Java:从inputStream读取并写入outputStream的最有效方法(加上一些修改)

import java.io.*;

public class StreamCopyExample {
    public static void copy(InputStream inputStream, OutputStream outputStream) throws IOException {
        byte[] buffer = new byte[8192]; // 8KB缓冲区大小
        int bytesRead;
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }
    }

    public static void main(String[] args) {
        try {
            FileInputStream fileInputStream = new FileInputStream("input.txt");
            FileOutputStream fileOutputStream = new FileOutputStream("output.txt");
            copy(fileInputStream, fileOutputStream);
            fileInputStream.close();
            fileOutputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}