我要评论springboot logback-spring.xml无法加载
现象
springboot项目，启动后，日志文件没有出现在logback-spring.xml指定的目录下
且启动日志开头如下：
"c:\program files\java\jdk1.8.0_144\bin\java"...
connected to the target vm, address: '127.0.0.1:52494', transport: 'socket'
18:34:58,011 |-info in ch.qos.logback.classic.loggercontext[default] - could not find resource [logback-test.xml]
18:34:58,011 |-info in ch.qos.logback.classic.loggercontext[default] - could not find resource [logback.groovy]
18:34:58,011 |-info in ch.qos.logback.classic.loggercontext[default] - found resource [logback.xml] at [jar:file:/d:/mvn_repo/xxx-1.0.2.jar!/logback.xml]
18:34:58,014 |-info in ch.qos.logback.core.joran.spi.configurationwatchlist@707194ba - url [jar:file:/d:/mvn_repo/yyy-1.0.2.jar!/logback.xml] is not of type file
18:34:58,112 |-info in ch.qos.logback.classic.joran.action.configurationaction - will scan for changes in [jar:file:/d:/mvn_repo/zzz-1.0.2.jar!/logback.xml]
logback-spring.xml文件一直未改动过，如下：
<?xml version="1.0" encoding="utf-8"?>
<configuration status="info">
<springproperty scope="context" name="logpath" source="log.path"/>
<springproperty scope="context" name="loglevel" source="log.level"/>
<appender name="consolelog" class="ch.qos.logback.core.consoleappender">
<layout class="ch.qos.logback.classic.patternlayout">
<pattern> %d{yyyy-mm-dd hh:mm:ss.sss} %-5level [%thread] %logger{36} %line - %msg%n</pattern>
</layout>
</appender>
<appender name="filelog" class="ch.qos.logback.core.rolling.rollingfileappender">
<!--滚动策略-->
<rollingpolicy class="ch.qos.logback.core.rolling.timebasedrollingpolicy">
<!--输出路径-->
<filenamepattern>${logpath}/server.%d.log</filenamepattern>
</rollingpolicy>
<encoder>
<pattern> %d{yyyy-mm-dd hh:mm:ss.sss} %-5level [%thread] %logger{36} %line - %msg%n</pattern>
<charset>utf-8</charset>
</encoder>
</appender>
<appender name="fileerrorlog" class="ch.qos.logback.core.rolling.rollingfileappender">
<filter class="ch.qos.logback.classic.filter.levelfilter">
<level>error</level>
<onmatch>accept</onmatch>
<onmismatch>deny</onmismatch>
</filter>
<!--滚动策略-->
<rollingpolicy class="ch.qos.logback.core.rolling.timebasedrollingpolicy">
<!--输出路径-->
<filenamepattern>${logpath}/server.%d.error</filenamepattern>
</rollingpolicy>
<encoder>
<pattern> %d{yyyy-mm-dd hh:mm:ss.sss} %-5level [%thread] %logger{36} %line - %msg%n</pattern>
<charset>utf-8</charset>
</encoder>
</appender>
<root level="${loglevel}">
<appender-ref ref="consolelog"/>
<appender-ref ref="filelog"/>
<appender-ref ref="fileerrorlog"/>
</root>
</configuration>
原因分析
1.配置文件位置正确
classes/ ├── application.properties ├── com │ └── nero │ └── test │ ├── api │ │ ├── api.class
2.分析启动日志，分析可能是依赖的jar中有logback.xml配置，冲突导致的问题
解决方案
在application.properties中加入配置：
logging.config=classpath:logback-spring.xml
通过该配置，强制指定日志的配置文件，问题得以解决
springboot logback-spring.xml 配置, 使用不同配置文件中的配置
application.yml
spring:
profiles:
active: prod # active 哪一个配置文件application-dev.yml
logging:
file:
path: d:/var/logapplication-prod.yml
logging:
file:
path: /var/log/questionlogback-spring.xml
<?xml version="1.0" encoding="utf-8"?>
<configuration scan="true" scanperiod="60 seconds" debug="false">
<contextname>wechat-service</contextname>
<!-- !!!!!!!!!获取 application-{xxx}.yml 的配置 !!!!!-->
<springproperty scope="context" name="log.path" source="logging.file.path"/>
<!--<property name="log.path" value="log" />-->
<property name="log.maxhistory" value="15" />
<property name="log.colorpattern" value="%d{yyyy-mm-dd hh:mm:ss} | %highlight(%-5level) | %boldyellow(%thread) | %boldgreen(%logger) | %msg%n"/>
<property name="log.pattern" value="%d{yyyy-mm-dd hh:mm:ss.sss} %contextname [%thread] %-5level %logger{36} - %msg%n" />
<!--输出到控制台-->
<appender name="console" class="ch.qos.logback.core.consoleappender">
<encoder>
<pattern>${log.colorpattern}</pattern>
</encoder>
</appender>
<!--输出到文件 info 级别的 log-->
<appender name="file_info" class="ch.qos.logback.core.rolling.rollingfileappender">
<rollingpolicy class="ch.qos.logback.core.rolling.timebasedrollingpolicy">
<filenamepattern>${log.path}/info/info.%d{yyyy-mm-dd}.log</filenamepattern>
<maxhistory>${log.maxhistory}</maxhistory>
</rollingpolicy>
<encoder>
<pattern>${log.pattern}</pattern>
</encoder>
<filter class="ch.qos.logback.classic.filter.levelfilter">
<level>info</level>
<onmatch>accept</onmatch>
<onmismatch>deny</onmismatch>
</filter>
</appender>
<!--输出到文件 error 级别的 log-->
<appender name="file_error" class="ch.qos.logback.core.rolling.rollingfileappender">
<rollingpolicy class="ch.qos.logback.core.rolling.timebasedrollingpolicy">
<filenamepattern>${log.path}/error/error.%d{yyyy-mm-dd}.log</filenamepattern>
</rollingpolicy>
<encoder>
<pattern>${log.pattern}</pattern>
</encoder>
<filter class="ch.qos.logback.classic.filter.levelfilter">
<level>error</level>
<onmatch>accept</onmatch>
<onmismatch>deny</onmismatch>
</filter>
</appender>
<root level="debug">
<appender-ref ref="console" />
</root>
<root level="info">
<appender-ref ref="file_info" />
<appender-ref ref="file_error" />
</root>
</configuration>从application-xxx.yml 中拿配置
<springproperty scope="context" name="log.path" source="logging.file.path"/>
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持代码网。
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