Log4j的错误处理

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在启动tomcat时候报：

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

log4j:WARN Please initialize the log4j system properly.

我的log4j.properties在类路径下，配置如下：

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=%d [%t] %-5p [%c] - %m%n

log4j.appender.R=org.apache.log4j.DailyRollingFileAppender
log4j.appender.R.File=./logs/app.log
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n

#struts
log4j.logger.com.opensymphony.xwork2=INFO

log4j.logger.org.apache.struts2=DEBUG

#spring
log4j.logger.org.springframework=INFO

#mybatis
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

log4j.rootLogger=warn, stdout, R

log4j.logger.cn.xyz=DEBUG

解决办法是在web.xml文件加上：

    org.springframework.web.util.Log4jConfigListener
 

    log4jConfigLocation
    classpath:nsfw/log4j.properties
 

但是有一点必须注意，就是log4jConfigLocation监听器要放在spring初始化监听器的前面。这点应该很好理解...

转载于:https://my.oschina.net/u/2559261/blog/657115