diff --git a/app.py b/app.py
index ad91edd..0b5d535 100644
--- a/app.py
+++ b/app.py
@@ -224,14 +224,17 @@ def create_certificate(ca_id, common_name, san_dns, san_ip, organization, organi
         csr_config += "\nreq_extensions = req_ext\n[req_ext]\nsubjectAltName = @alt_names\n[alt_names]\n"
 
         if san_dns:
-            dns_entries = san_dns.split(',')
+            dns_entries = [dns.strip() for dns in san_dns.split(',') if dns.strip()]
             for i, dns in enumerate(dns_entries, 1):
-                csr_config += f"DNS.{i} = {dns.strip()}\n"
+                csr_config += f"DNS.{i} = {dns}\n"
 
+        # 添加IP SAN条目
         if san_ip:
-            ip_entries = san_ip.split(',')
+            ip_entries = [ip.strip() for ip in san_ip.split(',') if ip.strip()]
             for i, ip in enumerate(ip_entries, 1):
-                csr_config += f"IP.{i} = {ip.strip()}\n"
+                csr_config += f"IP.{i} = {ip}\n
+    # 确保配置文件不以空行结尾
+    csr_config = csr_config.strip()
 
     config_path = os.path.join(cert_dir, 'csr_config.cnf')
     with open(config_path, 'w') as f: