i used rxtx serial api in spring frame work. i can use it in my local host but it doesnt working hosting site - web-hosting

Question

i used rxtx serial api in spring frame work.
i can use it in my local host but it doesnt working hosting site
i can not use rxtx serial communication jar in web page ?
""#SuppressWarnings("restriction")
public Map<String,Object> printbarcode(Map<String, Object> paramMap) throws Exception {
//new barcode
String barcode = String.valueOf(paramMap.get("barcode"));
String equipcd = String.valueOf(paramMap.get("equipcd"));
Map<String,Object> rtnMap = new HashMap<String, Object>();
System.out.println("barcode : " + barcode);
System.out.println("바코드 기기전송 서비스 call " + barcode);
RequestParams<EquipMasterVO> Params = new RequestParams<EquipMasterVO>();
Params.put("company", "1000");
Params.put("equipCd", "QRPRINTER");
List<EquipMasterVO> EquipList = equipMasterMapper.getEquipList(Params);
if(EquipList.size() > 0){
String EquipCd = EquipList.get(0).getEquipCd();
String EquipSpec = EquipList.get(0).getEquipSpec();
String EquipType = EquipList.get(0).getEquipType();
String EquipNm = EquipList.get(0).getEquipNm();
System.out.println("EquipCd : " + EquipCd);
System.out.println("EquipSpec : " + EquipSpec);
System.out.println("EquipType : " + EquipType);
System.out.println("Equip : " + EquipNm);
try{
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(EquipSpec);
System.out.println("portIdentifier : " + portIdentifier);
if (portIdentifier.isCurrentlyOwned())
{
System.out.println("Error: Port is currently in use");
//비정상 동작
rtnMap.put("MSG", "QR코드 인쇄처리 중 에러가 발생하였습니다. \n사용 중인 포트 입니다.");
}
else
{
CommPort commPort = portIdentifier.open(this.getClass().getName(), 2000);
if (commPort instanceof SerialPort)
{
SerialPort serialPort = (SerialPort) commPort;
serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
try {
// Add the serial port event listener
serialPort.addEventListener(new SerialEventHandler());
serialPort.notifyOnDataAvailable(true);
} catch (TooManyListenersException ex) {
System.err.println(ex.getMessage());
}
in = serialPort.getInputStream();
OutputStream out = serialPort.getOutputStream();
byte[] sendData = new byte[] {0x1b, 0x02, 0x00, 0x1c, 0x00, 0x00, 0x1e,
0x06, 0x51, 0x52, 0x43, 0x4f, 0x44, 0x45, 0x01, 0x04, 0x00, 0x03,
0x00, 0x03, 0x16, 0x03, 0x04, 0x00, 0x00, 0x01, 0x01, 0x09, 0x42,
0x32, 0x32, 0x30, 0x35, 0x30, 0x30, 0x35, 0x30, 0x1b, 0x03, 0x00};
byte[] sendPrintMessage = new byte[] { 0x1b, 0x02, 0x00, 0x01, 0x1b, 0x03, (byte)0xC4 };
byte[] sendStartPrintCommand = new byte[] { 0x1b, 0x02, 0x00, 0x11, 0x1b, 0x03, (byte)0xB4 };
byte[] qrData = barcode.getBytes();
System.arraycopy(qrData, 0, sendData, 28, qrData.length);
sendData[39] = ComputeAdditionChecksum(sendData);
out.write(sendData);
Thread.sleep(500);
out.write(sendPrintMessage);
Thread.sleep(500);
out.write(sendStartPrintCommand);
Thread.sleep(300);
if(keyVal)
{
//정상 동작
System.out.println("test good");
rtnMap.put("MSG", "QR코드 인쇄처리 되었습니다.");
}
else
{
//비정상 동작
System.out.println("test bad");
rtnMap.put("MSG", "QR코드 인쇄처리 중 에러가 발생하였습니다. \n시스템 관리자에게 문의하세요.");
}
serialPort.removeEventListener();
serialPort.close();
in.close();
out.close();
readBuffer = null;
keyVal = false;
}
else
{
//비정상 동작
System.out.println("Error: Only serial ports are handled by this example.");
rtnMap.put("MSG", "Error: Only serial ports are handled by this example.");
}
}
}catch (NoSuchPortException e) {
// TODO: handle exception
System.out.println("Error: Equip Port Nosuch");
rtnMap.put("MSG", "포트연결 에러");
}
}else{
//비정상 동작
System.out.println("설비가 존재하지 않습니다. 먼저 해당설비를 등록하세요.");
rtnMap.put("MSG", "설비가 존재하지 않습니다. 먼저 해당설비를 등록하세요.");
}
return rtnMap;
}
""""
i uesed this code and that code just liked with jsp button.