log4j的升级版--log4j2
由一个错误而引发的问题，错误如下：log4j:WARN No appenders could be found for logger (org.springframework.web.context.support.Standardlog4j:WARN Please initialize the log4j system properly.但是我并没有做改动，为啥忽然就罢工了呢，于是在网上...
