diff --git a/src/main/java/com/glxp/api/controller/purchase/SupCertController.java b/src/main/java/com/glxp/api/controller/purchase/SupCertController.java
index d43b779b..f6647c24 100644
--- a/src/main/java/com/glxp/api/controller/purchase/SupCertController.java
+++ b/src/main/java/com/glxp/api/controller/purchase/SupCertController.java
@@ -325,8 +325,8 @@ public class SupCertController {
                 supData.put("index", String.valueOf(i));
                 supData.put("name", obj.getName() == null ? ' ' : obj.getName());
                 supData.put("code", obj.getCode() == null ? ' ' : obj.getCode());
-                supData.put("vaiDate", formatter.format(obj.getVailDate()));
-                supData.put("expireDate", formatter.format(obj.getExpireDate()));
+                supData.put("vaiDate", obj.getVailDate() == null ? ' ' : formatter.format(obj.getVailDate()));
+                supData.put("expireDate", obj.getExpireDate() == null ? ' ' : formatter.format(obj.getExpireDate()));
                 supData.put("status", obj.getStatus() == 0 ? "有效" : "失效");
                 supData.put("auditStatus", getAuditStatus(obj.getAuditStatus()));
                 supData.put("remark", obj.getRemark() == null ? ' ' : obj.getRemark());