## 概述 實際在開發中主要使用緩沖流.緩沖流 內部都包含了一個緩沖區,通過緩沖區讀寫,就可以 提高IO流的讀寫速度. 1. BufferedOutputStream:寫入數據到流中. 2. BufferedInputStream:讀取流中的數據. ## 輸出流 ~~~ BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(new FileOutputStream("1.txt")); //寫一個字節 bufferedOutputStream.write(97); //寫一個字節數組 bufferedOutputStream.write("hello".getBytes()); //只用關閉該流就可以了,它內部會處理文件流的 bufferedOutputStream.close(); ~~~ ## 輸入流 ~~~ File file = new File("1.txt"); if (file.exists()) { BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream(file)); byte[] bs = new byte[1024]; int len = 0; while ((len = bufferedInputStream.read(bs)) != -1) { System.out.println(new String(bs, 0, len)); } bufferedInputStream.close(); } else { System.out.println("文件不存在"); } ~~~