log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).警告

Running the web project gives the following warning:

log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).

log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Reason: log4j was not found when loading spring's contextLoader.

solve:

There is no log4j configured in web.xml (add the following code in web.xml)

	<!-- log4g log configuration-->
	<context-param>
		<param-name>log4jConfigLocation</param-name>
		<param-value>classpath:log4j.properties</param-value>
	</context-param>
	<listener>
	<description>log4g log loading</description>
	<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
	</listener>

web.xml is configured, but the above warning still exists (that is, put the spring configuration contextConfigLocation after the log4j configuration)

	<!-- log4g log configuration-->
	<context-param>
		<param-name>log4jConfigLocation</param-name>
		<param-value>classpath:log4j.properties</param-value>
	</context-param>
	<listener>
		<description>log4g log loading</description>
		<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
	</listener>
	<!-- Load spring's xml configuration file into spring's context container -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:spring-*.xml</param-value>
	</context-param>

Attach log4j.properties

log4j.rootLogger=info,CONSOLE,A
log4j.addivity.org.apache = false

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=DEBUG
log4j.appender.CONSOLE.layout.ConversionPattern=%c %d{yyyy-MM-dd HH\:mm\:ss} -%-4r [%t] %-5p  %x - %m%n
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.Encoding=gbk
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout

log4j.appender.A = org.apache.log4j.DailyRollingFileAppender  
log4j.appender.A.File=${catalina.home}/logs/jeef_log/PurePro_
log4j.appender.A.DatePattern=yyyy-MM-dd'.log'
log4j.appender.A.layout=org.apache.log4j.PatternLayout  
log4j.appender.A.layout.ConversionPattern= %d{yyyy-MM-dd HH\:mm\:ss} %5p %c{1}\:%L \: %m%n

log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).警告

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