https://blog.csdn.net/wangb_java/article/details/107418160
实现同域
@Bean
public CookieSerializer cookieSerializer() {
DefaultCookieSerializer serializer = new DefaultCookieSerializer();
serializer.setCookieName("JSESSIONID"); //1
serializer.setDomainName("xxx.com"); //2
serializer.setCookiePath("/"); //3
return serializer;
}