Load log4j.properties with JAR [duplicate]

Answer 1

Properties file doesn' go in classpath, you must provide it and call it from code as shown here.

EDIT: With your directory structure you call it like this:

PropertyConfigurator.configure("log4j.properties");

EDIT2:

Also, you must provide appender for it:

log4j.rootLogger=DEBUG, Appender1
log4j.logger.[logger-name]=level, Appender1
log4j.appender.Appender1=org.apache.log4j.ConsoleAppender
log4j.appender.Appender1.layout=org.apache.log4j.PatternLayout
log4j.appender.Appender1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

If you want finer control over logging, remove the first line (root looger) and put the second one where instead of [logger-name] you put the topmost package so that all the classes inside that package can use logging.

You can define multiple appenders and assign them to different classes in that manner.

Answer 2

You can also start your JVM with argument:

-Dlog4j.configuration=file:"./your/properties/path/log4j.properties"

to specify arbitrary location of your external log properties. I used this a lot in one particular project.

Answer 3

PropertyConfigurator.configure(ABC.class.getResourceAsStream("log4j.properties")) worked me correctly, but basically you need to place Log4j properties file in Source Code folder (next to Java Class).

OR you can try putting outside and give proper path in getResourceAsStream("resources/log4j.properties") method