修复代码

pom.xml

@@ -38,6 +38,10 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-mail</artifactId>
+        </dependency>
 
         <dependency>
             <groupId>com.alibaba</groupId>