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

<? 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

< 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

<? 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

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

Spring Boot 日志配置 logback和log4j2

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