【Java】复制多级文件夹

package LearnJava15;

import java.io.*;

public class CopyFoldersDemo {
    public static void main(String[] args) throws IOException {
//        数据源
        File srcFile=new File("D:\\MyProject\\Java\\Demo2\\test\\test2");
//        目的源
        File destFile=new File("D:\\MyProject\\Java\\Demo2\\myCharSTream");

        copyFolder(srcFile,destFile);
    }
//复制文件夹
    private static void copyFolder(File srcFile, File destFile) throws IOException {
        if (srcFile.isDirectory()){
            String srcFileName = srcFile.getName();
            File newFolder = new File(destFile,srcFileName);
//            判断是否存在
            if (!newFolder.exists()){
                newFolder.mkdir();
                File[] filesArray = srcFile.listFiles();

                for (File file:filesArray){
                    copyFile(file,newFolder);
                }
            }else {
//                如果是文件，直接使用字节流
                File newFile =new File(destFile,srcFile.getName());
                copyFile(srcFile,newFile);
            }
        }
    }

    //    复制文件
    private static void copyFile(File srcFile, File destFile) throws IOException {
        BufferedInputStream bis=new BufferedInputStream(new FileInputStream(srcFile));
        BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(destFile));

        byte[] bys=new byte[1024];
        int len;
        while ((len=bis.read(bys))!=-1){
            bos.write(bys,0,len);
        }
        bos.close();
        bis.close();
    }
}