How to correctly pass the value of the INPUT form element to the JAVA code?

Question

JavaScript

Hello.

The jsp page
has an INPUT input element, there is a JAVA method Get_ID_WindowsService, which returns the ID of the Windows service

<input id = "service_name" value="termservice" />

<%!
public String Get_ID_WindowsService(String serviceName) throws UnsupportedEncodingException {
String executeCmd = "cmd /c sc queryex \"" + serviceName + "\"";
String line;
Process runtimeProcess;
 String Response = "";
        try {
            runtimeProcess = Runtime.getRuntime().exec(executeCmd);
            BufferedReader input = new BufferedReader(new InputStreamReader(runtimeProcess.getInputStream(),"cp866"));
int processComplete = runtimeProcess.waitFor();
            while ((line = input.readLine()) != null) {
                Response = Response + "\n" + line;
            }
            input.close();
  int start = Response.indexOf("ID_процесса");
  if (start < 0)
    start = Response.indexOf("PID");
  String status = "Error";
  if (start > 0)
  {
    status = Response.substring(start, Response.indexOf('\n',start)).trim();
    status = status.split(" ")[status.split(" ").length-1];
  }
Response=status;
        } catch (Exception e) {
            Response=Runtime.class.getName() + " (" + e.getClass().getName() + ") " + e.getMessage();
            return Response;
        }
        return Response;
  }
%>

there is a button

<input type="button" id="get_id_service" value="Получить PID" />

on pressing, which would like the information from INPUT to go to the JAVA method Get_ID_WindowsService and the result was displayed on this page, preferably without reloading.
What is the best way to do this?