diff --git a/policeSecurityServer/src/main/java/com/changhu/support/fastjson2/serializer/MinioPrefixSerializer.java b/policeSecurityServer/src/main/java/com/changhu/support/fastjson2/serializer/MinioPrefixSerializer.java
index 1e6a48b..7dd293d 100644
--- a/policeSecurityServer/src/main/java/com/changhu/support/fastjson2/serializer/MinioPrefixSerializer.java
+++ b/policeSecurityServer/src/main/java/com/changhu/support/fastjson2/serializer/MinioPrefixSerializer.java
@@ -25,7 +25,8 @@ public class MinioPrefixSerializer implements ObjectWriter<String> {
     public void write(JSONWriter jsonWriter, Object object, Object fieldName, Type fieldType, long features) {
         if (object instanceof String path && StrUtil.isNotEmpty(path)) {
             jsonWriter.writeString(minioPrefix + object);
+        } else {
+            jsonWriter.writeString("");
         }
-        jsonWriter.writeString("");
     }
 }