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Configuration Properties File for Apache Log4j 1.x
How to write a configuration properties file for Log4j 1.x? I just want to use the basic functionalities to specify the log file name and the log level.
✍: FYIcenter.com
Below is a simple configuration file, log4j.properties, that support the Log4j API:
# Copyright (c) FYIcenter.com log4j.rootLogger=DEBUG, MyConsole, MyFile log4j.appender.MyConsole=org.apache.log4j.ConsoleAppender log4j.appender.MyConsole.layout=org.apache.log4j.PatternLayout log4j.appender.MyConsole.layout.ConversionPattern=%-4r %-5p [%t] %37c %3x - %m%n log4j.appender.MyFile=org.apache.log4j.FileAppender log4j.appender.MyFile.File=log4j.log log4j.appender.MyFile.layout=org.apache.log4j.PatternLayout log4j.appender.MyFile.layout.ConversionPattern=%-5r %-5p [%t] %c{2} - %m%n
This sample configuration file log4j2.properties does the following:
Below is a simple Java program Log4jPropertiesConfig.java that uses the above Log4j configuration:
// Copyright (c) FYIcenter.com import org.apache.log4j.*; public class Log4jPropertiesConfig { private static final Logger logger = Logger.getLogger("Log4jPropertiesConfig"); public static void main(String[] args) { PropertyConfigurator.configure("log4j.properties"); logger.fatal("Hello - fatal"); logger.error("Hello - error"); logger.warn("Hello - warn"); logger.info("Hello - info"); logger.debug("Hello - debug"); logger.trace("Hello - trace"); } }
Compile and run it with log4j-1.2.17.jar:
fyicenter> java -version java version "1.7.0_45" fyicenter> javac -cp log4j-1.2.17.jar Log4jPropertiesConfig.java fyicenter> java -cp .;log4j-1.2.17.jar Log4jPropertiesConfig 0 FATAL [main] Log4jPropertiesConfig - Hello - fatal 2 ERROR [main] Log4jPropertiesConfig - Hello - error 2 WARN [main] Log4jPropertiesConfig - Hello - warn 2 INFO [main] Log4jPropertiesConfig - Hello - info 2 DEBUG [main] Log4jPropertiesConfig - Hello - debug fyicenter> type log4j.log 0 FATAL [main] Log4jPropertiesConfig - Hello - fatal 2 ERROR [main] Log4jPropertiesConfig - Hello - error 2 WARN [main] Log4jPropertiesConfig - Hello - warn 2 INFO [main] Log4jPropertiesConfig - Hello - info 2 DEBUG [main] Log4jPropertiesConfig - Hello - debug
Everything works as expected.
⇒ Run Trivial.java Example in log4j-1.2.17.zip
⇐ Compile and Run Program with Apache Log4j 1.x
2016-06-28, 3338👍, 0💬
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