log4j 简单使用

使用Log4j 感觉好像就是学怎么写它的配置文件 呵呵！！

 

log4j.properties

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


# For the general syntax of property based configuration files see the
# documenation of org.apache.log4j.PropertyConfigurator.

# The root category uses the appender called A1. Since no priority is
# specified, the root category assumes the default priority for root
# which is DEBUG in log4j. The root category is the only category that
# has a default priority. All other categories need not be assigned a
# priority in which case they inherit their priority from the
# hierarchy.

# 	配置输出swing
#	log4j.rootCategory=, A1

# 	A1 is set to be a LF5Appender which outputs to a swing
# 	logging console. 
  
#	log4j.appender.A1=org.apache.log4j.lf5.LF5Appender
#	log4j.appender.A1.MaxNumberOfRecords=1000


#  下面是在控制台输出

# Configure logging for testing: optionally with log file
log4j.rootLogger= ,stdout,warn,error,fatal
# log4j.rootLogger=WARN, stdout, logfile

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n

#  文件输出 

log4j.appender.warn.Threshold=WARN
log4j.appender.warn=org.apache.log4j.FileAppender
log4j.appender.warn.File=test/first/warn.log
log4j.appender.warn.append=true
log4j.appender.warn.layout=org.apache.log4j.PatternLayout
log4j.appender.warn.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n

log4j.appender.error.Threshold=ERROR 
log4j.appender.error=org.apache.log4j.FileAppender
log4j.appender.error.File=test/first/error.log
log4j.appender.error.append=true
log4j.appender.error.layout=org.apache.log4j.PatternLayout
log4j.appender.error.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n

log4j.appender.fatal.Threshold=FATAL 
log4j.appender.fatal=org.apache.log4j.FileAppender
log4j.appender.fatal.File=test/first/fatal.log
log4j.appender.fatal.append=true
log4j.appender.fatal.layout=org.apache.log4j.PatternLayout
log4j.appender.fatal.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n

 

 

 

MyLogger.java

package test.first;

import org.apache.log4j.*;

class MyLogger{
	
	static String FQCN = MyLogger.class.getName() + ".";
	
	private Logger common_log = Logger.getLogger("stdout");
	private Logger warn_log = Logger.getLogger("warn");
	private Logger error_log = Logger.getLogger("error");
	private Logger fatal_log = Logger.getLogger("fatal");
	
	public void debug(Object message) {
		common_log.debug(message);
	}


	public void error(Object message) {
		error_log.error(message);
	}


	public void fatal(Object message) {
		fatal_log.fatal("fatal");
	}


	public void info(Object message) {
		common_log.info(message);
	}


	public void warn(Object message) {
		warn_log.warn(message);
	}
}

 

 

 

Test.java

package test.first;


public class Test{
	public static void main(String[] args) {
		MyLogger log = new MyLogger();
		log.debug("debug");
		log.info("info");
		log.warn("warn");
		log.error("error");
		log.fatal("fatal");
	}
}