Spring boot logging
文章目录
源码
源码链接 https://gitee.com/mayun_xiaodu/spring-boot-all
上一节 Spring boot 配置文件读取和yaml结构
首先我们搭一个web工程，集成spring-boot-starter-web；spring-boot-starter-web中依赖了spring-boot-starter-logging；
启动springboot
springboot 启动日志
springboot 提供的默认输出日志
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.6.RELEASE)
2021-03-29 09:55:06.451 INFO 80640 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-03-29 09:55:06.473 INFO 80640 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-03-29 09:55:06.473 INFO 80640 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.21]
2021-03-29 09:55:06.566 INFO 80640 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-03-29 09:55:06.566 INFO 80640 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1249 ms
2021-03-29 09:55:06.753 INFO 80640 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-03-29 09:55:06.882 INFO 80640 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
自定义logging
（这里使用 slf4j + logback 进行示例）
1.配置文件中设置日志参数
logging:
level:
root: info # 配置root 的级别
com.xiaodu.springboot.logging: warn # 配置具体包下的日志级别
file:
max-size: 10KB
max-history: 7
path: logging-logs
pattern:
## %d{日期格式} %level 日志级别 %t 线程 %logger{length} logger名 %m 日志内容 %L 日志输出的行数， %n 换行；
console: '%d{yyyy-MM-dd HH:mm:ss.SSS} [%level] [%15t] %logger{20} => %m Line: %L%n'
代码中输出日志
// 进行日志输出
log.trace("trace => {}", "springboot-logging");
log.debug("debug => {}", "springbooot-logging");
log.info("info => {}", "springboot-logging");
log.warn("warn => {}", "springboot-logging");
log.error("error => {}", "springboot-logging");
在配置文件中设置了日志的root 为info级别， com.xiaodu.springboot.logging 包下的logger为warn级别；日志文件最大10KB， 保存7天；存放路径为 loggin-logs目录下；并自定义了日志输出的console格式
启动程序
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.6.RELEASE)
2021-03-29 11:15:52.700 [INFO] [ main] o.s.b.w.e.t.TomcatWebServer => Tomcat initialized with port(s): 8080 (http) Line: 90
2021-03-29 11:15:52.719 [INFO] [ main] o.a.c.c.StandardService => Starting service [Tomcat] Line: 173
2021-03-29 11:15:52.719 [INFO] [ main] o.a.c.c.StandardEngine => Starting Servlet engine: [Apache Tomcat/9.0.21] Line: 173
2021-03-29 11:15:52.799 [INFO] [ main] o.a.c.c.C.[.[.[/] => Initializing Spring embedded WebApplicationContext Line: 173
2021-03-29 11:15:52.799 [INFO] [ main] o.s.w.c.ContextLoader => Root WebApplicationContext: initialization completed in 1360 ms Line: 283
2021-03-29 11:15:52.938 [INFO] [ main] o.s.s.c.ThreadPoolTaskExecutor => Initializing ExecutorService 'applicationTaskExecutor' Line: 171
2021-03-29 11:15:53.069 [INFO] [ main] o.s.b.w.e.t.TomcatWebServer => Tomcat started on port(s): 8080 (http) with context path '' Line: 202
2021-03-29 11:15:53.072 [WARN] [ main] c.x.s.l.LoggingApplication => warn => springboot-logging Line: 28
2021-03-29 11:15:53.074 [ERROR] [ main] c.x.s.l.LoggingApplication => error => springboot-logging Line: 29
2.使用日志文件配置logging
resources 下创建 logback.xml
具体的java 日志规范这里不再阐述。
创建一个简单的logback.xml； 配置了 root, logger, layout, appender
<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
<property name="APP_NAME" value = "springboot-logging-test"/>
<!--输出到控制台-->
<appender name = "console" class="ch.qos.logback.core.ConsoleAppender">
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<pattern>${APP_NAME} -- %d{yyyy-MM-dd HH:mm:ss.SSS} [%level] [%15t] %logger{20} => %m Line: %L%n</pattern>
</encoder>
</appender>
<!--输出到文件-->
<appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
<File>springboot-log-test/${APP_NAME}_stdout.log</File>
<!-- 配置文件滚动策略 -->
<rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
<!-- 滚动生成的文件名称-->
<FileNamePattern>springboot-log-test/${APP_NAME}_stdout.%d{yyyy-MM-dd}-%i.log</FileNamePattern>
<!-- 最大保存7天的日志 -->
<maxHistory>7</maxHistory>
<!-- 日志文件超过5kb后，生成一个新的文件记录日志-->
<MaxFileSize>5KB</MaxFileSize>
</rollingPolicy>
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<pattern>${APP_NAME} -- %d{yyyy-MM-dd HH:mm:ss.SSS} [%level] [%15t] %logger{20} => %m Line: %L%n</pattern>
</encoder>
</appender>
<logger name ="com.xiaodu.springboot.logging">
<level value = "debug"/>
</logger>
<root>
<level value="info"/>
<appender-ref ref="console"/>
<appender-ref ref="file"/>
</root>
</configuration>
以上配置后我们打印的日志
springboot-logging-test -- 2021-03-29 12:07:54.944 [DEBUG] [ main] c.x.s.l.LoggingApplication => Running with Spring Boot v2.1.6.RELEASE, Spring v5.1.8.RELEASE Line: 53
