Java序列化之transient和serialVersionUID的使用

 package FileDemo;

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

 class Person implements Serializable {
     /*
      * 接口标记，需要被序列化的对象必须实现Serializable接口 否则会出现NotSerializableException异常
      */
     // 自定义 serialVersionUID，用于判断类和对象是否为同一版本
     private static final long serialVersionUID = 42L;
     private String name;
     /*
      * 非静态数据不想被序列化可以使用transien修饰
      */
     private transient int age;//用transie修饰后name将不会被序列化

     public Person(String name, int age) {
         super();
         this.name = name;
         this.age = age;
     }

     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 class ObjectStreamDemo {

     /**
      * @param args
      * @throws Exception
      */
     public static void main(String[] args) throws Exception {

         writeObject();
         readObject();
     }

     private static void readObject() throws Exception {
         ObjectInputStream ois = new ObjectInputStream(new FileInputStream(
                 "object.object"));
         Person obj = (Person) ois.readObject();
         System.out.println(obj.getName() + ":" + obj.getAge());
     }

     private static void writeObject() throws IOException, IOException {// 对象的序列化
         ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(
                 "object.object"));
         oos.writeObject(new Person("Java", 20));
         oos.writeObject(new Person("python", 40));
         oos.writeObject(new Person("linux", 50));
         oos.writeObject(new Person("ruby", 46));
         oos.close();
     }

 }