一. 首先你需要对LogBack进行配置，配置文件放入resources中

• 需要注意配置文件的名字不要随意修改
  
• logback-spring.xml:

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

	 <appender name="consoleApp" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>
                %date{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%thread]%logger{56}.%method:%L -%msg%n
            </pattern>
        </layout>
    </appender>

    <appender name="fileInfoApp" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
             <level>ERROR</level>
            <onMatch>DENY</onMatch>
            <onMismatch>ACCEPT</onMismatch>
        </filter>
        <encoder>
            <pattern>
                %date{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%thread]%logger{56}.%method:%L -%msg%n
            </pattern>
        </encoder>
        <!-- 滚动策略 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 路径 -->
            <fileNamePattern>app_log/log/app.info.%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>

    <appender name="fileErrorApp" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
        <encoder>
            <pattern>
                %date{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%thread]%logger{56}.%method:%L -%msg%n
            </pattern>
        </encoder>
        
        <!-- 设置滚动策略 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 日志信息输出路径 -->
            <fileNamePattern>app_log/log/app.err.%d.log</fileNamePattern>
            
            <!-- 控制保留的归档文件的最大数量，超出数量就删除旧文件，假设设置每个月滚动，
            且<maxHistory> 是1，则只保存最近1个月的文件，删除之前的旧文件 -->
             <MaxHistory>1</MaxHistory>
            
        </rollingPolicy>
    </appender>
    <!-- 日志级别为info -->
   <root level="INFO">  
        <appender-ref ref="consoleApp"/>
        <appender-ref ref="fileInfoApp"/>
        <appender-ref ref="fileErrorApp"/>
    </root>
</configuration>

• 日志的controller：

package cn.hp.springboot_day05.controller;

import cn.hp.springboot_day05.utils.JsonData;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/log")
public class LogController {

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

    @RequestMapping("/test")
    public Object test(){
        logger.error("error 级别日志");
        logger.info("info 级别日志");
        logger.debug("debug 级别日志");
        logger.warn("warn 级别日志");
        return JsonData.buildSuccess();
    }
}

二. 效果

• 控制台：
  
• 日志的输出路径：
  
• 日志信息：