logback配置(与log4j对比)

使用logback理由：

1、性能提升

2、自动重新加载配置文件

3、自动去除旧的日志文件 (TimeBasedRollingPolicy)

配置：

1、pom.xml添加依赖(logback-core-1.1.2.jar)

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.0.6</version>
</dependency>

百度网盘：https://pan.baidu.com/s/19VGCaI9fTm5k0PR5kUWa5Q

密码：eld7

2、配置文件

说明：

<?xml version="1.0" encoding="UTF-8"?>
<configuration
    xmlns="http://ch.qos.logback/xml/ns/logback"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://ch.qos.logback/xml/ns/logback https://raw.githubusercontent.com/enricopulatzo/logback-XSD/master/src/main/xsd/logback.xsd">
    <property name="LOG_HOME" value="tp/log"/>
    <!-- 输出到控制台 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender" >
        <!-- 输出的格式 -->
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50}:  %msg%n</pattern>
        </encoder>
    </appender>

    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 配置滚动的策略 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 日志名称的格式 -->
            <fileNamePattern>${LOG_HOME}/logback.log.%d{yyyy-MM-dd}</fileNamePattern>
            <!-- 保存的最长时间：天数 -->
            <MaxHistory>1</MaxHistory>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50}:  %msg%n</pattern>
        </encoder>
    </appender>

    <!--
    注意：
    level属性也可以直接写在logger上，如：
    <logger name="ws.log.logback.LogbackTest" additivity="false" level="INFO">
        <appender-ref ref="STDOUT" />
    </logger>
    -->
    <logger name="ws.log.logback.LogbackTest" additivity="false">
        <level value="INFO" />
        <appender-ref ref="STDOUT" />
    </logger>

    <!-- 相当于logger元素，只是name值已经确定为root了 -->
    <root level="warn">
        <appender-ref ref="STDOUT" />
    </root>
</configuration>

实际配置：

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="30 seconds">
    <!-- <property name="position.log.dir" value="../logs" /> -->
    <property name="position.log.dir" value="D:/logs/0817" />
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>[%d{yyyy-MM-dd HH:mm:ss}][%-5level][%logger:%L] %m%n
            </pattern>
        </encoder>
    </appender> <!---->
    <!-- weather项目日志 -->
    <appender name="position_appender"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>${position.log.dir}/position.log</File>
        <encoder>
            <pattern>[%d{yyyy-MM-dd HH:mm:ss}][%-5level][%logger:%L][%X{cguid}]
                %m%n</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${position.log.dir}/position.log.%d{yyyy-MM-dd}
            </fileNamePattern>
        </rollingPolicy>
    </appender>
    <!-- 性能监控 -->
    <appender name="Performance_Monitoring"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>${position.log.dir}/monitoring.log</File>
        <encoder>
            <pattern>%m%n</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${position.log.dir}/monitoring.log.%d{yyyy-MM-dd}
            </fileNamePattern>
        </rollingPolicy>
    </appender>

    <logger name="richinfo.frame" level="DEBUG" additivity="false">
        <appender-ref ref="CONSOLE" />
    </logger>
    <logger name="com.richinfo" level="DEBUG" additivity="false">
        <appender-ref ref="CONSOLE" />
    </logger>
    <logger name="Performance_monitoring" level="DEBUG" additivity="false">
        <appender-ref ref="Performance_Monitoring" />
    </logger>
 

    <!-- <root level="debug">
        <appender-ref ref="CONSOLE" />
    </root> -->
</configuration>

3、代码实现

public class LogbackTest {

    private static final Logger LOGGER = LoggerFactory.getLogger(LogbackTest.class);

    public static void main(String[] args) {
        LOGGER.trace("logback的--trace日志--输出了");
        LOGGER.debug("logback的--debug日志--输出了");
        LOGGER.info("logback的--info日志--输出了");
        LOGGER.warn("logback的--warn日志--输出了");
        LOGGER.error("logback的--error日志--输出了");
    }

}

自动重新加载配置文件