Java关键字——transient

当使用Serializable接口实现序列化操作时，如果一个对象中的某一属性不希望被序列化，则可以使用transient关键字进行声明

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
 
//=================================================
// File Name       :	Serializable_demo
//------------------------------------------------------------------------------
// Author          :	Common
 
//类名：Person_3
//属性：
//方法：
class Person_3 implements Serializable{		//此类的对象可以被序列化
	private transient String name;
	private int age;
 
	public Person_3(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}
 
	@Override
	public String toString() {
		return "姓名：" + name + ", 年龄：" + age;
	}
 
}
 
//主类
//Function        : 	Serializable_demo;
public class Serializable_demo {
 
	public static void main(String[] args) throws Exception {
		// TODO 自动生成的方法存根
//		File f = new File("/home/common/software/coding/HelloWord/HelloWord/test.txt");//路径
//		ObjectOutputStream oos = null;
//		OutputStream out = new FileOutputStream(f);		//文件输出流
//		oos = new ObjectOutputStream(out);						//为对象输出流实例化
//		oos.writeObject(new Person_3("张三", 30));
//		oos.close();
 
		File f = new File("/home/common/software/coding/HelloWord/HelloWord/test.txt");//路径
		ObjectInputStream ois = null;
		InputStream input = new FileInputStream(f);		//文件输入流
		ois = new ObjectInputStream(input);						//为对象输入流实例化
		Object obj = ois.readObject();									//读取对象
		ois.close();
		System.out.println(obj);
	}
 
}

<3>序列化一组对象

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
 
//=================================================
// File Name       :	Serializable_demo
//------------------------------------------------------------------------------
// Author          :	Common
 
//类名：Person_3
//属性：
//方法：
class Person_3 implements Serializable{		//此类的对象可以被序列化
//	private transient String name;
	private String name;
	private int age;
 
	public Person_3(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}
 
	@Override
	public String toString() {
		return "姓名：" + name + ", 年龄：" + age;
	}
 
}
 
//主类
//Function        : 	Serializable_demo;
public class Serializable_demo {
 
	public static void main(String[] args) throws Exception {
		// TODO 自动生成的方法存根
//		File f = new File("/home/common/software/coding/HelloWord/HelloWord/test.txt");//路径
//		ObjectOutputStream oos = null;
//		OutputStream out = new FileOutputStream(f);		//文件输出流
//		oos = new ObjectOutputStream(out);						//为对象输出流实例化
//		oos.writeObject(new Person_3("张三", 30));
//		oos.close();
 
//		File f = new File("/home/common/software/coding/HelloWord/HelloWord/test.txt");//路径
//		ObjectInputStream ois = null;
//		InputStream input = new FileInputStream(f);		//文件输入流
//		ois = new ObjectInputStream(input);						//为对象输入流实例化
//		Object obj = ois.readObject();									//读取对象
//		ois.close();
//		System.out.println(obj);
 
		Person_3 per[] = {new Person_3("张三",30),new Person_3("李四",31),new Person_3("王五",32)};//定义对象数组
		ser(per);					//序列化对象数组
		Object o[] = dser();
		for(int i=0;i<o.length;i++){
			Person_3 p = (Person_3) o[i];
			System.out.println(p);
		}
	}
 
	public static void ser(Object obj[]) throws Exception{
		File f = new File("/home/common/software/coding/HelloWord/HelloWord/test.txt");//路径
		ObjectOutputStream oos = null;
		OutputStream out = new FileOutputStream(f);		//文件输出流
		oos = new ObjectOutputStream(out);						//为对象输出流实例化
		oos.writeObject(obj);
		oos.close();
	}
 
	public static Object[] dser() throws Exception{
		File f = new File("/home/common/software/coding/HelloWord/HelloWord/test.txt");//路径
		ObjectInputStream ois = null;
		InputStream input = new FileInputStream(f);		//文件输入流
		ois = new ObjectInputStream(input);						//为对象输入流实例化
		Object obj[] = (Object[])ois.readObject();				//读取对象数组
		ois.close();
		return obj;
	}
 
}