log4j:WARN No appenders could be found for logger (org.springframework.web.context.support.StandardServletEnvironment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log. for more info.
the one who reported an error is a warning. First, I would like to ask how to solve this problem. Second, if I want to have this kind of problem and report an error, how to search for Baidu? who will tell me that the newcomer will not check for errors?