https://github.com/spring-projects/spring-framework/blob/11f6c4e7ab6b63f363aca63230aef111f476484e/spring-beans/src/main/java/org/springframework/beans/factory/xml/BeanDefinitionParserDelegate.java#L420

StringUtils.tokenizeToStringArray() Methods internal maintenance a List,but new List again where this method is called.Would you like Optimize the code？