BIO与NIO读写文件对比

1. BIO: blocking input/output  同步阻塞

 public static void fileTest() throws Exception {
        FileWriter fileWriter = new FileWriter(filePath, true);
        fileWriter.write("nihao");
        fileWriter.close();

        FileReader fileReader = new FileReader(filePath);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        StringBuffer bf = new StringBuffer();
        String str;
        while ((str = bufferedReader.readLine()) != null) {
            bf.append(str + "\n");
        }
        bufferedReader.close();
        fileReader.close();
        System.out.println(bf.toString());
    }

2.NIO: 同步非阻塞

 public static void fileNew() throws Exception {

     Files.write(Paths.get(filePath), "nihao".getBytes(StandardCharsets.UTF_8), StandardOpenOption.APPEND);

     byte[] data = Files.readAllBytes(Paths.get(filePath));
    System.out.println(new String(data, StandardCharsets.UTF_8));
    }