管理员上传文件到存储桶功能基本完成；可以前端计算文件SHA1；添加腾讯云生成SecretId、SecretKey文档

bookshelfplus/src/main/java/plus/bookshelf/App.java

@@ -1,18 +1,11 @@
 package plus.bookshelf;
 
-import com.qcloud.cos.http.HttpMethodName;
 import org.mybatis.spring.annotation.MapperScan;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
-import plus.bookshelf.Common.FileManager.QCloudCosUtils;
-import plus.bookshelf.Config.QCloudCosConfig;
 
-/**
- * Hello world!
- */
 @SpringBootApplication(scanBasePackages = {"plus.bookshelf"})
 @RestController
 @MapperScan("plus.bookshelf.Dao.Mapper")
@@ -24,19 +17,12 @@ public class App {
 
         // 启动SpringBoot项目
         SpringApplication.run(App.class, args);
+
+        System.out.println("backend service started successfully.");
     }
 
     @RequestMapping("/")
     public String Home() {
-        return "首页";
-    }
-
-    @Autowired
-    QCloudCosConfig qCloudCosConfig;
-
-    @RequestMapping("/cos")
-    public String cos() {
-        QCloudCosUtils QCloudCosUtils = new QCloudCosUtils(qCloudCosConfig);
-        return QCloudCosUtils.getUrl("user-login-token", HttpMethodName.POST, "mydemo.jpg", 5);
+        return "backend service is running.";
     }
 }