文件类型抽取bug修复

ai-service/src/main/java/com/bw/ai/textextract/service/impl/TextExtractServiceImpl.java

@@ -63,9 +63,9 @@ public class TextExtractServiceImpl implements TextExtractService {
 	        	String fileName = UUID.randomUUID().toString() + "." + format;
 				String downloadFilePath = downloadFilePathPrefix + fileName;
 	        	DownLoadUtil.downloadFile(reference, downloadFilePath);
+	        	reference = FileUtil.readFile(downloadFilePath);
 	        	//删除文件
 	        	FileUtil.delFile(downloadFilePath);
-				reference = FileUtil.readFile(downloadFilePath);
 			}
 			//获取抽取子字段and prompt
 			List<Map<String, Object>> extractFields = (List<Map<String, Object>>) task.get(Constants.EXTRACT_FIELDS);