java代码如何实现将一个对象写入到文件中及从文件中读取对象呢?

今天接到一个需求，需将对象持久化到文件中，及文件转换为对象
    从这个需求的底层出发，这其实是一个文件序列化和反序列化的需求
	那么Java代码如何实现对象的序列化和反序列化操作呢?下文笔者将一一道来,如下所示

实现思路：
    1.实体类继承java.io.Serializable接口或其子接口java.io.Externalizable
	2.使用代码对其进行序列化和反序列化操作

//定义一个Person对象
Person.java

package com.java265;
import java.io.Serializable;
public class Person implements Serializable {
 	private static final long serialVersionUID = 1L;
	private String name;
	private int age;
	private String gender;
 
	Person() {
	};
 
	Person(String name, int age, String gender) {
		this.name = name;
		this.age = age;
		this.gender = gender;
	}
 
	@Override
	public String toString() {
		return "Name:" + name + "\nAge: " + age + "\nGender: " + gender;
	}
}


//使用java.io.ObjectOutputStream将对象转换为字节流,并写入到文件中
//WriterReader.java
 
package com.java265; 
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;
 
public class WriterReader {
 
	public static void main(String[] args) {
 
		Person p1 = new Person("maomao",18, "Male");
		Person p2 = new Person("liuxiaoqing",56, "Female");
 
		try {
			FileOutputStream f = new FileOutputStream(new File("test.txt"));
			ObjectOutputStream o = new ObjectOutputStream(f);
 
			// Write objects to file
			o.writeObject(p1);
			o.writeObject(p2);
 
			o.close();
			f.close();
 
			FileInputStream fi = new FileInputStream(new File("test.txt"));
			ObjectInputStream oi = new ObjectInputStream(fi);
 
			// Read objects
			Person pr1 = (Person) oi.readObject();
			Person pr2 = (Person) oi.readObject();
 
			System.out.println(pr1.toString());
			System.out.println(pr2.toString());
 
			oi.close();
			fi.close();
 
		} catch (FileNotFoundException e) {
			System.out.println("File not found");
		} catch (IOException e) {
			System.out.println("Error initializing stream");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}