java出現以下警告：WARN No appenders;WARN Please initialize the log4j的處理方法

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編譯java或引用別的代碼時出現以下警告：

log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper).log4j:WARN Please initialize the log4j system properly.log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

出現這個的原因是沒有初始化log4j配置導致的

這個是個警告如果不上心可以不管，如果想去掉或者把日誌記錄下來，就要在程式中處理一下。

1.在src同級目錄下建立檔案夾config，config內建立檔案log4j.properties，檔案內容如下，每個配置的詳細說明請見：http://www.cnblogs.com/likui360/p/7992982.html  可以根據自己的需求進行調整。

 

log4j.rootCategory=INFO, stdout , R      log4j.appender.stdout=org.apache.log4j.ConsoleAppender   log4j.appender.stdout.layout=org.apache.log4j.PatternLayout   log4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n       log4j.appender.R=org.apache.log4j.DailyRollingFileAppender   log4j.appender.R.File=D:\\Tomcat 5.5\\logs\\qc.log   log4j.appender.R.layout=org.apache.log4j.PatternLayout   1log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n      log4j.logger.com.neusoft=DEBUG   log4j.logger.com.opensymphony.oscache=ERROR   log4j.logger.net.sf.navigator=ERROR   log4j.logger.org.apache.commons=ERROR   log4j.logger.org.apache.struts=WARN   log4j.logger.org.displaytag=ERROR   log4j.logger.org.springframework=DEBUG   log4j.logger.com.ibatis.db=WARN   log4j.logger.org.apache.velocity=FATAL      log4j.logger.com.canoo.webtest=WARN      log4j.logger.org.hibernate.ps.PreparedStatementCache=WARN   log4j.logger.org.hibernate=DEBUG   log4j.logger.org.logicalcobwebs=WARN  log4j.rootCategory=INFO, stdout , Rlog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n log4j.appender.R=org.apache.log4j.DailyRollingFileAppenderlog4j.appender.R.File=D:\\Tomcat 5.5\\logs\\qc.loglog4j.appender.R.layout=org.apache.log4j.PatternLayout1log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%nlog4j.logger.com.neusoft=DEBUGlog4j.logger.com.opensymphony.oscache=ERRORlog4j.logger.net.sf.navigator=ERRORlog4j.logger.org.apache.commons=ERRORlog4j.logger.org.apache.struts=WARNlog4j.logger.org.displaytag=ERRORlog4j.logger.org.springframework=DEBUGlog4j.logger.com.ibatis.db=WARNlog4j.logger.org.apache.velocity=FATALlog4j.logger.com.canoo.webtest=WARNlog4j.logger.org.hibernate.ps.PreparedStatementCache=WARNlog4j.logger.org.hibernate=DEBUGlog4j.logger.org.logicalcobwebs=WARN 

 

2.在程式中匯入：

import org.apache.log4j.Logger;import org.apache.log4j.Priority;import org.apache.log4j.PropertyConfigurator;

3.程式第一行加入初始化語句：

PropertyConfigurator.configure("config/log4j.properties");

重新編譯，輸出的內容中不再有警告資訊，如果想看到就直接把log4j.rootCategory設定成OFF。

 

log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper).log4j:WARN Please initialize the log4j system properly.log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

java出現以下警告：WARN No appenders;WARN Please initialize the log4j的處理方法