即将跳转到外部网站,安全性未知,是否继续?
https://github.com/spring-projects/spring-framework/blob/d5df097e0e3afe7ae36622ad275b39631ee38c3b/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupport.java#L871-L874