后台js弹提示

StringBuffer sb=new StringBuffer();

                         try{

                                sb.append("<script> location.href=\"member_index.html\";</script>");

                         }catch(RuntimeException e){

                                this.showErrorJson(e.getMessage());

                         }

                        

                         HttpServletResponse response  = ThreadContextHolder.getHttpResponse();

                         response.setCharacterEncoding("utf-8");

                         response.setHeader("Cache-Control", "no-cache");

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

                         try{

                                PrintWriter pw=response.getWriter();

                                pw.print(sb.toString());

                         }catch (Exception e) {

                                // TODO: handle exception

                            }