瀚银上传文件被截断问题排查

src/main/java/au/com/royalpay/payment/manage/system/core/beans/TradeSecureFile.java

@@ -79,6 +79,7 @@ public class TradeSecureFile {
             writer.println(headerLine());
             for (TradeItem item : tradeItems) {
                 writer.println(item.line());
+                writer.flush();
             }
             content = bos.toByteArray();
             return content;