百度一晚上，都是说要设置

axios.defaults.withCredentials=true;

然后在controller 上加上

@CrossOrigin(origins = "http://localhost:9080", maxAge = 3600)

其实根本不好用，还少一个参数

allowCredentials = "true"

下面这样才行因为 allowCredentials 默认是 "false"

@CrossOrigin(origins = "http://localhost:9080", maxAge = 3600,allowCredentials = "true")