Jquery Ajax设置withCredentials解决跨域请求

后端代码： 

        httpResponse.setHeader("Access-Control-Allow-Origin", httpServletRequest.getHeader("Origin"));
        httpResponse.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        httpResponse.setHeader("Access-Control-Allow-Credentials", "true");

前端代码： 

 $.ajax({
            url: "http://localhost:8080/orders",
            type: "GET",
            xhrFields: {
                withCredentials: true
            },
            crossDomain: true,
            success: function (data) {
                render(data);
            }
 });

跨域请求想要带上cookies必须在请求头里面加上{crossDomain: true, xhrFields: {withCredentials: true}}设置。