All Messages of Referenced Jar to Log File + Setting up Encoding of Log File to UTF-8 to display Japanese Characters (Log4j2)

I have 2 questions regarding Log4j2.

1. How can I set that warnings and errors of referenced Jar files to output in the log file instead of the console? Currently, log statements in my application are being printed in the log file. But those messages from the referenced Jar files are being printed in the console instead.

2. How can I set Japanese characters to be printed in the generated logfile? Currently, I have set charset of layout but the output of Japanese characters are still in "?" or garbage characters.

This is my current property file:

<pre>
<code>

status = error
name = PropertiesConfig

property.filename = ${sys:user.home}\\myApp\\logs\\application.log
 
filters = threshold
 
filter.threshold.type = ThresholdFilter
filter.threshold.level = debug
#filter.threshold.level = info
 
appenders = rolling
 
appender.rolling.type = RollingFile
appender.rolling.name = RollingFile
appender.rolling.fileName = ${filename}
appender.rolling.filePattern = ${sys:user.home}\\myApp\\logs\\log-backup-%d{MM-dd-yy-HH-mm-ss}-%i.log.zip
appender.rolling.layout.type = PatternLayout
appender.rolling.layout.pattern = %d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
appender.rolling.layout.charset = "UTF-8"
appender.rolling.policies.type = Policies
appender.rolling.policies.size.type = SizeBasedTriggeringPolicy
appender.rolling.policies.size.size=1MB
appender.rolling.strategy.type = DefaultRolloverStrategy
appender.rolling.strategy.max = 20
 
loggers = rolling
 
logger.rolling.name = org.mycom.myproj.tools.myapp
logger.rolling.level = all
logger.rolling.additivity = false
logger.rolling.appenderRef.rolling.ref = RollingFile

rootLogger.level = all
rootLogger.appenderRefs = rolling
rootLogger.appenderRef.rolling.ref = RollingFile

</code>
</pre>

I assume you mean 'external third party libraries' by 'referenced jar files'. Libraries usually use a logger abstraction like apache.commons.logging or slfj4 for issuing its log outputs.

You need to add an additional dependency which bridges these log outputs correctly to your log4j2-Logger. e.g. "org.apache.logging.log4j:log4j-slf4j-impl:2.7".

If you do not provide such a bridge the log abstraction framework might do default initialization (which probably logs to console).