tomcat 6.x + log4j日志配置并按天（或大小）生成文件

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tomcat日志，默认路径在${catalina.home}/logs目录下，默认使用的是tomcat自己封装的logging工具类，默认配置文件使用的${catalina.home}/conf/logging.properties

默认的配置不满足按天或按大小将日志区分，用以备份或转移或删除，经常会出现日志文件超大，磁盘空间不够的情况（就算磁盘够，一段时间后的日志也应该及时清理和压缩起来）。

考虑到这种需求，使用log4j的配置，将tomcat的logging拦截起来，配置如下：

采用log4j配置，适用版本为：6.x（4.x或7.x的差别还是有的不过不大），有配置属性的改动，步骤如下：
1. 修改${catalina.home}/conf/context.xml
修改：<Context >为<Context swallowOutput="true" >
2. 拷贝log4j.jar到${catalina.home}/lib下
3. 拷贝tomcat-juli-adapters.jar到${catalina.home}/lib下
4. 拷贝tomcat-juli.jar到${catalina.home}/bin下，在该目录会存在该文件，覆盖即可
5. 拷贝log4j.properties到${catalina.home}/lib下，配置如下：

log4j.rootLogger=INFO,CATALINA

log4j.logger.org.apache.catalina=WARN,CONSOLE

#log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost]=INFO

log4j.logger.org.apache.catalina.core=WARN,CATALINA

log4j.logger.org.apache.catalina.session=WARN,CATALINA

#log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender

# Define all the appenders

log4j.appender.CONSOLE=org.apache.log4j.DailyRollingFileAppender

log4j.appender.CONSOLE.File=${catalina.home}/logs/catalina.out

log4j.appender.CONSOLE.Append=true

log4j.appender.CONSOLE.Encoding=UTF-8

# Roll-over the log once per day

log4j.appender.CONSOLE.DatePattern='.'yyyy-MM-dd'.log'

log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout

log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p %c- %m%n

# Define all the appenders

log4j.appender.CATALINA=org.apache.log4j.DailyRollingFileAppender

log4j.appender.CATALINA.File=${catalina.home}/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{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5p %c- %m%n

log4j.appender.LOCALHOST=org.apache.log4j.DailyRollingFileAppender

log4j.appender.LOCALHOST.File=${catalina.home}/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{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5p %c- %m%n

log4j.appender.MANAGER=org.apache.log4j.DailyRollingFileAppender

log4j.appender.MANAGER.File=${catalina.home}/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{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5p %c- %m%n

log4j.appender.HOST-MANAGER=org.apache.log4j.DailyRollingFileAppender

log4j.appender.HOST-MANAGER.File=${catalina.home}/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{yyyy-MM-dd HH:mm:ss.SSS} [%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