Simple implementation of slf4j

First of all ： Profile location , name ;

second ： The configuration file Content ：

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <!-- Define the storage address of the log file   Stay away  LogBack  The relative path is used in the configuration of -->
    <property name="LOG_HOME" value="d:/log" />
    <!--  Console output  -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!--  Log output code  -->
      <!--  <Encoding>UTF-8</Encoding>-->
        <layout class="ch.qos.logback.classic.PatternLayout">
            <!-- Format output ：%d Indicates the date ,%thread Represents the thread name ,%-5level： The level is shown from the left 5 Character width %msg： Log message ,%n Is a newline -->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SS} [%thread] %-5level %logger{50} - %msg%n
            </pattern>
        </layout>
    </appender>
    <!--  Generate log files per day  -->
    <appender name="FILE"  class="ch.qos.logback.core.rolling.RollingFileAppender">
      <!--  <Encoding>UTF-8</Encoding>-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- The filename of the log file output -->
            <FileNamePattern>${LOG_HOME}/myApp.log.%d{yyyy-MM-dd}.log</FileNamePattern>
            <MaxHistory>30</MaxHistory>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <!-- Format output ：%d Indicates the date ,%thread Represents the thread name ,%-5level： The level is shown from the left 5 Character width %msg： Log message ,%n Is a newline -->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n
            </pattern>
        </layout>
        <!-- Maximum log file size -->
        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <MaxFileSize>10MB</MaxFileSize>
        </triggeringPolicy>
    </appender>

    <!--  Log output level  -->
    <root level="DEBUG">
        <appender-ref ref="STDOUT" />
        <appender-ref ref="FILE" />
    </root>

    <!-- Log asynchronously to database  -->
    <!--<appender name="DB" class="ch.qos.logback.classic.db.DBAppender">-->
    <!-- Log asynchronously to database  -->
    <!--   <connectionSource class="ch.qos.logback.core.db.DriverManagerConnectionSource"> -->
    <!-- Connection pool  -->
    <!--       <dataSource class="com.mchange.v2.c3p0.ComboPooledDataSource">
              <driverClass>com.mysql.jdbc.Driver</driverClass>
              <url>jdbc:mysql://127.0.0.1:3306/databaseName</url>
              <user>root</user>
              <password>root</password>
          </dataSource>
      </connectionSource>
  </appender>-->
</configuration>

application.yml

server:
  port: 8082

logging:
  config:
    classPath: logback.xml

Third ： application

package com.logtest.demo.action;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class LogAction {

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

    @GetMapping("/hello")
    public  void  hello(){
       // logger.trace("trace");
        logger.debug("debug");
        logger.info("info");
        logger.warn("warn");
        logger.error("error");
        logger.error(" I am mistaken ");
    }
}