log4j将包内的所有类日志指定文件输出

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package logTest;import org.apache.commons.logging.Log;   import org.apache.commons.logging.LogFactory; public class LogTest { public static final Log LOG =    LogFactory.getLog(LogTest.class);  public void test() { LOG.info("test1") ; LOG.debug("test1") ; }}

package logTest;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;public class LogTest2 { public static final Log LOG =   LogFactory.getLog(LogTest2.class);  public static void main(String[] args) { LOG.info("test2") ; LOG.debug("test2") ; new LogTest().test() ;}}

log4j.properties配置:

#   Licensed 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.LOG_DIR=F://LogTest/log4j.rootLogger=INFO,console#Consolelog4j.appender.console=org.apache.log4j.ConsoleAppender  log4j.appender.console.Target=System.out  log4j.appender.console.layout=org.apache.log4j.PatternLayout  log4j.appender.console.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} [%c-%L]-[%p] %m%n  #test package print outlog4j.logger.logTest=INFO,logT  log4j.appender.logT=org.apache.log4j.RollingFileAppender  log4j.appender.logT.MaxFileSize=10240KB  log4j.appender.logT.MaxBackupIndex=2  log4j.appender.logT.File=${LOG_DIR}/test.log  log4j.appender.logT.layout=org.apache.log4j.PatternLayout  log4j.appender.logT.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} [%c-%L]-[%p] %m%n

注意，这里一开始犯了一个错误,eclpise默认在src下面找log4j.properties文件，否则就提示: log4j:WARN No appenders could be found for logger

结果输出:

2016-11-06 22:45:30 [logTest.LogTest2-11]-[INFO] test2
2016-11-06 22:45:30 [logTest.LogTest-14]-[INFO] test1

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