为什么不复制这个类，复制内部文件夹

Question

我创建了一个复制类，它接受源文件夹和目标文件夹以及一个文件名数组。因此，该类搜索源文件夹，如果遇到与数组元素同名的文件，则将该文件复制到与源文件夹结构相同的文件夹结构中。下面是课程：

public class Copy {
    File src, dest; 
    ArrayList array;

    public Copy(File source, File destination ,ArrayList array) throws IOException{
        this.src = source;
        this.dest = destination;
        this.array = array;

        if(source.isDirectory()){

            //list all the directory contents
            String files[] = source.list();
            for (String element : files){ //Serch in all the files and if it match with a selected format, copies it directory
                if(array.contains(element)){
                    destination.mkdir();
                }
            };

            for (String file : files) {
            //construct the src and dest file structure
            File srcFile = new File(source, file);
            File destFile = new File(destination, file);
            //recursive copy

                new Copy(source,destination, array);
            }
        }
        else{
            //dest.mkdir();
            if(array.contains(source.getName())){
                //if file, then copy it
                //Use bytes stream to support all file types

                InputStream in = new FileInputStream(source);
                OutputStream out = new FileOutputStream(destination); 

                byte[] buffer = new byte[1024];

                int length;
                //copy the file content in bytes 
                while ((length = in.read(buffer)) > 0){
                    out.write(buffer, 0, length);
                }

                in.close();
                out.close();
                System.out.println("File copied from " + source + " to " + destination);
            }
        }
    }
}

- Main Folder
    -Inner Folder1
      -File.pdf
    -Inner Folder2

- Main Folder
    -Inner Folder1
        -Inner Inner Folder1
            -File.pdf
    -Inner Folder2

指向这一行:`新的复制文件(src、dest、array)；

有什么解决的办法吗？

Answer 1

我很想用毒刺：

public Copy(String source, String destination ,ArrayList array) throws IOException{
    this.src = new File(source);
    this.dest = new File(destination);

在循环中，您遍历每个文件，但使用相同的源和目标

       for (String file : files) {
        //construct the src and dest file structure
        File srcFile = new File(source, file);
        File destFile = new File(destination, file);
            new Copy(source,destination, array);
        }