Java-通过ISO8583通过网络发送数据

Question

Im trying to send iso8583 data over a network connection, currently when i send the data it is showing in TCP viewer as one long string

but it should look like this

0000(0000)  30 38 30 30 82 38 00 00  00 00 00 00 04 00 00 00   0800.8..........
0016(0010)  00 00 00 00 30 38 32 34  31 30 35 31 30 30 31 33   ....082410510013
0032(0020)  35 31 30 30 31 33 35 31  30 30 30 38 32 34 33 30   5100135100082430
0048(0030)  31                                                 1

my code for sending the data

Socket plug = new Socket(Config.getServerIP(), Config.getServerPort());
DataInputStream In= new DataInputStream(plug.getInputStream());
PrintWriter Out = new PrintWriter(plug.getOutputStream());

String Indata, Outdata;
Outdata =" ";
Indata = "NOTHING";

while (!Outdata.equals("Bye"))
{
  Outdata=message;
  Out.write(Outdata);
  Out.flush();

  if (!Outdata.equals("Bye"))
  {
    Indata=In.readLine();
    System.out.println(Indata);
  }
}
In.close();
Out.close();

Does the data have to be sent in a specific way? Any help much appreciated.

Answer 1

It turns out that the problem was that i had to write the output using a byte array of integers, this in turn shows in TCP viewer as Hex data, the next issue i faced was that any integer in the byte array over 128 was causing an overflow to by pass that i had to use the following methods

Socket server = new Socket(Config.getServerIP(), Config.getServerPort());
bytes = packData(bytes);
    server.getOutputStream().write(bytes, 0, bytes.length);

then the packData method

static byte[] packData(byte[] data) {
    int len = data.length;
    byte buf[] = new byte[len + 2];
    buf[0] = (byte) (len >> 8 & 255);
    buf[1] = (byte) (len & 255);
    System.arraycopy(data, 0, buf, 2, len);
    return buf;
}

Hope this helps someone