IO流应用 -2025/1/2

拷贝文件夹

private static void copydir(File src, File dest) throws IOException {
        dest.mkdirs();
        File[] files = src.listFiles();
        for (File file : files) {
            if (file.isFile()) {
                FileInputStream fis = new FileInputStream(file);
                FileOutputStream fos = new FileOutputStream(new File(dest, file.getName()));
                byte[] bytes = new byte[1024];
                int len = 0;
                while((len = fis.read(bytes)) != -1){
                    fos.write(bytes,0,len);
                }
                fos.close();
                fis.close();
            }
            else {
                copydir(file, new File(dest, file.getName()));
            }
        }
    }