26.SpringBoot学习笔记--切换日志框架

切换日志框架

可以按照 SLF4J 的日志适配图，进行相关的切换。

SLF4J + Log4j 的方式

配置 pom.xml

<dependencies>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-webartifactId>
        <exclusions>
            <exclusion>
                <artifactId>logback-classicartifactId>
                <groupId>ch.qos.logbackgroupId>
            exclusion>
        exclusions>
    dependency>

    <dependency>
        <groupId>org.slf4jgroupId>
        <artifactId>slf4j-log4j12artifactId>
    dependency>
dependencies>

配置 log4j.properties

### set log levels ###
log4j.rootLogger = debug ,  stdout ,  D ,  E

### 输出到控制台 ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern =  %d{ABSOLUTE} ===== %5p %c{ 1 }:%L - %m%n

#### 输出到日志文件 ###
#log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
#log4j.appender.D.File = logs/log.log
#log4j.appender.D.Append = true
#log4j.appender.D.Threshold = DEBUG ## 输出DEBUG级别以上的日志
#log4j.appender.D.layout = org.apache.log4j.PatternLayout
#log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
#
#### 保存异常信息到单独文件 ###
#log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
#log4j.appender.D.File = logs/error.log ## 异常日志文件名
#log4j.appender.D.Append = true
#log4j.appender.D.Threshold = ERROR ## 只输出ERROR级别以上的日志!!!
#log4j.appender.D.layout = org.apache.log4j.PatternLayout
#log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

切换为 Log4j 2

可以参考 Spring Boot 官方文档：

https://docs.spring.io/spring-boot/docs/2.3.0.RELEASE/reference/html/using-spring-boot.html#using-boot-starter

Name	Description
spring-boot-starter-jetty	Starter for using Jetty as the embedded servlet container. An alternative to spring-boot-starter-tomcat
spring-boot-starter-log4j2	Starter for using Log4j2 for logging. An alternative to spring-boot-starter-logging
spring-boot-starter-logging	Starter for logging using Logback. Default logging starter
spring-boot-starter-reactor-netty	Starter for using Reactor Netty as the embedded reactive HTTP server.
spring-boot-starter-tomcat	Starter for using Tomcat as the embedded servlet container. Default servlet container starter used by spring-boot-starter-web
spring-boot-starter-undertow	Starter for using Undertow as the embedded servlet container. An alternative to spring-boot-starter-tomcat

配置 pom.xml

<dependencies>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-webartifactId>
        <exclusions>
            <exclusion>
                <artifactId>spring-boot-starter-loggingartifactId>
                <groupId>org.springframework.bootgroupId>
            exclusion>
        exclusions>
    dependency>
    
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-log4j2artifactId>
    dependency>
dependencies>