新增标注导出和JSON数据集导入

README.md

@@ -40,3 +40,19 @@ export APP_COS_PUBLIC_BASE_URL=''
 - `POST /api/cos/objects` accepts multipart file upload and stores the file through the backend.
 
 Both endpoints return the standard `ApiResponse<T>` shape.
+
+## Replace The Annotation Dataset
+
+The import runner accepts only `solidworks.rebuild_extract.v1` JSON files. It clears existing
+models, histories, annotations, structures, functions, and their relations before importing the
+new dataset. It is disabled by default and should run as a non-web process:
+
+```bash
+APP_JSON_DATASET_IMPORT_ENABLED=true \
+APP_JSON_DATASET_IMPORT_SOURCE_DIRECTORY='/absolute/path/to/output_json 2' \
+APP_JSON_DATASET_IMPORT_CATEGORY_ID=1 \
+mvn spring-boot:run -Dspring-boot.run.arguments=--spring.main.web-application-type=none
+```
+
+The source files contain feature trees only. The importer creates annotation histories but does
+not fabricate STEP, GLB, or topology assets.