【Java】字节流复制文本文件

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyTxtDemo {
    public static void main(String[] args) throws IOException {
        FileInputStream fis=new FileInputStream("D:\\MyProject\\Java\\LearnJava1\\src\\Demo4\\fos.txt");
        FileOutputStream fos=new FileOutputStream("D:\\MyProject\\Java\\LearnJava1\\src\\Demo4\\fos2.txt");

//        读写数据
        int by;
        while ((by=fis.read())!=-1){
            fos.write(by);
        }
//        释放资源
        fis.close();
        fos.close();
    }
}