springboot log4j:WARN No appenders could be found for logger

这里写自定义目录标题

• 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/log4j/1.2/faq.html#noconfig for more info.

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/log4j/1.2/faq.html#noconfig for more info.

今天启动我一个springboot项目突然报了一个这样的错误，之前我是能跑起来的。中途我确实是改了些东西！挺奇怪的，之前没有注意到，可能是看到了但是项目能跑起来就没有管，我的锅！！！

它这里说的意思是log4j没有初始化日志，解决的办法就是再resource资源文件夹下加上log4j.properties

### 输出信息到控制抬 ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n

接下启动项目，大功告成。