在流管道内增加缓存的数据，让我们使用流读取的文字更加的流畅 高级流—>创建通过低级流 这里只演示其中的一种，其他使用方式都是一样的 BufferedInputStream 构建方式 使用低级流构建 基本使用与低级流的方法完全一致 read() skip() available() close()
//创建缓冲流，用低级流构建 File file = new File(); //文件路径 FileInputStream fileinputstream = new FileInputStream(file); //字节型 BufferedInputStream bufferedinputstream = new BufferedInputStream(fileinputstream);//字节型缓冲 //BufferedInputStream 的使用方法和FileInputStream的方法一致 //在BufferedOutputStream写入的时候最好写flush()这个方法，在1.8版本前是需要写的，新版本做了优化可以不写下面是我写的一个例子
File file = new File("D:\\java_work\\TestFile\\abc.txt"); FileInputStream fileInputStream = null; BufferedInputStream bufferedInputStream = null; FileOutputStream fileOutputStream = null; BufferedOutputStream bufferedOutputStream = null; try { fileInputStream = new FileInputStream(file); bufferedInputStream = new BufferedInputStream(fileInputStream); int buffers = bufferedInputStream.available(); System.out.println("大小:" + buffers); byte[] bytes = new byte[10]; int code = bufferedInputStream.read(bytes); while (code != -1) { String value = new String(bytes, 0, code); System.out.println(value); code = bufferedInputStream.read(bytes); } System.out.println("----------------------------------------"); fileOutputStream = new FileOutputStream(file, true); bufferedOutputStream = new BufferedOutputStream(fileOutputStream); bufferedOutputStream.write('2'); bufferedOutputStream.flush(); int leg = bufferedInputStream.available(); byte[] b = new byte[leg]; int codes = bufferedInputStream.read(b); String values = new String(b, 0, codes); System.out.println("写入完成" + values); } catch (IOException e) { e.printStackTrace(); } finally { try { if (fileInputStream != null) { fileInputStream.close(); } } catch (IOException e) { e.printStackTrace(); } try { if (bufferedInputStream != null) { bufferedInputStream.close(); } } catch (IOException e) { e.printStackTrace(); } try { if (fileOutputStream != null) { fileOutputStream.close(); } } catch (IOException e) { e.printStackTrace(); } try { if (bufferedOutputStream != null) { bufferedOutputStream.close(); } } catch (IOException e) { e.printStackTrace(); } } System.out.println("-------------------------------------------------------------------------"); File file1 = new File("D:\\java_work\\TestFile\\abc.txt"); FileReader fileReader = null; BufferedReader bufferedReader = null; FileWriter fileWriter = null; BufferedWriter bufferedWriter = null; try { fileReader = new FileReader(file1); bufferedReader = new BufferedReader(fileReader); fileWriter = new FileWriter(file1); bufferedWriter = new BufferedWriter(fileWriter); bufferedWriter.write("静夜思-李白\n"); bufferedWriter.write( "床前明月光,\n" + "疑是地上霜,\n" + "举头望明月,\n" + "低头思故乡。"); bufferedWriter.flush(); char[] chars = new char[5]; int count = bufferedReader.read(chars); while (count != -1) { String value = new String(chars, 0, count); System.out.print(value); count = bufferedReader.read(chars); } } catch (IOException e) { e.printStackTrace(); } finally { try { if (fileReader != null) { fileReader.close(); } } catch (IOException e) { e.printStackTrace(); } try { if (bufferedReader != null) { bufferedReader.close(); } } catch (IOException e) { e.printStackTrace(); } try { if (fileWriter != null) { fileWriter.close(); } } catch (IOException e) { e.printStackTrace(); } try { if (bufferedWriter != null) { bufferedWriter.close(); } } catch (IOException e) { e.printStackTrace(); } }运行结果如图 在硬盘中文件的内容如图
