项目中大家可能不是一个网段。除了给chrome添加--disable-web-security外，后端的相应头应该如下设置
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type
Access-Control-Allow-Methods:GET, POST, OPTIONS
Access-Control-Allow-Origin:*
Cache-Control:no-cache
Connection:keep-alive
Content-Type:application/json
Date:Sat, 10 Sep 2016 09:26:59 GMT
Server:nginx/1.8.0
Transfer-Encoding:chunked
Access-Control-Allow-Origin:*！！！！！！！！！！！必须加上
