日志系统log4j

依赖

 		<!-- slf4j 规范定义和桥架 -->

        <dependency>

            <groupId>org.slf4j</groupId>

            <artifactId>jcl-over-slf4j</artifactId>

            <version>1.7.25</version>

        </dependency>

            
        <!-- log4j2 实现 -->

        <dependency>

            <groupId>org.apache.logging.log4j</groupId>

            <artifactId>log4j-slf4j-impl</artifactId>

            <version>2.11.1</version>

            <scope>test</scope>

        </dependency>

log4j.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!--设置log4j2的自身log级别为warn-->
<configuration status="warn">

   <!-- 自定义变量 -->
   <Properties>
		<Property name="filedir">logs</Property>
	</Properties>


    <appenders>
        <console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
        </console>

        <RollingFile name="RollingFileInfo" fileName="${filedir}/info.log"
                     filePattern="${filedir}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log.gz">
              <!-- 过滤规则-->
            <Filters>
                <ThresholdFilter level="INFO"/>
                <!-- 更高级别的忽略 -->
                <ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
              <!-- 日志策略-->
            <Policies>
             <!-- 每天生成一个日志文件 --> 
             <TimeBasedTriggeringPolicy interval="1" modulate="true" />
            <!-- 限制单个文件大小 -->  
             <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
             <!-- 最大保存文件数 -->  
            <DefaultRolloverStrategy max="60" /> 
        </RollingFile>

        <RollingFile name="RollingFileWarn" fileName="${filedir}/warn.log"
                     filePattern="${filedir}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log.gz">
            <Filters>
                <ThresholdFilter level="WARN"/>
                <ThresholdFilter level="ERROR" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
        </RollingFile>

        <RollingFile name="RollingFileError" fileName="${filedir}/error.log"
                     filePattern="${filedir}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log.gz">
            <ThresholdFilter level="ERROR"/>
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
        </RollingFile>

    </appenders>

    <loggers>
        <root level="info">
            <appender-ref ref="Console"/>
            <appender-ref ref="RollingFileInfo"/>
            <appender-ref ref="RollingFileWarn"/>
            <appender-ref ref="RollingFileError"/>
        </root>
    </loggers>

</configuration>

log4j测试

public class Log4JTest {
	
	private static final Logger logger = LoggerFactory.getLogger(Log4JTest.class);
	
	public static void main(String[] args) {
		while(true) {
			try {
				Thread.sleep(3000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		logger.debug("debug");
		logger.info("info");
		logger.warn("warn");
		logger.error("error");
		}
	}

}