transient关键字

     java的transient关键字为我们提供了便利，你只需要实现Serilizable接口，将不需要序列化的属性前添加关键字transient，序列化对象的时候，这个属性就不会序列化到指定的目的地中。

     

package test;



import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.io.Serializable;



public class Test {

	public static void main(String[] args) throws FileNotFoundException,

			IOException, ClassNotFoundException {

		A a = new A(25, "张三");

		System.out.println(a);

		

		

		ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("c://mm.txt"));

		oos.writeObject(a);

		oos.close();

		ObjectInputStream ois = new ObjectInputStream(new FileInputStream("c://mm.txt"));

		a = (A) ois.readObject();

		System.out.println(a);



	}



}



class A implements Serializable {

	int a;

	transient String b; //transient  使b属性没有进行序列化



	public A(int a, String b) {

		this.a = a;

		this.b = b;

	}



	public String toString() {

		return "a = " + a + ",b = " + b;

	}

}

　运行结果：

a = 25,b = 张三

a = 25,b = null