log4j2 xml configuration - Log to file and console (with different levels)

Question

I want to do two things:

1. Log to console with a certain log-level
2. Log to file with another log-level

Console logging seems to work just

Answer 1

Summary others (@basiljames, @daker, @Jay Taylor) answers here:

my log4j2.xml Configuration

my case:

• log4j2 version: 2.13.0

• log4j2.xml configuration:

  
    
      
        %d{yyyyMMdd HH:mm:ss} %-5p [%t] %C{2} %F%L - %m%n
      
    

    
      
    
  

  
    
      
      
    
  

Q: how to implement File and Console with different level ?

A: as official doc also mentioned, the core part:

can achieve:

based on:

• root level is DEBUG

set:

• File level to DEBUG
• Console level to INFO

Q: @Stealth Rabbi： so what was the problem?

A: original main problem is:

the logger name syntax is wrong

that is name="filelogger" in:

for normally the logger name is your class name, like

another possible minor problem is:

log content level is below your file level error, so file created but empty

when set file level to error, but your log code is low level, such as

logger.debug("output something");

that is:

logger lever in code(debug) < file level(error)

so debug content will NOT output to log file, log file keep empty.

Q: @Bendemann is it possible to specify a path where I want to save the file if I am running a war file on a tomcat server?

A: yes. Just set the relative or absolute log file path to File's fileName.

just like:

  
    
...

is ok.