From 927e5a81395879c62259a763b81a5cac97eaef8f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=88=98=E6=B3=89=E4=BD=B3?= <1107186916@qq.com>
Date: Mon, 5 Oct 2026 16:17:00 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E9=87=91=E8=9D=B6PDF=E7=89=88=E5=BC=8F?=
 =?UTF-8?q?=E6=96=87=E4=BB=B6=E5=93=8D=E5=BA=94=E5=BC=BA=E5=88=B6applicati?=
 =?UTF-8?q?on/pdf=EF=BC=8C=E4=BF=AE=E5=A4=8D=E6=9F=A5=E7=9C=8B=E6=97=B6blo?=
 =?UTF-8?q?b=E4=B8=8D=E6=B8=B2=E6=9F=93=E9=80=80=E5=8C=96=E4=B8=BA?=
 =?UTF-8?q?=E9=9D=99=E9=BB=98=E4=B8=8B=E8=BD=BD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../transport/service/impl/InvoiceReceiptServiceImpl.java     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceReceiptServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceReceiptServiceImpl.java
index 96e9ed49..c4632d3f 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceReceiptServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceReceiptServiceImpl.java
@@ -1301,6 +1301,10 @@ public class InvoiceReceiptServiceImpl extends BaseServiceImpl<InvoiceReceiptMap
 				throw new ServiceException("调用BFI文件下载失败：" + readBfiJsonMessage(bfiResponse));
 			}
 			String fileName = Func.isBlank(item.name()) ? invoiceNo + ".pdf" : item.name();
+			// BFI 文件流统一回 octet-stream：PDF 版式须显式声明 MIME，否则浏览器 blob 不渲染、查看退化为静默下载
+			if (fileName.endsWith(".pdf") && (Func.isBlank(contentType) || contentType.contains("octet-stream"))) {
+				contentType = "application/pdf";
+			}
 			// 文件名按 RFC 5987 编码（+ 号转 %20），中文/特殊字符不乱码
 			String encodedName = URLEncoder.encode(fileName, StandardCharsets.UTF_8).replace("+", "%20");
 			response.setContentType(Func.isBlank(contentType) ? "application/pdf" : contentType);