@Test

public void test2() {

    //转换流

    InputStreamReader isr = null;

    OutputStreamWriter osw = null;

    try {

        //节点流

        FileInputStream fis = new FileInputStream("水浒传.txt");

        FileOutputStream fos = new FileOutputStream("水浒传_gbk.txt");

        //转换流

           isr = new InputStreamReader(fis, "utf-8");

        osw = new OutputStreamWriter(fos, "gbk");

        //复制文件

        char[] cbuf = new char[20];

        int len;

        while ((len = isr.read(cbuf)) != -1) {

            osw.write(cbuf, 0, len);

        }

        System.out.println("复制成功");

    } catch (Exception e) {

        e.printStackTrace();

    } finally {

        if(osw != null) {

            try {

                osw.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

        if(isr != null) {

            try {

                isr.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }

}