public static void sendJsonData(String data)

  {

    ActionContext ac = ActionContext.getContext();

    HttpServletResponse response = (HttpServletResponse)ac.get("com.opensymphony.xwork2.dispatcher.HttpServletResponse");

    response.setContentType("text/html;charset=utf-8");

    try {

      PrintWriter pw = response.getWriter();

      pw.print(data);

    } catch (IOException e) {

      e.printStackTrace();

    }

  }