tomcat 7更換log4j管理日誌(官網文檔)

The following steps describe configuring log4j to output Tomcat's internal logging.

1. Create a file called log4j.properties with the following content and save it into $CATALINA_BASE/lib

log4j.rootLogger = INFO, CATALINA

# Define all the appenders
log4j.appender.CATALINA = org.apache.log4j.DailyRollingFileAppender
log4j.appender.CATALINA.File = ${catalina.base}/logs/catalina
log4j.appender.CATALINA.Append = true
log4j.appender.CATALINA.Encoding = UTF-8
# Roll-over the log once per day
log4j.appender.CATALINA.DatePattern = '.'yyyy-MM-dd'.log'
log4j.appender.CATALINA.layout = org.apache.log4j.PatternLayout
log4j.appender.CATALINA.layout.ConversionPattern = %d [%t] %-5p %c- %m%n

log4j.appender.LOCALHOST = org.apache.log4j.DailyRollingFileAppender
log4j.appender.LOCALHOST.File = ${catalina.base}/logs/localhost
log4j.appender.LOCALHOST.Append = true
log4j.appender.LOCALHOST.Encoding = UTF-8
log4j.appender.LOCALHOST.DatePattern = '.'yyyy-MM-dd'.log'
log4j.appender.LOCALHOST.layout = org.apache.log4j.PatternLayout
log4j.appender.LOCALHOST.layout.ConversionPattern = %d [%t] %-5p %c- %m%n

log4j.appender.MANAGER = org.apache.log4j.DailyRollingFileAppender
log4j.appender.MANAGER.File = ${catalina.base}/logs/manager
log4j.appender.MANAGER.Append = true
log4j.appender.MANAGER.Encoding = UTF-8
log4j.appender.MANAGER.DatePattern = '.'yyyy-MM-dd'.log'
log4j.appender.MANAGER.layout = org.apache.log4j.PatternLayout
log4j.appender.MANAGER.layout.ConversionPattern = %d [%t] %-5p %c- %m%n

log4j.appender.HOST-MANAGER = org.apache.log4j.DailyRollingFileAppender
log4j.appender.HOST-MANAGER.File = ${catalina.base}/logs/host-manager
log4j.appender.HOST-MANAGER.Append = true
log4j.appender.HOST-MANAGER.Encoding = UTF-8
log4j.appender.HOST-MANAGER.DatePattern = '.'yyyy-MM-dd'.log'
log4j.appender.HOST-MANAGER.layout = org.apache.log4j.PatternLayout
log4j.appender.HOST-MANAGER.layout.ConversionPattern = %d [%t] %-5p %c- %m%n

log4j.appender.CONSOLE = org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Encoding = UTF-8
log4j.appender.CONSOLE.layout = org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern = %d [%t] %-5p %c- %m%n

# Configure which loggers log to which appenders
log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost] = INFO, LOCALHOST
log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager] =\
  INFO, MANAGER
log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager] =\
  INFO, HOST-MANAGER

2. Download Log4J (Tomcat requires v1.2.x).

3. Download or build tomcat-juli.jar and tomcat-juli-adapters.jar that are available as an "extras" component for Tomcat. See Additional Components documentation for details.

   This tomcat-juli.jar differs from the default one. It contains the full Apache Commons Logging implementation and thus is able to discover the presence of log4j and configure itself.

4. If you want to configure Tomcat to use log4j globally:

   • Put log4j.jar and tomcat-juli-adapters.jar from "extras" into $CATALINA_HOME/lib.
   • Replace $CATALINA_HOME/bin/tomcat-juli.jar with tomcat-juli.jar from "extras".

5. If you are running Tomcat with separate $CATALINA_HOME and $CATALINA_BASE and want to configure to use log4j in a single $CATALINA_BASE only:

   • Create $CATALINA_BASE/bin and $CATALINA_BASE/lib directories if they do not exist.
   • Put log4j.jar and tomcat-juli-adapters.jar from "extras" into $CATALINA_BASE/lib
   • Put tomcat-juli.jar from "extras" as $CATALINA_BASE/bin/tomcat-juli.jar
   • If you are running with a security manager, you would need to edit the $CATALINA_BASE/conf/catalina.policy file to adjust it to using a different copy of tomcat-juli.jar.

6. Delete $CATALINA_BASE/conf/logging.properties to prevent java.util.logging generating zero length log files.

7. Start Tomcat

注：
1、查找發現網絡說需要配置：修改tomcat/conf/目錄下context.xml  將<Context>改爲<Context swallowOutput="true">
但是測試發現並沒有什麼特別效果；

2、按照官網方式配置 如果日誌文件配置與tomcat默認生成的catalina.out文件一直 會出現不能夠按日誌自動拆分文件的情況；

3、替換tomcat log4j日誌配置會出現部分日誌信息仍然會打印到原catalina.out文件中的情況，暫未找到具體原因，需要特別注意；