springboot集成log4j解决与logback冲突问题
现在很流⾏springboot的开发，⼩编闲来⽆事也学了学，开发过程中遇见了log4j⽇志的⼀个⼩⼩问题，特此记载。
⾸先在l中引⼊对应的maven依赖：
<!-- 引⼊log4j-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j</artifactId>
<version>1.3.8.RELEASE</version>
</dependency>
然后在src/resources/下新建log4j.properties⽂件（摘抄⾃⽹上）：
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
log4j.logger.info=info
log4j.appender.info=org.apache.log4j.DailyRollingFileAppender
log4j.appender.info.layout=org.apache.log4j.PatternLayout
log4j.appender.info.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
log4j.appender.info.datePattern='.'yyyy-MM-dd
log4j.appender.info.Threshold = info
log4j.appender.info.append=true
log4j.appender.info.File=d://springboot3/logs/api_services_info.log
=error
=org.apache.log4j.DailyRollingFileAppender
layout=org.apache.log4j.PatternLayout
layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
datePattern='.'yyyy-MM-dd
Threshold = error
append=true
File=d://springboot3/logs/error/api_services_error.log
log4j.logger.DEBUG=DEBUG
log4j.appender.DEBUG=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DEBUG.layout=org.apache.log4j.PatternLayout
log4j.appender.DEBUG.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
log4j.appender.DEBUG.datePattern='.'yyyy-MM-dd
log4j.appender.DEBUG.Threshold = DEBUG
log4j.appender.DEBUG.append=true
log4j.appender.DEBUG.File=d://springboot3/logs/debug/api_services_debug.log
  在l中加⼊如下配置：
logging:
log4j与log4j2
config: src/main/resources/log4j.properties
⾄此，log4j的配置完毕，启动项⽬，发现会报错：
1.
SLF4J: Class path contains multiple SLF4J bindings.
2.
SLF4J: Found binding in [jar:file:/C:/Users/tony/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-
1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
3.
SLF4J: Found binding in [jar:file:/C:/Users/tony/.m2/repository/org/slf4j/slf4j-log4j12/1.7.25/slf4j-log4j12-
1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
4.
SLF4J: See /codes.html#multiple_bindings for an explanation.
5.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
6.
12:02:26.963 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Included patterns for restart : []
7.
12:02:26.969 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Excluded patterns for restart : [/spring-boot-actuator/target/classes/, /spring-boot-devtools/target/classes/, /spring-boot/target/classes/, /spring-boot-starter-[\w-]+/, /spring-boot-autoconfigure/target/classes/, /spring-boot-starter/target/classes/]
8.
12:02:26.969 [main] DEBUG org.springframework.start.ChangeableUrls - Matching URLs for reloading :
[file:/F:/work_intel/code/demo1/target/classes/]
9.
Logging system failed to initialize using configuration from 'src/main/resources/log4j.properties'
这是因为与logback的冲突并未解决，导致启动失败，根据上⾯的报错信息，到logback-classic-1.2.3.jar和slf4j-log4j12-1.7.25.jar的相应位置删除，并在l中加⼊如下排除代码：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- 排除默认的logback⽇志，使⽤log4j-->
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
启动发现⼀切正常，⾄此，log4j的配置完毕。

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。