一直没用过 new try 记录一下

private static void customBufferStreamCopy(File source, File target) {try (InputStream fis = new FileInputStream(source);OutputStream fos = new FileOutputStream(target)){byte[] buf = new byte[8192];int i;while ((i = fis.read(buf)) != -1) {fos.write(buf, 0, i);}}catch (Exception e) {e.printStackTrace();}}