We can also use an xml file named log4j.xml to configure the Log4j. Let us discuss the use of log4j.xml configuration file with the help of below example.
Example:
Log4jTest.java
import org.apache.log4j.Logger;
/**
* This class is used to show the use of
* Log4j with the log4j.xml file.
* @author javawithease
*/
public class Log4jTest {
//Get the Logger object.
private static Logger log = Logger.getLogger(Log4jTest.class);
public static void main(String[] args) {
//logger messages
log.debug("Log4j debug message test.");
log.info("Log4j info message test.");
log.warn("Log4j warn message test.");
log.error("Log4j error message test.");
log.fatal("Log4j fatal message test.");
}
} |
log4j.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
<appender name="CA" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%m%n" />
</layout>
</appender>
<root>
<level value="info" />
<appender-ref ref="CA" />
</root>
</log4j:configuration> |
Output:
Log4j info message test.
Log4j warn message test.
Log4j error message test.
Log4j fatal message test. |
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