http://blog.csdn.net/lzm1340458776/article/details/37872095
java
private static void customBufferStreamCopyJDK7(File source, File target) { //try()-()写需要释放的资源,数据流会在 try 执行完毕后自动被关闭, //前提是,这些可关闭的资源必须实现 java.lang.AutoCloseable 接口 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(); } } // private static void customBufferStreamCopyOldJDK(File source, File target) { InputStream fis = null; OutputStream fos = null; try { fis = new FileInputStream(source); 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(); } finally { close(fis); close(fos); } } private static void close(Closeable closable) { if (closable != null) { try { closable.close(); } catch (IOException e) { e.printStackTrace(); } } }