项目结构

在这里插入图片描述

maven依赖

<dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>2.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-jcl</artifactId>
            <version>2.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.3</version>
        </dependency>

log4j2.xml配置文件

配置文件详细说明：
https://blog.csdn.net/qq_26264237/article/details/89482985

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>  
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{yy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
        </Console>
    </Appenders>
    <Loggers>
        <logger name="org.springframework" level="info"></logger>
        <root level="info">
            <AppenderRef ref="Console" />
        </root>
    </Loggers>
</Configuration>

java例子

package com.sky;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MyAppSlf4j { 
    private final static Logger log = LoggerFactory.getLogger(MyAppSlf4j.class);
    public static void main(String[] args) { 
        log.trace("{} level", "trace");
        log.debug("{} level", "debug");
        log.info("{} level", "info");
        log.warn("{} level", "warn");
        log.error("{} level", "error");
    }
}

输出结果

19-05-18 17:58:53.577 [main] INFO  com.sky.MyAppSlf4j - info level
19-05-18 17:58:53.577 [main] WARN  com.sky.MyAppSlf4j - warn level
19-05-18 17:58:53.577 [main] ERROR com.sky.MyAppSlf4j - error level