无法在Log4j中设置日志记录级别和输出

Question

I am unable to set Root Logger Option through properties file in Log4j. Below is how my properties file looks -

I have saved this file as log4j2.properties in the root of src folder.

# Root logger option
log4j.rootLogger=INFO, stdout

# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

I tried setting the rootLogger to ALL but, it doesn't work. However; if I set the Level to ALL through the method in my program it works. Example -

package com.nanwani;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

public class LoggerTest {

    public static Logger log = Logger.getLogger(LoggerTest.class);

    public static void main(String[] args) {

        log.setLevel(Level.ALL);

    }

}

In addition, it seems it is not referring to my properties file at all however, if I delete this file then it does show ERROR message that - using default properties file as log4j2 file not found.

Answer 1

I have found the answer to my question. Log4j2 does not support configuration properties file as opposed to Log4j v1. New formats are XML, JSON, and YAML, see the documentation

Answer 2

The file log4j2.properties must be named log4j.properties (if you are using Log4j version 1) . And you have to log something using log.debug("message"). What about considering moving the file to the src/main/resources folder?