如何使log4j记录到一个文件并打印到控制台

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问题描述

我可以使日志进入控制台，但我似乎无法将其转到日志文件.这是我的properties文件.

log4j.rootLogger=DEBUG, LOG , stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p %d{d/MM/yy HH:mm:ss}:%m%n
# log4j.appender.LOG.Threshold=INFO

log4j.appender.LOG=org.apache.log4j.RollingFileAppender
log4j.appender.LOG.File=C:\dev\harry\data\logs\core.log
log4j.appender.LOG.layout=org.apache.log4j.PatternLayout
log4j.appender.LOG.Append=true
log4j.appender.LOG.layout.ConversionPattern=%5p %d{d/MM/yy HH:mm:ss}:%m%n
# log4j.appender.LOG.Threshold=INFO

其他推荐答案

文件路径中的\存在一些问题.该语法有点隐秘，但是登录到多个位置的方法是将命名的日志记录Appender附加到根记录器上.在此示例中，这是:

log4j.rootLogger=DEBUG, LOG , stdout

DEBUG是用于根记录器的记录级别(阈值过滤器).

LOG是记录appender的名称

stdout是第二个appender的名称

记录附录由

指定

log4j.appender.{logging-appender-name}={some.log4j.appender.class}
log4j.appender.{logging-appender-name}.{some-other-property}=...

其中{logging-appender-name}是您自己选择的名称(在这种情况下为log and stdout)和{some.log4j.appender.class}是许多log4j 记录appender class 例如 dailyrollling fileappender 或 consoleappender .

其他推荐答案

我会添加: log4j.appender.log.threshold = all

我不确定默认值是什么.

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问题描述

I can make the log to go the console but I cant seem to make it go to a log file. Here is my properties file.

log4j.rootLogger=DEBUG, LOG , stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p %d{d/MM/yy HH:mm:ss}:%m%n
# log4j.appender.LOG.Threshold=INFO

log4j.appender.LOG=org.apache.log4j.RollingFileAppender
log4j.appender.LOG.File=C:\dev\harry\data\logs\core.log
log4j.appender.LOG.layout=org.apache.log4j.PatternLayout
log4j.appender.LOG.Append=true
log4j.appender.LOG.layout.ConversionPattern=%5p %d{d/MM/yy HH:mm:ss}:%m%n
# log4j.appender.LOG.Threshold=INFO

其他推荐答案

There are some issues with the \ in the file path that need to be fixed. The syntax is a bit cryptic but the way to log to multiple locations is to attach a named logging appender to the root logger. In this example this is:

log4j.rootLogger=DEBUG, LOG , stdout

DEBUG is a logging level (threshold filter) to use for the root logger.

LOG is the name of a logging appender

stdout is the name of a second appender

The logging appenders are specified by

log4j.appender.{logging-appender-name}={some.log4j.appender.class}
log4j.appender.{logging-appender-name}.{some-other-property}=...

Where {logging-appender-name} is a name selected by yourself (in this case LOG and stdout) and {some.log4j.appender.class} is one of the many log4j logging appender classes such as DailyRollingFileAppender or ConsoleAppender.

其他推荐答案

I would have added: log4j.appender.LOG.Threshold=ALL

I'm not sure what the default is.

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