java - Tomcat System.out 重定向

Question

我们有一个在 Tomcat 上运行的遗留 Java 应用程序。它以有些不一致的方式记录其事件，有时甚至依赖于 System.out/err。这些 stdout/stderr 记录最终出现在 catalina.log 中，在那里它们与“正确记录的”事件混合在一起。我们想将 stdout/stderr 日志流分离到单独的文件中(并最终摆脱它们)，但我们不知道该怎么做。服务器运行默认的 JULI 配置，但我们对任何其他选项(例如 SLF4J + Logback)持开放态度。

Answer 1

完整解释:Log4J只需将 log4j.jar 和 log4j.properties 放入 Web 应用程序的 WEB-INF/lib 和 WEB-INF/classes 中。使用以下内容创建一个名为 log4j.properties 的文件并将其保存到 $CATALINA_BASE/lib

将停止输出到标准输出的 log4j.properties 示例:

log4j.rootLogger=INFO, yourapp

#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

#You can define your Applog here: 

log4j.appender.yourapp=org.apache.log4j.RollingFileAppender
log4j.appender.yourapp.File=${catalina.base}/logs/yourapp.log
log4j.appender.yourapp.MaxFileSize=100MB
log4j.appender.yourapp.MaxBackupIndex=10
log4j.appender.yourapp.layout=org.apache.log4j.PatternLayout
log4j.appender.yourapp.layout.ConversionPattern=%d %p [%c] (%t) - <%m>%n

希望对您有所帮助!