Java demo之IO

public class IOTest {



    //拷贝文件，文件夹均可
    public static void copyFile(String sourPath,String descPath){

        File file = new File(sourPath);
        if (!file.exists()){
            return;
        }
        String[] fileNames = file.list();
        if (fileNames==null){
            //拷贝文件
            try {
                InputStream inputStream = new FileInputStream(sourPath);
                OutputStream outputStream = new FileOutputStream(descPath);
                byte[] bytes = new byte[100];
                int i = -1;
                while ((i=inputStream.read(bytes))!=-1){
                    outputStream.write(bytes,0,i);
                }
                inputStream.close();
                outputStream.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            //确认是拷贝文件夹，创建目录
            new File(descPath).mkdir();
            for (String fileName:fileNames){
                String sour = sourPath+"/"+fileName;
                String desc = descPath+"/"+fileName;
                copyFile(sour,desc);
            }
        }

    }




}