标签：logger 打印 appender maven file apache org 日志 log4j

1）控制台日志提示1

log4j:WARN No appenders could be found for logger (**** class name).

原因：

未引入log4j的依赖

解决方式：

在pom.xml中引入依赖

<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

2）控制台日志提示2

log4j:WARN Please initialize the log4j system properly.

原因：

未配置log4j.properties 文件 和 logging.properties

解决方式：

在resources目录下新增properties文件

logging.properties

#
# JBoss, Home of Professional Open Source.
# Copyright 2012 Red Hat, Inc., and individual contributors
# as indicated by the @author tags.
#
# 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.
#

# Additional logger names to configure (root logger is always configured)
loggers=org.xnio.listener,org.xnio.ssl,org.apache,io.undertow.util.TestHttpClient

# Root logger configuration
logger.level=${test.level:INFO}
logger.handlers=CONSOLE

# Console handler configuration
handler.CONSOLE=org.jboss.logmanager.handlers.ConsoleHandler
handler.CONSOLE.properties=autoFlush,target
handler.CONSOLE.target=SYSTEM_ERR
handler.CONSOLE.level=ALL
handler.CONSOLE.autoFlush=true
handler.CONSOLE.formatter=PATTERN

# The log format pattern
formatter.PATTERN=org.jboss.logmanager.formatters.PatternFormatter
formatter.PATTERN.properties=pattern
formatter.PATTERN.pattern=%d{HH:mm:ss,SSS} %-5p (%t) [%c] <%F:%L> %m%n

logger.org.xnio.listener.level=DEBUG

logger.org.xnio.ssl.level=DEBUG

logger.org.apache.level=info
logger.org.apache.useParentHandlers=false
logger.io.undertow.util.TestHttpClient.level=info

log4j.properties

# log4j.rootLogger=WARN, stdout, file
log4j.rootLogger=info,stdout,file
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%p][%C.%M()]: %m%n

# Output to the File
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.DatePattern='_'yyyy-MM-dd'.log'
log4j.appender.file.File=./log/medium_system_api.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%p][%C.%M()]: %m%n

 3）问题解决

标签：logger,打印,appender,maven,file,apache,org,日志,log4j
来源： https://blog.csdn.net/keeptrying_tan/article/details/121648110

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