高山仰止，景行行止

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...

启动时程序报日志的警告：找到原因：GBK后面有一个空格！删除就好了，不报错了！相关连接：https://blog.youkuaiyun.com/hblfyla/article/details/74384915

这两个错误师出同门，都是端口被占用java.net.SocketException: errno:13) at sun.nio.ch.Net.bind(Native Method) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119) at sun....