复制 解析/编译

public static void main(String[] args) throws IOException {
    BufferedInputStream bis = new BufferedInputStream(new FileInputStream("javase2\\a.txt"));
    BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("d:\\hello\\a.txt"));
    byte[] by = new byte[1024];
    int leng;
    while ((leng = bis.read(by)) != -1) {
        bos.write(by,0,leng);
    }
    bis.close();
    bos.close();
}

public static void main(String[] args) throws UnsupportedEncodingException {
     String s="老溜";
     byte[] b=s.getBytes("utf-8");
    byte[] s1={-24, -128, -127, -26, -70, -100};
    String st=new String(s1);
    System.out.println(st);
    System.out.println(Arrays.toString(b));
    System.out.println(b.length);
}