JavaIO和JavaNIO

/* 字节IO */
    public void byteIO() throws FileNotFoundException, IOException {
        FileInputStream fin = new FileInputStream(new File(
                "D:\\test\\byteio_in.txt"));
        FileOutputStream fout = new FileOutputStream(new File(
                "D:\\test\\byteio_out.txt"));
        int c = -1;
        while ((c = fin.read()) != -1) {
            fout.write(c);
        }
        fin.close();
        fout.close();
    }

    /* 字符IO */
    public void charIO() throws FileNotFoundException, IOException {
        FileReader reader = new FileReader(new File("D:\\test\\chario_in.txt",
                ""));
        FileWriter writer = new FileWriter(new File("D:\\test\\chario_out.txt"));
        char[] charArr = new char[512];
        while (reader.read(charArr) != -1) {
            writer.write(charArr);
        }
        reader.close();
        writer.close();
    }

    /* bufferIO */
    public void bufferIO() throws FileNotFoundException, IOException {
        BufferedInputStream bufferReader = new BufferedInputStream(
                new FileInputStream("D:\\test\\bufferio_in.txt"));
        BufferedOutputStream bufferWriter = new BufferedOutputStream(
                new FileOutputStream("D:\\test\\bufferio_out.txt"));
        int c = -1;
        while ((c = bufferReader.read()) != -1) {
            bufferWriter.write(c);
        }
        bufferReader.close();
        bufferWriter.close();
    }

/* NIO */
    public void NIO() throws FileNotFoundException, IOException {
        FileInputStream fin = new FileInputStream("D:\\test\\nio_in.txt");
        FileOutputStream fout = new FileOutputStream("D:\\test\\nio_out.txt");
        FileChannel finChannel = fin.getChannel();
        FileChannel foutChannel = fout.getChannel();
        ByteBuffer buffer = ByteBuffer.allocate(512);
        while (finChannel.read(buffer) != 1)//读到缓存
        {
            buffer.flip();//指针跳到缓存头
            foutChannel.write(buffer);
            buffer.clear();//重置缓冲区
        }
        fin.close();
        fout.close();
    }