目的

整合 slf4j 与 logback。

快速开始

maven 依赖

添加依赖包logback使用需要和slf4j一起使用，所以总共需要添加依赖的包有slf4j-api

logback使用需要和slf4j一起使用，所以总共需要添加依赖的包有slf4j-api.jar，logback-core.jar，logback-classic.jar，logback-access.jar这个暂时用不到所以不添加依赖了，maven配置

<properties>
　　<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
　　<logback.version>1.1.7</logback.version>
　　<slf4j.version>1.7.21</slf4j.version>
</properties>

<dependencies>
　　<dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>${slf4j.version}</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
        <version>${logback.version}</version>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>${logback.version}</version>
    </dependency>
</dependencies>

logback.xml 配置

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
    <!--定义日志文件的存储地址 勿在 LogBack 的配置中使用相对路径-->
    <property name="LOG_HOME" value="/home"/>
    <!-- 控制台输出 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
        </encoder>
    </appender>
    <!-- 按照每天生成日志文件 -->
    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--日志文件输出的文件名-->
            <FileNamePattern>${LOG_HOME}/TestWeb.log.%d{yyyy-MM-dd}.log</FileNamePattern>
            <!--日志文件保留天数-->
            <MaxHistory>30</MaxHistory>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
        </encoder>
        <!--日志文件最大的大小-->
        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <MaxFileSize>10MB</MaxFileSize>
        </triggeringPolicy>
    </appender>

    <!-- 日志输出级别 -->
    <root level="INFO">
        <appender-ref ref="STDOUT"/>
    </root>
</configuration>

或者一个更加简单的 logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
        </layout>
    </appender>

    <logger name="com.github.houbb.zk.learn" level="TRACE"/>

    <root level="debug">
        <appender-ref ref="STDOUT" />
    </root>

</configuration>

测试代码

package com.github.houbb.zk.learn;

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

public class LoggerTest {

    private static Logger logger = LoggerFactory.getLogger(LoggerTest.class);

    public static void main(String[] args) {
        logger.debug("debug：....");
        logger.info("info...");
        logger.error("error...");
    }

}

日志如下：

17:07:02,874 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy]
17:07:02,875 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
17:07:02,876 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/D:/code/zk-learn/target/classes/logback.xml]
17:07:03,164 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
17:07:03,202 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
17:07:03,219 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT]
17:07:03,378 |-WARN in ch.qos.logback.core.ConsoleAppender[STDOUT] - This appender no longer admits a layout as a sub-component, set an encoder instead.
17:07:03,378 |-WARN in ch.qos.logback.core.ConsoleAppender[STDOUT] - To ensure compatibility, wrapping your layout in LayoutWrappingEncoder.
17:07:03,378 |-WARN in ch.qos.logback.core.ConsoleAppender[STDOUT] - See also http://logback.qos.ch/codes.html#layoutInsteadOfEncoder for details
17:07:03,381 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.github.houbb.zk.learn] to TRACE
17:07:03,381 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to DEBUG
17:07:03,382 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STDOUT] to Logger[ROOT]
17:07:03,385 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
17:07:03,389 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@4ca8195f - Registering current configuration as safe fallback point

17:07:03.398 [main] DEBUG com.github.houbb.zk.learn.LoggerTest - debug：....
17:07:03.405 [main] INFO  com.github.houbb.zk.learn.LoggerTest - info...
17:07:03.406 [main] ERROR com.github.houbb.zk.learn.LoggerTest - error...

参考资料

logback的使用和logback.xml详解