淺談spring boot 集成 log4j 解決與logback沖突的問題

更新時(shí)間：2020年02月20日 09:14:33 作者：思念是荒蕪的夢(mèng)

今天小編就為大家分享一篇淺談spring boot 集成 log4j 解決與logback沖突的問題，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。一起跟隨小編過來看看吧

現(xiàn)在很流行springboot的開發(fā)，小編閑來無事也學(xué)了學(xué)，開發(fā)過程中遇見了log4j日志的一個(gè)小小問題，特此記載。

首先在pox.xml中引入對(duì)應(yīng)的maven依賴：

    <!-- 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（摘抄自網(wǎng)上）：

log4j.rootLogger=info,error,CONSOLE,DEBUG
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
log4j.logger.error=error
log4j.appender.error=org.apache.log4j.DailyRollingFileAppender
log4j.appender.error.layout=org.apache.log4j.PatternLayout
log4j.appender.error.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
log4j.appender.error.datePattern='.'yyyy-MM-dd
log4j.appender.error.Threshold = error
log4j.appender.error.append=true
log4j.appender.error.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application.yml中加入如下配置：

logging:
 config: src/main/resources/log4j.properties

至此，log4j的配置完畢，啟動(dòng)項(xiàng)目，發(fā)現(xiàn)會(huì)報(bào)錯(cuò)：

SLF4J: Class path contains multiple SLF4J bindings.
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]
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]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
12:02:26.963 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Included patterns for restart : []
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/]
12:02:26.969 [main] DEBUG org.springframework.boot.devtools.restart.ChangeableUrls - Matching URLs for reloading : [file:/F:/work_intel/code/demo1/target/classes/]
Logging system failed to initialize using configuration from 'src/main/resources/log4j.properties'

這是因?yàn)榕clogback的沖突并未解決，導(dǎo)致啟動(dòng)失敗，根據(jù)上面的報(bào)錯(cuò)信息，找到logback-classic-1.2.3.jar和slf4j-log4j12-1.7.25.jar的相應(yīng)位置刪除，并在pom.xml中加入如下排除代碼：

   <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <!-- 排除默認(rèn)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>

啟動(dòng)發(fā)現(xiàn)一切正常，至此，log4j的配置完畢。

以上這篇淺談spring boot 集成 log4j 解決與logback沖突的問題就是小編分享給大家的全部?jī)?nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。

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