序列化必须满足以下两个条件:
   1.必须继承java.io.Serializable 接口
   2.所有属性必须是可序列化

Java 序列化对象和反序列化对象的示例

/*
User.java
*/
public class User implements java.io.Serializable
{
   public String name;
}

/*
序列化对象 
*/

import java.io.*;
 
public class TestMain
{
   public static void main(String [] args)
   {
      User user = new User();
      user.name = "java265.com"; 
      try
      {
         FileOutputStream fileOut =
         new FileOutputStream("D:\test\user.txt");
         ObjectOutputStream out = new ObjectOutputStream(fileOut);
         out.writeObject(e);
         out.close();
         fileOut.close();
         System.out.printf("序列化数据已存入user.txt中");
      }catch(IOException i)
      {
          i.printStackTrace();
      }
   }
}


/*反序列化示例*/

import java.io.*;
 
public class TestMain
{
   public static void main(String [] args)
   {
      User user = null;
      try
      {
         FileInputStream fileIn = new FileInputStream("D:\test\user.txt");
         ObjectInputStream in = new ObjectInputStream(fileIn);
         user = (User) in.readObject();
         in.close();
         fileIn.close();
      }catch(IOException i)
      {
         i.printStackTrace();
         return;
      }catch(ClassNotFoundException c)
      {
         System.out.println("User class not found");
         c.printStackTrace();
         return;
      }
      System.out.println("反序列化成功...");
      System.out.println("Name: " + user.name); 
    }
}