download link
https://files-cdn.cnblogs.com/files/Scorpicat/log4j-1.2.12.jar.zip
Import Profiles
Found in the eclipse directory:
Under log4j.properties file into the project src
log4j import project
Detailed configuration
Line 1: Global: INFO log level represents the lowest start as INFO, CONSOLE logging of execution to the console, if you want to output to a file, add: LOGFILE
Line 6: Customize a class trigger level
9-12: Output to the Console
Line 15-20: Export to profile
- Line 16: the file path and file name, you can make an absolute path
- Line 17: You can append
- Line 20: output format
use
Level (highest to lowest):
- FATAL
- ERROR
- WARN
- INFO
- DEBUG
In correspondence with the place:
- Usually FATAT and ERROR level used in the catch
- As necessary with other
class the Test {public
public static void main (String [] args) {
Logger Logger = LogManager.getLogger (Test.class);
logger.fatal ( "I'm a fatal error message");
logger.error ( "I was the error message" );
logger.warn ( "I am warning message");
logger.info ( "I'm info information");
logger.debug ( "I am the debug information");
}
}
Error:
I can not solve fault
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
Logger cannot be resolved to a type
Logger cannot be resolved
at com.xiaohei.test.Test.main(Test.java:7)