较多改动，暂存

backend/pom.xml

@@ -146,7 +146,7 @@
             <dependency>
                 <groupId>com.alibaba.fastjson2</groupId>
                 <artifactId>fastjson2</artifactId>
-                <version>2.0.19</version>
+                <version>2.0.24</version>
             </dependency>
 
             <!-- jackson -->
@@ -221,6 +221,19 @@
                 <artifactId>spring-boot-devtools</artifactId>
                 <version>2.7.5</version>
             </dependency>
+
+            <!--腾讯云临时密钥-->
+            <dependency>
+                <groupId>com.qcloud</groupId>
+                <artifactId>cos-sts_api</artifactId>
+                <version>3.1.0</version>
+            </dependency>
+            <!-- 腾讯云对象存储 -->
+            <dependency>
+                <groupId>com.qcloud</groupId>
+                <artifactId>cos_api</artifactId>
+                <version>5.6.97</version>
+            </dependency>
         </dependencies>
     </dependencyManagement>