log4j:WARN No appenders could be found for logger (freemarker.cache)

The freemarker dependency package is introduced into the project. However, the red warning caused by the corresponding log level is not configured in the log4j.properties file. as follows:

< dependency >
   < groupId > org.springframework.boot </ groupId >
   < artifactId > spring-boot-starter-freemarker </ artifactId >
</ dependency >
log4j :WARN No appenders could be found for logger (freemarker.cache).
log4j :WARN Please initialize the log4j system properly.
log4j : WARN See HTTP : //logging.apache.org/log4j/1.2/faq.html#noconfig for More info.


Solution: log4j.properties plus the corresponding configuration

log4j.logger.freemarker.cache =ERROR
log4j.logger.freemarker.beans =ERROR

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