Update OssController.java

mall-admin/src/main/java/com/macro/mall/controller/OssController.java

@@ -5,12 +5,13 @@ import com.macro.mall.common.api.CommonResult;
 import com.macro.mall.dto.OssCallbackResult;
 import com.macro.mall.dto.OssPolicyResult;
 import com.macro.mall.service.OssService;
-import com.macro.mall.service.impl.OssServiceImpl;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.*;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.ResponseBody;
 
 import javax.servlet.http.HttpServletRequest;