通过IP地址将消息/打印机命令发送到网络打印机

Question

尝试通过网络将消息和打印命令发送到打印机。我无法连接到IP地址。

try {
Socket socket = new Socket("192.168.100.11", 9100);
DataOutputStream  dataOutputStream = new DataOutputStream(socket.getOutputStream());
command = "Testing ";
dataOutputStream.writeUTF(command);
response = dataInputStream.readUTF();

dataOutputStream.close();
socket.close();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}