3.门面Slf4j+logback

1.导入pomyil

<!--slf4j core 使用slf4j必須添加-->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.27</version>
</dependency>
<!-- 2.使用logback实现 -->
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.2.3</version>
</dependency>

2.默认使用logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <property name="pattern" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %c [%thread] %-5level %msg%n"/> 
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender"> 
        <target>System.err</target> <!--日志格式配置-->
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${pattern}</pattern>
        </encoder>
    </appender> 
    <root level="ALL">
        <appender-ref ref="console"/>
    </root>
</configuration>

3.使用

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Test {
    private final static Logger log = LoggerFactory.getLogger(Test.class);
    public static void main(String[] args) {
        log.info("ddddd");
    }
}