请教java和js编码问题

ByteArrayOutputStream bos = new ByteArrayOutputStream();

        DataOutputStream dos = new DataOutputStream(bos);

        PrintWriter out = response.getWriter();

        byte record[] = null;

        String r = "";

        try{

            dos.writeInt(2);//记录个数

            dos.writeInt(0);//任务类型

            dos.writeUTF("霸三国");//名称

            dos.writeInt(1);//  对话次数、物品件数、杀怪个数



            dos.writeInt(2);//任务类型

            dos.writeUTF("贞子");//名称

            dos.writeInt(1);//  对话次数、物品件数、杀怪个数

            record = bos.toByteArray();

            r = Arrays.toString(record);

            System.out.println(r);

            //打印出来的数组：

              //[0, 0, 0, 2, 0, 0, 0, 0, 0, 9, -23, -100, -72, -28, -72, -119, -27, -101, -67, 0, 0, 0, 1, 0, 0, 0, 2, 0, 6, -24, -76, -98, -27, -83, -112, 0, 0, 0, 1]

            request.setAttribute("bytearray", r);

            request.getRequestDispatcher("/ba.jsp").forward(request, response);

        }catch (Exception e){

            e.printStackTrace();

        }finally {

            dos.close();

            bos.close();

        }