@[toc]

  • Configuration must depend on packagesYou can find the latest version yourself 
    <! -- Lombok dependencies -->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>${lombok-version}</version>
	<scope>provided</scope>
</dependency>
<! -- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.11.1</version>
</dependency>
<! -- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-api -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.11.1</version>
</dependency>
<! - slf4j and bridging log4j2 log4j) - slf4j - impl, role is to use slf4j API, but the underlying implementation is based on log4j2 - >
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
    <version>2.11.1</version>
</dependency>
<! -- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.25</version>
</dependency>
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  • Configure the log4j2.xml file

The log4j2.xml file can be configured as XML, and also supports the properties file format. Here I use XML. This file is stored in the project SRC /main/resources, and can be automatically read because of the file name. xml

logs < property name = “PATTERN” > % d {MM – dd yyyy – HH: MM: ss. The SSS} [% t – % L] % 5 level % C % M % n % M – < / property > < / Properties >

< TimeBasedTriggeringPolicy interval = “1” modulate = “true” / >
< SizeBasedTriggeringPolicy size = “5 MB” / > < / Policies >





  • Use the @slf4J annotation on the class in code and then use the log.info form internally