spring-boot的日志添加行号

 

spring-boot-2.0.5.RELEASE的日志默认是不带行号的，对于开发人员来说比较鸡肋。开发人员更喜欢日志中带有代码的行号，方便定位问题。

所以我们来修改一下spring-boot-2.0.5.RELEASE的logback的默认配置。

找到他的默认配置文件，如下：

spring-boot-2.0.5.RELEASE的默认logback的配置文件：需要使用 vim直接查看

/org/springframework/boot/spring-boot/2.0.5.RELEASE/spring-boot-2.0.5.RELEASE.jar::org/springframework/boot/logging/logback/defaults.xml

 文件内容：

<?xml version="1.0" encoding="UTF-8"?>

<!--
Default logback configuration provided for import, equivalent to the programmatic
initialization performed by Boot
-->

<included>
    <conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
    <conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" />
    <conversionRule conversionWord="wEx" converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter" />
    <property name="CONSOLE_LOG_PATTERN" value="${CONSOLE_LOG_PATTERN:-%clr(%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
    <property name="FILE_LOG_PATTERN" value="${FILE_LOG_PATTERN:-%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>

    <logger name="org.apache.catalina.startup.DigesterFactory" level="ERROR"/>
    <logger name="org.apache.catalina.util.LifecycleBase" level="ERROR"/>
    <logger name="org.apache.coyote.http11.Http11NioProtocol" level="WARN"/>
    <logger name="org.apache.sshd.common.util.SecurityUtils" level="WARN"/>
    <logger name="org.apache.tomcat.util.net.NioSelectorPool" level="WARN"/>
    <logger name="org.eclipse.jetty.util.component.AbstractLifeCycle" level="ERROR"/>
    <logger name="org.hibernate.validator.internal.util.Version" level="WARN"/>
</included>

 查看 logback 的文档可知它打印日志的时候pattern中的变量 %line 表示行号。我们配置application.yum文件。

# logging start
logging.file: "logs/hello.log"
logging:
  file:
    max-size: 10MB
    max-history: 20    
  level:
    root: INFO
    org.springframework: ERROR
  pattern:
    console: "%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%t]){faint} %clr(%-40.40logger{39}){cyan}[lineno:%line]    %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:%wEx}"
    file: "%d{yyyy-MM-dd HH:mm:ss.SSS} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39}[lineno:%line]: %m%n${LOG_EXCEPTION_CONVERSION_WORD:%wEx}"

 

 

仔细观察上面的配置可以看见里面比spring-boot自己的日志文件多了 %line 的内容，这就是行号。

 

参考：

https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-logging.html

https://stackoverflow.com/questions/23123934/logback-show-logs-with-line-number