直接上代码：获取指定目录及子目录下所有txt文件的个数，并将这些txt文件复制到D盘下任意目录

梦里梦外; 2024-04-19 10:31 79阅读 0赞

/**
         * 2.获取指定目录及子目录下所有txt文件的个数，
         * 并将这些txt文件复制到D盘下任意目录
         */
        public static void fun2(File f1, File f2) {
            File[] files = f1.listFiles();
            for (File file :
                    files) {
                if (file.isFile()) {
                    String newFilePaht = f2.getAbsolutePath() + "\\" + file.getName();
                    f2 = new File(newFilePaht);
                    FileCopyUtils.copy(file, f2);
                } else {
                    fun2(file, f2);
                }
            }
        }
    
    
    
    /**
     * 文件copy类
     */
    public class FileCopyUtils {
    
        public static void copy(File f1, File f2) {
            FileInputStream fis = null;
            FileOutputStream fos = null;
            try {
                fis = new FileInputStream(f1);
                fos = new FileOutputStream(f2);
    
    
                FileStreamUtils.copy(fis,fos);
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                FileStreamUtils.close(fis,fos);
            }
        }
    }
    
    
    
    /**
     * 流工具类
     */
    public class FileStreamUtils {
    
        /**
         * 拷贝
         * @param is
         * @param os
         */
        public static void copy(InputStream is, OutputStream os) {
            try {
                byte[] buf = new byte[1024];
                int len = 0;
                while ((len = is.read(buf)) != -1) {
                    os.write(buf, 0, len);
    
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
        /**
         * 关流
         * @param is
         * @param os
         */
        public static void close(InputStream is, OutputStream os){
            try {
                if (is != null)
                    is.close();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (os != null)
                        os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }