Log4j2

参考资料

• https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-log4j2

pom.xml

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-log4j2 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
    <version>2.1.5.RELEASE</version>
</dependency>

安装

首先需要屏蔽 Spring Boot 自带的 Log 工具，修改 pom.xml

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
  <exclusions>
    <exclusion>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-logging</artifactId>
    </exclusion>
  </exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-log4j2 -->
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>

配置

新建 resources/log4j2.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
    </Console>
  </Appenders>
  <Loggers>
    <Root level="error">
      <AppenderRef ref="Console"/>
    </Root>
  </Loggers>
</Configuration>

在 application.properties 中配置：

 logging.config=classpath:log4j2.xml

这里有一个官方的配置参考：https://logging.apache.org/log4j/2.x/manual/configuration.html#XML

使用

package com.example.demo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
 * 演示如何使用 Logger
 *
 * @author Where
 */
public class Demo {
    private static final Logger logger = LoggerFactory.getLogger(Demo.class);
    public void index() {
        logger.info("index");
    }
}