springboot-logging-test -- 2021-03-29 12:07:54.945 [INFO] [ main] c.x.s.l.LoggingApplication => No active profile set, falling back to default profiles: default Line: 646
springboot-logging-test -- 2021-03-29 12:07:56.164 [INFO] [ main] o.s.b.w.e.t.TomcatWebServer => Tomcat initialized with port(s): 8080 (http) Line: 90
springboot-logging-test -- 2021-03-29 12:07:56.223 [INFO] [ main] o.a.c.h.Http11NioProtocol => Initializing ProtocolHandler ["http-nio-8080"] Line: 173
springboot-logging-test -- 2021-03-29 12:07:56.229 [INFO] [ main] o.a.c.c.StandardService => Starting service [Tomcat] Line: 173
springboot-logging-test -- 2021-03-29 12:07:56.229 [INFO] [ main] o.a.c.c.StandardEngine => Starting Servlet engine: [Apache Tomcat/9.0.21] Line: 173
springboot-logging-test -- 2021-03-29 12:07:56.299 [INFO] [ main] o.a.c.c.C.[.[.[/] => Initializing Spring embedded WebApplicationContext Line: 173
springboot-logging-test -- 2021-03-29 12:07:56.299 [INFO] [ main] o.s.w.c.ContextLoader => Root WebApplicationContext: initialization completed in 1289 ms Line: 283
springboot-logging-test -- 2021-03-29 12:07:56.461 [INFO] [ main] o.s.s.c.ThreadPoolTaskExecutor => Initializing ExecutorService 'applicationTaskExecutor' Line: 171
springboot-logging-test -- 2021-03-29 12:07:56.561 [INFO] [ main] o.a.c.h.Http11NioProtocol => Starting ProtocolHandler ["http-nio-8080"] Line: 173
springboot-logging-test -- 2021-03-29 12:07:56.582 [INFO] [ main] o.s.b.w.e.t.TomcatWebServer => Tomcat started on port(s): 8080 (http) with context path '' Line: 202
springboot-logging-test -- 2021-03-29 12:07:56.584 [INFO] [ main] c.x.s.l.LoggingApplication => Started LoggingApplication in 1.972 seconds (JVM running for 2.929) Line: 59
springboot-logging-test -- 2021-03-29 12:07:56.586 [DEBUG] [ main] c.x.s.l.LoggingApplication => debug => springbooot-logging Line: 26
springboot-logging-test -- 2021-03-29 12:07:56.586 [INFO] [ main] c.x.s.l.LoggingApplication => info => springboot-logging Line: 27
springboot-logging-test -- 2021-03-29 12:07:56.587 [WARN] [ main] c.x.s.l.LoggingApplication => warn => springboot-logging Line: 28
springboot-logging-test -- 2021-03-29 12:07:56.587 [ERROR] [ main] c.x.s.l.LoggingApplication => error => springboot-logging Line: 29
日志文件保存路径
也可以直接生成压缩包, 修改文件后缀即可
<FileNamePattern>springboot-log-test/${APP_NAME}_stdout.%d{yyyy-MM-dd}-%i.log.gz</FileNamePattern>
springboot 对logback中的扩展支持
resources 下创建 logback-spring.xml
(springboot 优先加载 “logback-test.groovy”, “logback-test.xml”,
“logback.groovy”, “logback.xml”, 若classpath下没有发现以上文件，则加载
“logback-test-spring.groovy”, “logback-test-spring.xml”,
“logback-spring.groovy”, “logback-spring.xml” 日志配置文件)
我们现在使用logback-spring.xml， 然后 把 logback.xml 临时改下名称 logback-temp.xml或者删除也可以
logback-spring.xml
spring 特有的日志标签
- springProperty 获取spring配置信息
- springProfile 根据spring.profile.active 进行不同的环境使用不同的日志配置
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<!--获取spirng配置信息-->
<springProperty name = "AAA" source = "spring.application.name"/>
<appender name = "console" class = "ch.qos.logback.core.ConsoleAppender">
<Target>System.out</Target>
<encoder>
<pattern>${AAA}%d{yyyy-MM-dd HH:mm:ss.SSS} [%level] [%t] %c{20} => %m%n</pattern>
</encoder>
</appender>
<!--根据spring.profiles.active 指定环境 使用不同logger进行不同环境中的不同级别日志打印-->
<springProfile name = "dev | test">
<logger name = "com.xiaodu.springboot.logging">
<level value = "debug"/>
</logger>
</springProfile>
<springProfile name = "prod">
<logger name = "com.xiaodu.springboot.logging">
<level value = "warn"/>
</logger>
</springProfile>
<root>
<level value="info"/>
<appender-ref ref="console"/>
</root>
</configuration>
上述是一个简单的日志配置文件； springboot 提供了 springProperty 属性进行获取环境配置信息，
springprofile 进行获取 spring.profiles.active信息；根据不同的开发，测试，生成环境进行不同的日志输出
控制台日志颜色输出
logback 自带的日志显示
%{color}(日志内容) 表示
示例：
- %red(%t)
- %blue(%logger)
…
完整示例
<pattern>%magenta(${AAA}) – %d{yyyy-MM-dd HH:mm:ss.SSS} %red([%5level]) %blue([%10t]) %cyan(%40logger{39}) : %yellow(%m) %n</pattern>
springboot 提供的 %clr
格式： %clr(日志内容){color}； 不指定color时可以根据日志的级别自动显示颜色
springboot 提供了日志颜色转换器，ColorConverter
<!-- 日志颜色转换器 -->
<conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
...
<!--springboot 支持的 颜色转换，可以自动根据日志级别显示不同的颜色-->
<pattern>%clr(${AAA}){magenta} -- %d{yyyy-MM-dd HH:mm:ss.SSS} %clr([%5level]) %blue([%10t]) %cyan(%40logger{39}) : %clr(%m) %n</pattern>
常用的颜色
- faint
- red
- green
- yellow
- blue
- magenta
- cyan
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