log4j2
还没引入之前日志
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.4.5)
2021-05-22 19:43:52.577 INFO 19252 --- [ main] c.g.c.h.s.SpringBootLearnApplication : Starting SpringBootLearnApplication using Java 1.8.0_202 on DESKTOP-6ANCF3P with PID 19252 (D:\learn\experiment\Java\learn\spring-boot-learn\target\classes started by hong in D:\learn\experiment\Java\learn)
2021-05-22 19:43:52.579 INFO 19252 --- [ main] c.g.c.h.s.SpringBootLearnApplication : No active profile set, falling back to default profiles: default
2021-05-22 19:43:53.140 INFO 19252 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-05-22 19:43:53.146 INFO 19252 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-05-22 19:43:53.146 INFO 19252 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.45]
2021-05-22 19:43:53.147 INFO 19252 --- [ main] o.a.catalina.core.AprLifecycleListener : An older version [1.2.21] of the Apache Tomcat Native library is installed, while Tomcat recommends a minimum version of [1.2.23]
2021-05-22 19:43:53.147 INFO 19252 --- [ main] o.a.catalina.core.AprLifecycleListener : Loaded Apache Tomcat Native library [1.2.21] using APR version [1.6.5].
2021-05-22 19:43:53.147 INFO 19252 --- [ main] o.a.catalina.core.AprLifecycleListener : APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
2021-05-22 19:43:53.147 INFO 19252 --- [ main] o.a.catalina.core.AprLifecycleListener : APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
2021-05-22 19:43:53.149 INFO 19252 --- [ main] o.a.catalina.core.AprLifecycleListener : OpenSSL successfully initialized [OpenSSL 1.1.1a 20 Nov 2018]
2021-05-22 19:43:53.194 INFO 19252 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-05-22 19:43:53.194 INFO 19252 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 582 ms
food : Food{meet='beef', fruit='apple', vegetable='tomato', drink='milk'}
2021-05-22 19:43:53.305 INFO 19252 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-05-22 19:43:53.411 INFO 19252 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-05-22 19:43:53.418 INFO 19252 --- [ main] c.g.c.h.s.SpringBootLearnApplication : Started SpringBootLearnApplication in 1.131 seconds (JVM running for 1.838)
MyApplicationRunner class will be execute when the project was started!
修改后
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.4.5)
19:53:04.651 [main] [INFO ] cn.gd.cz.hong.springbootlearn.SpringBootLearnApplication:55 --- Starting SpringBootLearnApplication using Java 1.8.0_202 on DESKTOP-6ANCF3P with PID 19744 (D:\learn\experiment\Java\learn\spring-boot-learn\target\classes started by hong in D:\learn\experiment\Java\learn)
19:53:04.657 [main] [INFO ] cn.gd.cz.hong.springbootlearn.SpringBootLearnApplication:675 --- No active profile set, falling back to default profiles: default
19:53:05.198 [main] [INFO ] org.springframework.boot.web.embedded.tomcat.TomcatWebServer:108 --- Tomcat initialized with port(s): 8080 (http)
19:53:05.208 [main] [INFO ] org.apache.coyote.http11.Http11NioProtocol:173 --- Initializing ProtocolHandler ["http-nio-8080"]
19:53:05.208 [main] [INFO ] org.apache.catalina.core.StandardService:173 --- Starting service [Tomcat]
19:53:05.209 [main] [INFO ] org.apache.catalina.core.StandardEngine:173 --- Starting Servlet engine: [Apache Tomcat/9.0.45]
19:53:05.210 [main] [INFO ] org.apache.catalina.core.AprLifecycleListener:173 --- An older version [1.2.21] of the Apache Tomcat Native library is installed, while Tomcat recommends a minimum version of [1.2.23]
19:53:05.210 [main] [INFO ] org.apache.catalina.core.AprLifecycleListener:173 --- Loaded Apache Tomcat Native library [1.2.21] using APR version [1.6.5].
19:53:05.210 [main] [INFO ] org.apache.catalina.core.AprLifecycleListener:173 --- APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
19:53:05.210 [main] [INFO ] org.apache.catalina.core.AprLifecycleListener:173 --- APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
19:53:05.212 [main] [INFO ] org.apache.catalina.core.AprLifecycleListener:173 --- OpenSSL successfully initialized [OpenSSL 1.1.1a 20 Nov 2018]
19:53:05.255 [main] [INFO ] org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/]:173 --- Initializing Spring embedded WebApplicationContext
19:53:05.255 [main] [INFO ] org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext:289 --- Root WebApplicationContext: initialization completed in 541 ms
food : Food{meet='beef', fruit='apple', vegetable='tomato', drink='milk'}
19:53:05.354 [main] [INFO ] org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor:181 --- Initializing ExecutorService 'applicationTaskExecutor'
19:53:05.448 [main] [INFO ] org.apache.coyote.http11.Http11NioProtocol:173 --- Starting ProtocolHandler ["http-nio-8080"]
19:53:05.460 [main] [INFO ] org.springframework.boot.web.embedded.tomcat.TomcatWebServer:220 --- Tomcat started on port(s): 8080 (http) with context path ''
19:53:05.467 [main] [INFO ] cn.gd.cz.hong.springbootlearn.SpringBootLearnApplication:61 --- Started SpringBootLearnApplication in 1.074 seconds (JVM running for 2.001)
MyApplicationRunner class will be execute when the project was started!
集成log4j2过程
- 引入 spring-boot-starter-log4j2
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
直接启动会出现下面这个报错 虽然不影响启动 但是启动爆这个错总感觉哪里不对劲
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/D:/app/code/maven/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/D:/app/code/maven/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.13.3/log4j-slf4j-impl-2.13.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
排查
日志包引用冲突
排除后 自动使用的原因
日志使用sl4j原因
最后使用的日志框架参照
sl4j框架转换-桥接模式
桥接模式
主要思想： 将继承关系转化为组合关系
配置文件 log4j2-spring.xml
<?xml version="1.0" encoding="UTF-8"?>
<!--
status="warn" 日志框架本身的输出日志级别
monitorInterval="5" 自动加载配置文件的间隔时间，不低于 5 秒
-->
<Configuration status="error" monitorInterval="5">
<!--日志处理-->
<Appenders>
<!--控制台输出 appender-->
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] [%-5level] %c{36}:%L --- %m%n" />
</Console>
</Appenders>
<!--logger 定义-->
<Loggers>
<!--使用 rootLogger 配置 日志级别 level="trace"-->
<Root level="info">
<!--指定日志使用的处理器-->
<AppenderRef ref="Console" />
</Root>
</Loggers>
</Configuration>
相关配置可查看 使用 XML 进行配置
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