弄了三天，收获其实不小，终于到最后收尾了。

一，SLF4j与Log4j2的集成

1，先把需要的东搞到手

image.png

2，把这些包加载到项目中

image.png

3，写配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<Configuration status="WARN">
    <Appenders>
        <Console name="console" target="SYSTEM_OUT">
            <PatternLayout pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss} [%t] - %msg%n" />
        </Console>
    </Appenders>
    <Loggers>
        <Root level="info" additivity="false">
            <AppenderRef ref="console" />
        </Root>
    </Loggers>
</Configuration>

4，测试

package demo.log;

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


public class DemoExample {

    public static void main(String[] args) {
        // System.setProperty(SimpleLogger.DEFAULT_LOG_LEVEL_KEY, "DEBUG");
        Logger logger = LoggerFactory.getLogger(DemoExample.class);
        logger.info("Info Message");
        logger.error("Error Message");
        logger.warn("Warn Message");
        logger.debug("Debug Message");
        logger.trace("Trace Message");
    }
}

二，SLF4j与Logback的集成

1，加载包

image.png

2，配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<configuration>
    <appender name="consoleAppender" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>
                %d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{55} - %msg%n
            </pattern>
        </encoder>
    </appender>
    <root level="debug">
        <appender-ref ref="consoleAppender" />
    </root>
</configuration>

3，测试

package demo.log;

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


public class DemoExample {

    public static void main(String[] args) {
        // System.setProperty(SimpleLogger.DEFAULT_LOG_LEVEL_KEY, "DEBUG");
        Logger logger = LoggerFactory.getLogger(DemoExample.class);
        logger.info("Info Message");
        logger.error("Error Message");
        logger.warn("Warn Message");
        logger.debug("Debug Message");
        logger.trace("Trace Message");
    }
}

4，效果

D:\Java\jdk17\bin\java.exe "-javaagent:D:\JetBrains\IntelliJ IDEA Community Edition 2024.3.1.1\lib\idea_rt.jar=1190:D:\JetBrains\IntelliJ IDEA Community Edition 2024.3.1.1\bin" -Dfile.encoding=UTF-8 -classpath D:\test\LogLearn\out\production\LogLearn;D:\test\log-lib\slf4j-api-2.0.9.jar;D:\test\log-lib\logback-classic-1.5.9.jar;D:\test\log-lib\logback-core-1.5.9.jar demo.log.DemoExample
2025-01-04 09:07:41 [main] INFO  demo.log.DemoExample - Info Message
2025-01-04 09:07:41 [main] ERROR demo.log.DemoExample - Error Message
2025-01-04 09:07:41 [main] WARN  demo.log.DemoExample - Warn Message
2025-01-04 09:07:41 [main] DEBUG demo.log.DemoExample - Debug Message

Process finished with exit code 0