springboot解决ajax跨域访问，session丢失的问题

1、前端ajax

	$.ajax({
		url: url,
		type: 'post',
	    xhrFields: {withCredentials:true},	//前端适配：允许session跨域
	    crossDomain: true,
		data: data,
		success: function(data) {
		}
	});

ajax加上这两句

	xhrFields: {withCredentials:true},	//前端适配：允许session跨域
    crossDomain: true,

2、后台

@CrossOrigin(allowCredentials="true",allowedHeaders="*")