log4j configuration file and jar application

Question

I'm using the log4j2 library to manage the logging process. I created a configuration file named log4j2.xml containing the Appenders and Loggers configurations. Then, I defined a Logger in each class

private static Logger my_logger = LogManager.getLogger(my_class);

I did not specify anywhere the name of the conf file, so I think that the library implicitly get and read it.

Now, I need to provide my application in the form of a jar file, so I need to make the config file available so that the user can modify and configure it.

In my case, I suggest to create a XXX folder at the level of the jar file, containing all the configuration files used by my app.

My question is how can I say to the app "get XXX/log4j2.xml" rather than the xml contained into the jar.

Answer 1

该配置文件必须位于类路径中，如果您希望应用从其他任何位置读取配置，则需要使用

PropertyConfigurator.configure("/myPath/log4j.properties");

Answer 2

Make any folder and put your property or xml file in that. In order to read the property file you can do something like this:

Properties objProperties = new Properties();   
 <your-class>.class.getClassLoader().getResource("folder/log4j.properties");
objProperties.load(isFile);

or, Also this:

InputStream ist = Thread.currentThread().getContextClassLoader().getResourceAsStream("folder/log4j.properties");

In case of java web application please use the link

Answer 3

I had a similar task a few weeks ago. I solved it this way:

• Store a template of your log4j2.xml inside your jar files resource folder

• When running your application, check for a file named log4j2.xml in the jar files current directory

• If there is one, use that to create your logger

• If not, copy your template from within your jar to the jar files directory and then use that to create your logger.

Cheers