Spring Boot 日志配置 logback和log4j2

支持日志框架：Java Util Logging, Log4J2 and Logback，默认是使用logback

配置方式：默认配置文件配置和引用外部配置文件配置

一、 默认配置文件配置(不建议使用：不够灵活，对log4j2等不够友好)

# 日志文件名，比如：roncoo.log，或者是 /var/log/roncoo.log

logging.file=roncoo.log

# 日志级别配置，比如： logging.level.org.springframework=DEBUG

logging.level.*=info

logging.level.org.springframework=DEBUG

二、 引用外部配置文件

1 logback配置方式：

spring boot默认会加载classpath:logback-spring.xml或者classpath:logback-spring.groovy

使用自定义配置文件，配置方式为：

logging.config=classpath:logback-roncoo.xml

注意：不要使用logback这个来命名，否则spring boot将不能完全实例化

2.1自定义配置 logback-roncoo.xml

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xml  version = "1.0"  encoding = "UTF-8" ?> < configuration >             < property  name = "PATTERN"  value = "%-12(%d{yyyy-MM-dd HH:mm:ss.SSS}) |-%-5level [%thread] %c [%L] -| %msg%n"  />           < property  name = "TEST_FILE_PATH"  value = "c:/opt/roncoo/logs"  />           < property  name = "PRO_FILE_PATH"  value = "/opt/roncoo/logs"  />             < springProfile  name = "dev" >          < appender  name = "CONSOLE"  class = "ch.qos.logback.core.ConsoleAppender" >              < encoder >                  < pattern >${PATTERN} pattern >              encoder >          appender >                    < logger  name = "com.roncoo.education"  level = "debug" />            < root  level = "info" >              < appender-ref  ref = "CONSOLE"  />          root >      springProfile >             < springProfile  name = "test" >                   < appender  name = "TEST-FILE"  class = "ch.qos.logback.core.rolling.RollingFileAppender" >                           < file >${TEST_FILE_PATH} file >              < rollingPolicy  class = "ch.qos.logback.core.rolling.TimeBasedRollingPolicy" >                                   < fileNamePattern >${TEST_FILE_PATH}/info.%d{yyyy-MM-dd}.log fileNamePattern >                                   < MaxHistory >100 MaxHistory >              rollingPolicy >                            < layout  class = "ch.qos.logback.classic.PatternLayout" >                  < pattern >${PATTERN} pattern >              layout >          appender >                    < root  level = "info" >              < appender-ref  ref = "TEST-FILE"  />          root >      springProfile >             < springProfile  name = "prod" >          < appender  name = "PROD_FILE"  class = "ch.qos.logback.core.rolling.RollingFileAppender" >              < file >${PRO_FILE_PATH} file >              < rollingPolicy  class = "ch.qos.logback.core.rolling.TimeBasedRollingPolicy" >                  < fileNamePattern >${PRO_FILE_PATH}/warn.%d{yyyy-MM-dd}.log fileNamePattern >                  < MaxHistory >100 MaxHistory >              rollingPolicy >              < layout  class = "ch.qos.logback.classic.PatternLayout" >                  < pattern >${PATTERN} pattern >              layout >          appender >                    < root  level = "warn" >              < appender-ref  ref = "PROD_FILE"  />          root >      springProfile > configuration >

2.2 log4j配置

2.2.1去除logback的依赖包，添加log4j2的依赖包

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< dependency >      < groupId >org.springframework.boot groupId >      < artifactId >spring-boot-starter-web artifactId >      < exclusions >          < exclusion >              < groupId >org.springframework.boot groupId >              < artifactId >spring-boot-starter-logging artifactId >          exclusion >      exclusions > dependency > < dependency >      < groupId >org.springframework.boot groupId >      < artifactId >spring-boot-starter-log4j2 artifactId > dependency >

2.2.2 在classpath添加log4j2.xml或者log4j2-spring.xml（spring boot 默认加载）,（可以通过文件名来区分不同环境logging.config=classpath:log4j2-dev.xml，logging.config=classpath:log4j2-test.xml,logging.config=classpath:log4j2-prod.xml）

2.3 自定义配置文件 log4j2-dev.xml

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xml  version = "1.0"  encoding = "utf-8" ?> < configuration >      < properties >                   < property  name = "PATTERN" >%d{yyyy-MM-dd HH:mm:ss.SSS} |-%-5level [%thread] %c [%L] -| %msg%n property >      properties >        < appenders >          < Console  name = "CONSOLE"  target = "system_out" >              < PatternLayout  pattern = "${PATTERN}"  />          Console >      appenders >            < loggers >          < logger  name = "com.roncoo.education"  level = "debug"  />          < root  level = "info" >              < appenderref  ref = "CONSOLE"  />          root >      loggers >   configuration >

三．比较

性能比较：Log4J2 和 Logback 都优于 log4j（不推荐使用）

配置方式：Logback最简洁，spring boot默认，推荐使用

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参考：http://www.roncoo.com/article/detail/125333