diff --git a/src/main/java/org/redkale/util/AnyValue.java b/src/main/java/org/redkale/util/AnyValue.java
index 82f1c7c1c..7efa5beda 100644
--- a/src/main/java/org/redkale/util/AnyValue.java
+++ b/src/main/java/org/redkale/util/AnyValue.java
@@ -1164,4 +1164,8 @@ public abstract class AnyValue {
         sb.append('}');
         return sb.toString();
     }
+
+    public Properties toProperties() {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
 }
diff --git a/src/main/java/org/redkale/util/YmlProvider.java b/src/main/java/org/redkale/util/YmlProvider.java
index 1154a871e..30da81690 100644
--- a/src/main/java/org/redkale/util/YmlProvider.java
+++ b/src/main/java/org/redkale/util/YmlProvider.java
@@ -14,12 +14,9 @@ package org.redkale.util;
  */
 public interface YmlProvider {
 
-    public static final YmlProvider NIL = c -> {
-        throw new UnsupportedOperationException("Not supported yet.");
-    };
-
     /**
      * 将yml内容转换成AnyValue
+     * 
      * @param content yml内容
      * @return  AnyValue
      */
diff --git a/src/main/java/org/redkale/util/YmlReader.java b/src/main/java/org/redkale/util/YmlReader.java
index e1d141b3e..7fd6de23b 100644
--- a/src/main/java/org/redkale/util/YmlReader.java
+++ b/src/main/java/org/redkale/util/YmlReader.java
@@ -31,11 +31,7 @@ public class YmlReader {
     }
 
     public AnyValue read() {
-        YmlProvider provider = loadProvider();
-        if (provider == YmlProvider.NIL) {
-            throw new UnsupportedOperationException("Not supported yml.");
-        }
-        return provider.read(text);
+        return loadProvider().read(text);
     }
 
     /**
@@ -60,8 +56,16 @@ public class YmlReader {
                 currentProvider = provider;
                 return provider;
             }
-            currentProvider = YmlProvider.NIL;
+            currentProvider = new DefaultYmlProvider();
         }
         return currentProvider;
     }
+
+    protected static class DefaultYmlProvider implements YmlProvider {
+
+        @Override
+        public AnyValue read(String content) {
+            throw new UnsupportedOperationException("Not supported yml.");
+        }
+    }
 }