Java中的transient

在代码中使用transient声明一个实例变量，并把对象序列化的时候不会被存储的，例如：

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

class Person implements Serializable {
private String username;
private transient int age;

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

public String toString() {
return "username: " + username + "\nage: " + age;
}

public static void main(String[] args) {
Person person = new Person("Hulk", 12);
System.out.println("save object before****************************");
System.out.println(person);


try {
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(
"person.txt"));

out.writeObject(person);
out.close();

Thread.sleep(2000);

ObjectInputStream input = new ObjectInputStream(new FileInputStream(
"person.txt"));

System.out.println("read object***********************************");

person = (Person) input.readObject();

System.out.println(person);

} catch (Exception e) {
e.printStackTrace();
}
}
}