Change location of log4j properties

Question

I want to put all my config files in a  config subfolder of my application directory  Log4j is expecting the log4j properties file in the root folder of my application  Is there a way to tell log4j where to look for the properties file

User · Answer

Refer to this example taken from -  http   www dzone com tutorials java log4j sample-log4j-properties-file-configuration-1 html  import org apache log4j Logger  import org apache log4j PropertyConfigurator   public class HelloWorld        static final Logger logger   Logger getLogger HelloWorld class       static final String path    src resources log4j properties        public static void main String   args             PropertyConfigurator configure path           logger debug  Sample debug message            logger info  Sample info message            logger warn  Sample warn message            logger error  Sample error message            logger fatal  Sample fatal message              To change the logger levels - Logger getRootLogger   setLevel Level INFO

User · Answer

You must use log4j configuration property like this   java -Dlog4j configuration file  path to log4j properties myApp   If the file is under the class-path  inside   src main resources  folder   you can omit the file    protocol   java -Dlog4j configuration path to log4j properties myApp

User · Answer

In Eclipse you can set a VM argument to   -Dlog4j configuration file      workspace loc  MyProject log4j-full-debug properties

User · Answer

Use the PropertyConfigurator  PropertyConfigurator configure configFileUrl

User · Answer

This is my class   Path is fine and properties is loaded   package com fiserv dl idp logging   import java io File  import java io FileInputStream  import java util MissingResourceException  import java util Properties   import org apache log4j Logger  import org apache log4j PropertyConfigurator   public class LoggingCapsule        private static Logger logger   Logger getLogger LoggingCapsule class        public static void info String message              try                String configDir   System getProperty  config path                if  configDir    null                    throw new MissingResourceException  System property  config path not set                                      Properties properties   new Properties                properties load new FileInputStream configDir   File separator    log4j      properties                 PropertyConfigurator configure properties             catch  Exception e                e printStackTrace                       logger info message             public static void error String message           System out println message

User · Answer

Yes  define log4j configuration property  java -Dlog4j configuration file  path to log4j properties myApp   Note  that property value must be a URL   For more read section  Default Initialization Procedure  in Log4j manual

User · Answer

You can use PropertyConfigurator to load your log4j properties wherever it is located in the disk   Example   Logger logger   Logger getLogger this getClass     String log4JPropertyFile    C  this is my config path log4j properties   Properties p   new Properties     try       p load new FileInputStream log4JPropertyFile        PropertyConfigurator configure p       logger info  Wow  I m configured       catch  IOException e          DAMN  I m not          If you have an XML Log4J configuration  use DOMConfigurator instead

[java] Change location of log4j.properties

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