<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <!--日志输出格式-->
    <property name="pattern" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %c [%thread]%-5level %msg%n"/>

    <!-- Appender: 设置日志信息的去向,常用的有以下几个
        ch.qos.logback.core.ConsoleAppender (控制台)
        ch.qos.logback.core.rolling.RollingFileAppender (文件大小到达指定尺寸的时候产生一个新文件)
        ch.qos.logback.core.FileAppender (文件)
    -->
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <!--输出流对象 默认 System.out 改为 System.err-->
        <target>System.err</target>
        <!--日志格式配置-->
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${pattern}</pattern>
        </encoder>
    </appender>

    <!--用来设置某一个包或者具体的某一个类的日志打印级别、以及指定<appender>。 -->
    <root level="ALL">
        <appender-ref ref="console"/>
    </root>
</configuration>

    public static void main(String[] args) {
        Logger LOGGER = LoggerFactory.getLogger(LogbackTest.class);
        //打印日志信息
        LOGGER.error("error");
        LOGGER.warn("warn");
        LOGGER.info("info");
        LOGGER.debug("debug");
        LOGGER.trace("trace");
    }

2022-10-23 17:47:45.044 org.log.LogbackTest [main]ERROR error
2022-10-23 17:47:45.046 org.log.LogbackTest [main]WARN  warn
2022-10-23 17:47:45.047 org.log.LogbackTest [main]INFO  info
2022-10-23 17:47:45.047 org.log.LogbackTest [main]DEBUG debug
2022-10-23 17:47:45.047 org.log.LogbackTest [main]TRACE trace

<!-- Log4j2日志API -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.11.1</version>
</dependency>
<!-- Log4j2 日志实现 -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.11.1</version>
</dependency>

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

    public static void main(String[] args) {
        Logger LOGGER = LogManager.getLogger(Log4j2Test.class);
        LOGGER.fatal("fatal");
        LOGGER.error("error");
        LOGGER.warn("warn");
        LOGGER.info("info");
        LOGGER.debug("debug");
        LOGGER.trace("trace");
    }