老师我这样写有什么需要改进的吗？

import java.io.*;

public class Test {
Product product1 = new Product(123,"ipone","telephone",4888.0);
Product product2 = new Product(234,"ipad","computer",5088.0);
Product product3 = new Product(345,"macbook","computer",10688.0);
Product product4 = new Product(256,"iwatch","watch",4799.0);
public static void main(String[] args) {
Test test = new Test();
test.method1();
test.method2();
test.method3();
test.method4();

}

public void method1(){
try {
FileOutputStream fos1 = new FileOutputStream("imooc.txt");
ObjectOutputStream oos1 = new ObjectOutputStream(fos1);
FileInputStream fos2 = new FileInputStream("imooc.txt");
ObjectInputStream oos2 = new ObjectInputStream(fos2);
oos1.writeObject(product1);
oos1.flush();
try {
Product product = (Product) oos2.readObject();
System.out.println(product);
System.out.println();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
fos1.close();
oos1.close();
fos2.close();
oos2.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}

JT987 2019-10-24

源自：Java输入输出流 5-3 自由编程

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1回答

好帮手慕酷酷 2019-10-25 10:31:38

同学你好，代码编写的不错，但是还有点小问题，

1、Test类中没有method2，method3，method4方法，建议同学将其删除。

如：

2、建议同学将其他几个Product类对象也进行写入并读取，将代码补充完整哦~

如：

修改后的代码如下：

import java.io.*;

public class Test {
	Product product1 = new Product(123, "ipone", "telephone", 4888.0);
	Product product2 = new Product(234, "ipad", "computer", 5088.0);
	Product product3 = new Product(345, "macbook", "computer", 10688.0);
	Product product4 = new Product(256, "iwatch", "watch", 4799.0);

	public static void main(String[] args) {
		Test test = new Test();
		test.method1();
//		test.method2();
//		test.method3();
//		test.method4();

	}

	public void method1(){
        try {
            FileOutputStream fos1 = new FileOutputStream("imooc.txt");
            ObjectOutputStream oos1 = new ObjectOutputStream(fos1);
            FileInputStream fos2 = new FileInputStream("imooc.txt");
            ObjectInputStream oos2 = new ObjectInputStream(fos2);
            oos1.writeObject(product1);
            oos1.writeObject(product2);
            oos1.writeObject(product3);
            oos1.writeObject(product4);
            
            oos1.flush();
            try {
                Product product1 = (Product) oos2.readObject();
                System.out.println(product1);
                Product product2 = (Product) oos2.readObject();
                System.out.println(product2);
                Product product3 = (Product) oos2.readObject();
                System.out.println(product3);
                Product product4 = (Product) oos2.readObject();
                System.out.println(product4);
                System.out.println();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
            fos1.close();
            oos1.close();
            fos2.close();
            oos2.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }catch (IOException e) {
            e.printStackTrace();
        }
    }
}

如果我的回答解决了你的疑惑，请采纳！祝学习愉快！

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