JAVA io流笔记09 对象处理流

package FileText;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

//对象处理流
//反序列化：输入流 ObjectInputStream 主要方法：readObject()
//序列化：输出流 ObjectOutputStream 主要方法：writeObject()

//注意：先序列化后反序列化，并且序列化，反序列化顺序必须一致
//并非所有对象都可以实现序列化 ,必需继承 java.io.Serializable /或者直接继承Serializable
//并非所有属性都必须序列化，不想序列化的可以使用transient

public class ObjectInputStream09 {
public static void main(String args[]) throws IOException, ClassNotFoundException{
   change();
}
public static void change() throws ClassNotFoundException, IOException{
   Employee emp = new Employee("player",100000);
   //创建源
   File file = new File("D:/text/dd/ObjectText.txt");
   //选择流
   ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file)));
   out.writeObject(emp);
   out.flush();

   getchange(file);
}

public static void getchange(File file) throws ClassNotFoundException{
   try {
       ObjectInputStream input = new ObjectInputStream(new BufferedInputStream(new FileInputStream(file)));
       Object obj = input.readObject();
       if(obj instanceof Employee){
           Employee emp =(Employee)obj;

           System.out.println(emp.getName());
           System.out.println(emp.getSalary());
           //输出结果为null 100000.0//因为name使用了 transient 所以并未序列化
       }
   } catch (FileNotFoundException e) {
       e.printStackTrace();
   } catch (IOException e) {
       e.printStackTrace();
   }
}
}

class Employee implements java.io.Serializable{ //例子
   private transient String name = "wu"; //不想序列化的属性
   private double salary = 100000;
   //生成get，set，方法以及带参构造，无参构造
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
   public double getSalary() {
       return salary;
   }
   public void setSalary(double salary) {
       this.salary = salary;
   }
   public Employee(String name, double salary) {
       super();
       this.name = name;
       this.salary = salary;
   }
   public Employee() {
       super();
   }

}

JAVA io流笔记09 对象处理流

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