Spring Boot log configuration (ii)

Support Log Framework : Java Util Logging , Log4J2 and Logback , default is to use logback
How to configure : Default profile configuration and reference external configuration file configuration

1. Default configuration file Configuration

• Not recommended: Not flexible enough, not log4j2 friendly

  # 日志文件名，比如：roncoo.log，或者是 /var/log/roncoo.loglogging.file=roncoo.log # 日志级别配置，比如： logging.level.org.springframework=DEBUGlogging.level.*=infologging.level.org.springframework=DEBUG

2, Configuration Logback

• referencing external configuration files

  Spring boot is loaded by default classpath:logback-spring.xml or classpath:logback-spring.groovy .
  Use a custom configuration file that is configured as follows: logging.config=classpath:logback-roncoo.xml Note: Do not use Logback to name it, otherwise spring boot will not be fully instantiated.

  ① using spring boot-based configuration

  <?xml version="1.0" encoding="UTF-8"?><configuration><include resource="org/springframework/boot/logging/logback/base.xml"/><logger name="org.springframework.web" level="DEBUG"/></configuration>

  ② Custom Configuration

  <?xml version= "1.0" encoding= "UTF-8"?><configuration> <!--file output format--<property name= "PATTERN" Value= "%-12 (%d{yyyy-mm-dd HH:mm:ss. SSS}) |-%-5level [%thread]%c [%l]-| %msg%n "/> <!--TEST file path--<property name=" Test_file_path "value=" Logs/info "/> <!--Pro file path --<property name= "Pro_file_path" value= "Logs/warn"/> <!--development environment--<springprofile name= "Dev"                > <appender name= "CONSOLE" class= "Ch.qos.logback.core.ConsoleAppender" > <encoder> <pattern>${PATTERN}</pattern> </encoder> </appender> <logger N Ame= "Com.roncoo.education" level= "Debug"/> <root level= "info" > <appender-ref ref= "CONSOLE"/ > </root> </springProfile> <!--test environment-<springprofile name= "Test" > &lt ;! --Generate one file per day--<appender name= "Test-file" class= "CH.QOS.LOgback.core.rolling.RollingFileAppender "> <!--file path--<file>${test_file_path}</f  ile> <rollingpolicy class= "Ch.qos.logback.core.rolling.TimeBasedRollingPolicy" > <!--                File name-<fileNamePattern>${TEST_FILE_PATH}.%d{yyyy-MM-dd}.log</fileNamePattern>            <!--file maximum saved history-<MaxHistory>100</MaxHistory> </rollingPolicy> <layout class= "Ch.qos.logback.classic.PatternLayout" > <pattern>${pattern}</pattern > </layout> </appender> <root level= "info" > <appender-ref ref= "Test-file"/> </root> </springProfile> <!--production Environment--<springprofile name= "prod" &G        T <appender name= "Prod_file" class= "Ch.qos.logback.core.rolling.RollingFileAppender" > <file>${pro_fil E_path}</file> <rollingpolicy class= "Ch.qos.logback.core.rolling.TimeBasedRollingPolicy" > <file Namepattern>${pro_file_path}.%d{yyyy-mm-dd}.log</filenamepattern> <maxhistory>100</maxhis                tory> </rollingPolicy> <layout class= "Ch.qos.logback.classic.PatternLayout" > <pattern>${PATTERN}</pattern> </layout> </appender> <root level = "Warn" > <appender-ref ref= "prod_file"/> </root> </springprofile></configura Tion>

3, Configuration log4j

• referencing external configuration files

  Remove Logback Dependency package, add log4j2 dependency Package

  <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><!-- 使用log4j2 --><dependency>    <groupId>org.springframework.boot</groupId>    <artifactId>spring-boot-starter-log4j2</artifactId></dependency>

  ① in classpath add log4j2.xml or log4j2-spring.xml (Spring boot default load)

  ② a custom configuration file

  <?xml version="1.0" encoding="utf-8"?><configuration>    <properties>        <!-- 文件输出格式 -->        <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>

4. Comparison

• Performance comparison: Log4J2 and Logback both superior log4j (not recommended)
• How to configure: Logback the most concise, spring boot default, recommended to use

5, Configuration logging

• Reference documents

6. List of acknowledgements

• Feng Yongwei

Spring Boot log configuration (ii)