<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration PUBLIC "-//log4j/log4j Configuration//EN" "log4j.dtd">
 
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
     
    <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
       <layout class="org.apache.log4j.PatternLayout"> 
          <param name="ConversionPattern" value="%d %-5p %c.%M:%L - %m%n"/> 
       </layout> 
    </appender>
  
    <!-- specify the logging level for loggers from other libraries -->
    <logger name="com.opensymphony">
        <level value="ERROR" />
    </logger>
 
    <logger name="org.apache">
         <level value="ERROR" />
    </logger>
    <logger name="org.hibernate">
         <level value="ERROR" />
    </logger>
   
   <!-- for all other loggers log only debug and above log messages -->
     <root>
        <priority value="ERROR"/> 
        <appender-ref ref="STDOUT" /> 
     </root> 
     
</log4j:configuration> 

package log4j;

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;

public class TestLog4j {
	static Logger logger = Logger.getLogger(TestLog4j.class);
	public static void main(String[] args) throws InterruptedException {
		PropertyConfigurator.configure("e:\\project\\log4j\\src\\log4j.xml");
		for (int i = 0; i < 5000; i++) {
			logger.trace("跟踪信息");
			logger.debug("调试信息");
			logger.info("输出信息");
			logger.warn("警告信息");
			logger.error("错误信息");
			logger.fatal("致命信息");
		}
	}
}