[logback-user] Project Can't Find logback.xml file

Roger Spears rspears at northweststate.edu
Fri Jan 20 18:42:59 CET 2012


Thank you for your suggestion of add the ClassLoader.  I don't know why 
I didn't think of that.  Maybe it's because I'm fairly new to Java.

I added the following two lines to my HelloWorld.java class:

     String URL = "logback.xml";

The output I receive on the console looks like this:

12:30:01.762 [main] DEBUG helloworld - Hello world.

When I open the logback.xml file that is listed in the console output, 
it looks exactly like the custom logback.xml file I created.

The problem still exists that it's not picking up on the custom pattern 
I have in logback.xml.  That pattern looks like this:

<pattern>%date %n [%thread] %level %logger{35} - %n %msg</pattern>

I would have expected to see the date followed by a jump down to a new 
line followed by [main] followed by a jump down to a new line and etc. 
etc etc.

Am I wrong to think logback uses %n as new line characters?

My experience has been with log4j and %n generates the newline in its 

Thanks again,

> Adam Gordon <mailto:adam.n.gordon at gmail.com>
> January 20, 2012 12:13 PM
> The XML file needs to be in your class path. The first thing I would 
> check is to see if you can load the file as a resource with 
> ClassLoader.getResourceAsStream(String) or similar. If this is able to 
> load the file, then it's on your class path and I'm not sure what the 
> problem is but it's something to eliminate as an issue first.
> In my maven project, I have it in src/main/resources and everything is 
> happy.
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> Roger Spears <mailto:rspears at northweststate.edu>
> January 20, 2012 12:07 PM
> Hello,
> I'm running Netbeans 7.0.1 on a Mac Book Pro with OS Lion.  I'm 
> currently using log4j without any problems.  I wanted to try out logback.
> Yesterday I downloaded logback and placed the 4 jar files in the 
> proper location.  I'm able to run the basic logback HelloWorld 
> example.  Here's the code for the HelloWorld example I'm working with:
> package helloworld;
> import org.slf4j.Logger;
> import org.slf4j.LoggerFactory;
> public class HelloWorld {
>   public static void main(String[] args) {
>     Logger logger = LoggerFactory.getLogger("helloworld");
>     logger.debug("Hello world.");
>   }
> }
> Here's my customized logback.xml file:
> <configuration>
> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
> <encoder>
> <pattern>%date %n [%thread] %level %logger{35} - %n %msg</pattern>
> </encoder>
> </appender>
> <root level="DEBUG">
> <appender-ref ref="STDOUT" />
> </root>
> </configuration>
> The problem is...Netbeans (or java) never picks up on my customized 
> logback.xml file.  I'm starting out easy by just changing the pattern 
> to see if I can get it to work.  When I run the project, I see the 
> following on the console:
> 11:56:33.569 [main] DEBUG helloworld - Hello world.
> That's not the pattern I specified in logback.xml.
> I'm assuming I just don't have it in the proper location.  I have a 
> copy of logback.xml in the following locations just to see if I had it 
> in the wrong place:
> NetBeansProjects -> HelloWorld -> src -> logback.xml
> NetBeansProjects -> HelloWorld -> logback.xml
> NetBeansProjects -> HelloWorld -> nbproject -> private -> logback.xml
> NetBeansProjects -> HelloWorld -> build -> classes -> logback.xml
> System -> Libraries -> Java -> Extensions -> logback.xml
> I am still unable to get the pattern I'm looking for.
> Does anyone know why this would be happening?
> Thanks,
> Roger
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