后台判断修改成功与否，前台alert弹出成功失败
后台： spServerService.insertSpServer(spServer);if(spServer.getId().toString()!=""){request.setAttribute("error", "添加成功!");}前台： <%String error = (String)request.getAttribute("error");%>function error(){var error = '<%=error%>';if(error!="null"){alert(error);}} <body onload="error();">