Why the output is not TRACE and is DEBUG one in the console there.

Properties file setting:
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{ABSOLUTE} %5p %c{1}:%L - %m%n

That is the codding
log.trace("Change table data.");

Console output:
17:57:34,843 DEBUG MainPage:200 - Change table data.