问题

I have a java application which is using log4j configured as below.

log4j.properties

log4j.rootLogger=INFO, R
log4j.appender.R = org.apache.log4j.DailyRollingFileAppender
log4j.appender.R.File = /trace.log
log4j.appender.R.Append = true
log4j.appender.R.DatePattern = '.'yyyy-MM-dd
log4j.appender.R.layout = org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern = %d{HH:mm:ss} %c{1} [%p] %m%n

I would like to migrate to log4j2 with the same configuration as above. Haven't found anything related to log4j2 properties configuration file as this support recently included.

Please can anyone help me out how would be my log4j2.properties file with the same configuration above ?

回答1:

rootLogger.level = INFO
property.filename = trace.log
appenders = R, console

appender.console.type = Console
appender.console.name = STDOUT
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = %d %5p [%t] (%F:%L) - %m%n

appender.R.type = RollingFile
appender.R.name = File
appender.R.fileName = ${filename}
appender.R.filePattern = ${filename}.%d{yyyy-MM-dd}
appender.R.layout.type = PatternLayout
appender.R.layout.pattern = %d{yyyy-MM-dd HH:mm:ss} %c{1} [%p] %m%n
appender.R.policies.type = Policies
appender.R.policies.time.type = TimeBasedTriggeringPolicy
appender.R.policies.time.interval = 1

rootLogger.appenderRefs = R, console

rootLogger.appenderRef.console.ref = STDOUT
rootLogger.appenderRef.R.ref = File

回答2:

You can use this to convert from Log4J.properties (v1.2) to log4j2.xml as below:

1) Convert from v1.2 properties to v1.2XML using this converter: https://log4j-props2xml.appspot.com/

2) Convert from v1.2 XML to v2.0 XML (i.e. Log4j2.xml) using the procedure provided on this link: https://logging.apache.org/log4j/2.x/manual/migration.html

回答3:

Log4j2 supports .properties files but they have changed property syntax. You can check their manual here it covers all you need to create new configuration.

回答4:

You can use this wonderful frontend web to convert you properties to a XML http://log4j-props2xml.appspot.com/

Resulting:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
    <appender name="R" class="org.apache.log4j.DailyRollingFileAppender">
        <param name="Append" value="true"/>
        <param name="DatePattern" value="'.'yyyy-MM-dd"/>
        <param name="File" value="/trace.log"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d{HH:mm:ss} %c{1} [%p] %m%n"/>
        </layout>
    </appender>
    <root>
        <level value="INFO"/>
        <appender-ref ref="R"/>
    </root>
</log4j:configuration>

来源：https://stackoverflow.com/questions/35900555/migrating-from-log4j-to-log4j2-properties-file-configuration

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