ajax的json传值方式在jsp页面中的应用

String rtn = "";
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
rtn = JsonUtil.JsonFromObject(obj);
pw = response.getWriter();
pw.write(rtn);
pw.flush();
pw.close();
}
}