diff --git a/hutool-json/src/main/java/cn/hutool/json/JSONObject.java b/hutool-json/src/main/java/cn/hutool/json/JSONObject.java
index efc3db59d..18d4a9d08 100644
--- a/hutool-json/src/main/java/cn/hutool/json/JSONObject.java
+++ b/hutool-json/src/main/java/cn/hutool/json/JSONObject.java
@@ -25,6 +25,7 @@ import java.math.BigInteger;
 import java.util.Collection;
 import java.util.Enumeration;
 import java.util.LinkedHashMap;
+import java.util.TreeMap;
 import java.util.Map;
 import java.util.ResourceBundle;
 import java.util.Set;
@@ -157,7 +158,7 @@ public class JSONObject implements JSON, JSONGetter<String>, Map<String, Object>
 	 * @since 3.0.9
 	 */
 	public JSONObject(Object source, boolean ignoreNullValue) {
-		this(source, ignoreNullValue, (source instanceof LinkedHashMap));
+		this(source, ignoreNullValue, (source instanceof LinkedHashMap) || (source instanceof TreeMap));
 	}
 
 	/**