diff --git a/pom.xml b/pom.xml
index 52d1cea..a0963d6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,6 +28,14 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-aop</artifactId>
         </dependency>
+
+        <!-- freemarker jar -->
+        <dependency>
+            <groupId>org.freemarker</groupId>
+            <artifactId>freemarker</artifactId>
+            <version>2.3.28</version>
+        </dependency>
+
         <dependency>
             <groupId>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
@@ -39,31 +47,7 @@
             <artifactId>mybatis-plus-boot-starter</artifactId>
             <version>3.5.2</version>
         </dependency>
-        <!-- redis -->
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-data-redis</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.session</groupId>
-            <artifactId>spring-session-data-redis</artifactId>
-        </dependency>
-        <!-- elasticsearch-->
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
-        </dependency>
-        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-        </dependency>
-        <!-- https://hutool.cn/docs/index.html#/-->
-        <dependency>
-            <groupId>cn.hutool</groupId>
-            <artifactId>hutool-all</artifactId>
-            <version>5.8.8</version>
-        </dependency>
+
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
diff --git a/src/main/java/com/teaching/backend/MainApplication.java b/src/main/java/com/teaching/backend/MainApplication.java
deleted file mode 100644
index 293b98a..0000000
--- a/src/main/java/com/teaching/backend/MainApplication.java
+++ /dev/null
@@ -1,21 +0,0 @@
-package com.teaching.backend;
-
-import org.mybatis.spring.annotation.MapperScan;
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
-
-/**
- * 主类（项目启动入口）
- *
- */
-// todo 如需开启 Redis，须移除 exclude 中的内容
-@SpringBootApplication(exclude = {RedisAutoConfiguration.class})
-@MapperScan("com.teaching.backend.mapper")
-public class MainApplication {
-
-    public static void main(String[] args) {
-        SpringApplication.run(MainApplication.class, args);
-    }
-
-}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index de8b6b9..7f1e8c0 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -1,5 +1,5 @@
 server:
-  port: 8081
+  port: 8080
 spring:
   application:
     name: teaching-backend
@@ -11,4 +11,6 @@ spring:
     url: jdbc:mysql://localhost:3306/teaching_db
     username: root
     password: root
-
+mybatis:
+  configuration:
+    map-underscore-to-camel-case: true
\ No newline at end of file