后台无法判断ajax请求的解决办法

var xhr = new XMLHttpRequest();xhr.open("get",remoteUrl);xhr.setRequestHeader("X-Requested-With","XM

var xhr = new XMLHttpRequest();xhr.open("get",remoteUrl);xhr.setRequestHeader("X-Requested-With","XMLHttpRequest");xhr.onload = function(){};xhr.send();

public static boolean isAjax(HttpServletRequest request) {   return request.getHeader("x-requested-with") != null &&           request.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest");}