TestStream.java

package serializable;

import java.io.*;

public class TestStream {
    public static void main(String[] args) {
        Hero[] arr = new Hero[10];

        for (int i = 0; i < 10; i++) {
            arr[i] = new Hero("hero : " + (i + 1));
        }

        File file = new File("C:/Users/ASUS/Desktop/11.txt1");

        try (
                //文件输出流
                FileOutputStream fos = new FileOutputStream(file);
                ObjectOutputStream oos = new ObjectOutputStream(fos);

                //文件输入流
                FileInputStream fis = new FileInputStream(file);
                ObjectInputStream ois = new ObjectInputStream(fis);
        ) {
            for (int i = 0; i < 10; i++) {
                oos.writeObject(arr[i]);
            }
            for (int i = 0; i < 10; i++) {
                arr[i] = (Hero) ois.readObject();
                System.out.println(arr[i].name);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

//Hero.java

package serializable;

import java.io.Serializable;

public class Hero implements Serializable {
    private static final long serializableUID = 1L;
    public String name;
    public float hp;

    public Hero(String name){
        this.name = name;
    }
}

package stream;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import charactor.Hero;

public class TestStream {
	
    public static void main(String[] args) {
    	int length = 10;
        Hero[] hs = new Hero[length];

        // 初始化对象数组
        System.out.println("输入对象序列：");
        for (int i=0; i<hs.length; i++) {
        	hs[i] = new Hero();
        	hs[i].name = Integer.toString(i);
        	System.out.println("Hero: "+hs[i].name);
        }
        
        // 准备一个文件保存对象序列
        File f = new File("d:/LOLFolder/heros.lol");
        
        try(
        	FileOutputStream fos = new FileOutputStream(f);
        	FileInputStream fis = new FileInputStream(f);
        	ObjectOutputStream oos = new ObjectOutputStream(fos);
        	ObjectInputStream ois = new ObjectInputStream(fis);
        	)
        {
        	oos.writeObject(hs);
        	Hero[] hs2 = (Hero[]) ois.readObject();
        	System.out.println("输出对象序列：");
        	for (int i=0; i<hs2.length; i++) {
        		System.out.println("Hero: " + hs2[i].name);
        	}
        } catch (IOException e) {
        	e.printStackTrace();
        } catch (ClassNotFoundException e) {
        	e.printStackTrace();
        }
    }
    
}

File f = new File("C:\\Users\\ljbeiji\\Desktop\\Test Folder\\xyz\\heros.lol");
if (!f.exists())
    f.createNewFile();
Hero[] heroes = new Hero[10];
for (int i = 0; i < heroes.length; i++)
    heroes[i] = new Hero("Hero:" + i, i * 10.0f);
try (FileOutputStream fos = new FileOutputStream(f);
     ObjectOutputStream oos = new ObjectOutputStream(fos);
     FileInputStream fis = new FileInputStream(f);
     ObjectInputStream ois = new ObjectInputStream(fis)) {
    oos.writeObject(heroes);
    //将整个对象数组读取到新的英雄数组里
    Hero[] heroes1 = (Hero[]) ois.readObject();
    //然后遍历读取出来的对象数组
    for (int i = 0; i < 10; i++)
        System.out.println(heroes1[i].name);
} catch (IOException | ClassNotFoundException e) {
    e.printStackTrace();
}

//一开始理解错了，出错的代码段
//将原始英雄数组序列化到文件
oos.writeObject(heros);
//将反序列化数据赋给新的英雄数组
Hero[] heros1 = new Hero[10];
for (int i = 0; i < 10; i++) {
    heros1[i] = (Hero) ois.readObject();
    System.out.println(heros1[i].name);
}
//上面的代码错在for循环的第一条语句，heros1[i]是Hero类型，而ois.readObject()是Hero[]类型，所以强制转换会报错
//改成我提交的代码就好了

public static void void4(){
        Hero [] hero =new Hero[10];
        Hero []h2=new Hero[10];
        for(int i=0;i<10;i++){
            hero[i]=new Hero();
            h2[i]=new Hero();
            hero[i].name="hero"+i;
        }
        for(int i=0;i<10;i++){
            System.out.println(hero[i].name);
        }
        File f=new File("C:/Users/yang.hang1/Downloads/2.txt");
        try(FileOutputStream fos=new FileOutputStream(f);ObjectOutputStream oos=new ObjectOutputStream(fos);
                FileInputStream fis =new FileInputStream(f);ObjectInputStream ois=new ObjectInputStream(fis);
        ){
            for(int i=0;i<10;i++){
                oos.writeObject(hero[i]);
                 h2[i]= (Hero) ois.readObject();
                System.out.println(h2[i].name);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }