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;
	}