diff --git a/lab-37/lab-37-logging-logback/src/main/java/cn/iocoder/springboot/lab37/loggingdemo/Application.java b/lab-37/lab-37-logging-logback/src/main/java/cn/iocoder/springboot/lab37/loggingdemo/Application.java
index 1c59840b..ade8439b 100644
--- a/lab-37/lab-37-logging-logback/src/main/java/cn/iocoder/springboot/lab37/loggingdemo/Application.java
+++ b/lab-37/lab-37-logging-logback/src/main/java/cn/iocoder/springboot/lab37/loggingdemo/Application.java
@@ -1,13 +1,20 @@
 package cn.iocoder.springboot.lab37.loggingdemo;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
 public class Application {
 
+    private static Logger logger = LoggerFactory.getLogger(Application.class);
+
     public static void main(String[] args) {
         SpringApplication.run(Application.class, args);
+
+        // 打印日志
+        logger.debug("just do it");
     }
 
 }
diff --git a/lab-37/lab-37-logging-logback/src/main/java/cn/iocoder/springboot/lab37/loggingdemo/controller/DemoController.java b/lab-37/lab-37-logging-logback/src/main/java/cn/iocoder/springboot/lab37/loggingdemo/controller/DemoController.java
deleted file mode 100644
index f30038c7..00000000
--- a/lab-37/lab-37-logging-logback/src/main/java/cn/iocoder/springboot/lab37/loggingdemo/controller/DemoController.java
+++ /dev/null
@@ -1,30 +0,0 @@
-package cn.iocoder.springboot.lab37.loggingdemo.controller;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-@RequestMapping("/demo")
-public class DemoController {
-
-    private Logger logger = LoggerFactory.getLogger(getClass());
-
-    @GetMapping("/debug")
-    public void debug() {
-        logger.debug("debug");
-    }
-
-    @GetMapping("/info")
-    public void info() {
-        logger.info("info");
-    }
-
-    @GetMapping("/error")
-    public void error() {
-        logger.error("error");
-    }
-
-}
diff --git a/lab-37/lab-37-logging-logback/src/main/resources/logback-spring.xml b/lab-37/lab-37-logging-logback/src/main/resources/logback-spring.xml
index 9ea39f2d..67cdc717 100644
--- a/lab-37/lab-37-logging-logback/src/main/resources/logback-spring.xml
+++ b/lab-37/lab-37-logging-logback/src/main/resources/logback-spring.xml
@@ -1,35 +1,57 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
 <configuration>
 
+    <!-- 引入 Spring Boot 默认的 logback XML 配置文件  -->
     <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
 
-    <springProperty scope="context" name="applicationName" source="spring.application.name"/>
-
-    <property name="LOG_FILE" value="/Users/yunai/logs/${applicationName}.log"/>​
-
+    <!-- 控制台 Appender -->
     <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
+        <!-- 日志的格式化 -->
         <encoder>
             <pattern>${CONSOLE_LOG_PATTERN}</pattern>
             <charset>utf8</charset>
         </encoder>
     </appender>
 
+    <!-- 从 Spring Boot 配置文件中，读取 spring.application.name 应用名 -->
+    <springProperty name="applicationName" scope="context" source="spring.application.name" />
+    <!-- 日志文件的路径 -->
+    <property name="LOG_FILE" value="/Users/yunai/logs/${applicationName}.log"/>​
+    <!-- 日志文件 Appender -->
     <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
         <file>${LOG_FILE}</file>
+        <!--滚动策略，基于时间 + 大小的分包策略 -->
         <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
             <fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.%i.gz</fileNamePattern>
             <maxHistory>7</maxHistory>
             <maxFileSize>10MB</maxFileSize>
         </rollingPolicy>
+        <!-- 日志的格式化 -->
         <encoder>
             <pattern>${FILE_LOG_PATTERN}</pattern>
             <charset>utf8</charset>
         </encoder>
     </appender>
 
-    <root level="INFO">
-        <appender-ref ref="console"/>
-        <appender-ref ref="file"/>
-    </root>
+    <!-- 测试环境，独有的配置 -->
+    <springProfile name="dev">
+        <!-- 设置 Appender -->
+        <root level="INFO">
+            <appender-ref ref="console"/>
+        </root>
+
+        <!-- 设置 "cn.iocoder.springboot.lab37.loggingdemo" 的 Logger 的日志级别为 DEBUG -->
+        <logger name="cn.iocoder.springboot.lab37.loggingdemo" level="DEBUG"/>
+    </springProfile>
+
+    <!-- 生产环境，独有的配置 -->
+    <springProfile name="prod">
+        <!-- 设置 Appender -->
+        <root level="INFO">
+            <appender-ref ref="console"/>
+            <appender-ref ref="file"/>
+        </root>
+    </springProfile>
 
 </configuration>