没事也来配一个logback

工程下载：https://files.cnblogs.com/files/xiandedanteng/logbackCfg20200115.zip

首先创建一个maven项目，pom.xml如下书写：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com</groupId>
  <artifactId>logbackCfg</artifactId>
  <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.1.11</version>
        </dependency>
        
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.1.11</version>
        </dependency>
    </dependencies>
</project>

注意上面的dependency是在我本地库既存的logback库，请你也参照自己本地库设置（查看方法：Preference->Maven->User settings->Local Respository），如果没有请在网上寻找官网通用配置。

其次，在src/main/resource放入logback.xml,内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
    <!-- Where are log files -->
    <property name="LOG_HOME" value="d:/logs" />
    
    <!-- Output to Console -->
    <appender name="STDOUT"
        class="ch.qos.logback.core.ConsoleAppender">
        <encoder
            class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--%d:date，%thread:thread，%-5level：error/debug/info... %msg：message，%n:new line -->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} -%msg%n</pattern>
        </encoder>
    </appender>
    
    <!-- Output to File -->
    <appender name="FILE"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy
            class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--log file pathname -->
            <FileNamePattern>${LOG_HOME}/logbackCfg.log.%d{yyyy-MM-dd}.log
            </FileNamePattern>
            <!--days log files will be kept -->
            <MaxHistory>30</MaxHistory>
        </rollingPolicy>
        <encoder
            class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--%d:date，%thread:thread，%-5level：error/debug/info... %msg：message，%n:new line -->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} -%msg%n</pattern>
        </encoder>
        <!--size -->
        <triggeringPolicy
            class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <MaxFileSize>10MB</MaxFileSize>
        </triggeringPolicy>
    </appender>

    <!-- log level TRACE, DEBUG, INFO, WARN, ERROR, ALL and OFF,default：DEBUG。-->
    <root level="ALL">
        <appender-ref ref="STDOUT" /> <!-- show log on console -->
        <appender-ref ref="FILE" /> <!-- show log in file -->
    </root>
</configuration>

其三，写代码测试：

package logbackCfg;

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

public class App {
    private final static Logger logger = LoggerFactory.getLogger(App.class);

    public static void main(String[] args) {
        logger.info("秦时明月汉时关");
        logger.error("万里长征人未还");
        logger.debug("但使龙城飞将在");
        logger.trace("不教胡马度阴山");
    }
}

控制台输出：

2020-01-15 15:45:48.409 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-15 15:45:48.412 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-15 15:45:48.413 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-15 15:45:48.413 [main] TRACE logbackCfg.App -不教胡马度阴山

文件输出：

2020-01-15 15:44:12.310 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-15 15:44:12.313 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-15 15:44:12.313 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-15 15:44:42.366 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-15 15:44:42.368 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-15 15:44:42.369 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-15 15:44:42.369 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-15 15:45:48.409 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-15 15:45:48.412 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-15 15:45:48.413 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-15 15:45:48.413 [main] TRACE logbackCfg.App -不教胡马度阴山

参考：

https://www.cnblogs.com/warking/p/5710303.html