diff --git a/hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java b/hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java
index f0c448f90..52cf59582 100755
--- a/hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java
+++ b/hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java
@@ -218,11 +218,11 @@ public final class InternalJSONUtil {
 			JSONObject nextTarget = target.getJSONObject(segment);
 			if (nextTarget == null) {
 				nextTarget = new JSONObject(target.getConfig());
-				target.setOnce(segment, nextTarget, predicate);
+				target.set(segment, nextTarget, predicate);
 			}
 			target = nextTarget;
 		}
-		target.setOnce(path[last], value, predicate);
+		target.set(path[last], value, predicate);
 		return jsonObject;
 	}
 
@@ -318,7 +318,7 @@ public final class InternalJSONUtil {
 	public static Writer quote(final String str, final Writer writer, final boolean isWrap) throws IORuntimeException {
 		try {
 			return doQuote(str, writer, isWrap);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}
diff --git a/hutool-json/src/main/java/cn/hutool/json/JSONConfig.java b/hutool-json/src/main/java/cn/hutool/json/JSONConfig.java
index 811b63347..e6922a1da 100755
--- a/hutool-json/src/main/java/cn/hutool/json/JSONConfig.java
+++ b/hutool-json/src/main/java/cn/hutool/json/JSONConfig.java
@@ -43,6 +43,10 @@ public class JSONConfig implements Serializable {
 	 * 是否去除末尾多余0，例如如果为true,5.0返回5
 	 */
 	private boolean stripTrailingZeros = true;
+	/**
+	 * 是否检查重复key
+	 */
+	private boolean checkDuplicate;
 
 	/**
 	 * 创建默认的配置项
@@ -211,4 +215,26 @@ public class JSONConfig implements Serializable {
 		this.stripTrailingZeros = stripTrailingZeros;
 		return this;
 	}
+
+	/**
+	 * 是否检查多个相同的key
+	 *
+	 * @return 是否检查多个相同的key
+	 * @since 5.8.5
+	 */
+	public boolean isCheckDuplicate() {
+		return checkDuplicate;
+	}
+
+	/**
+	 * 是否检查多个相同的key
+	 *
+	 * @param checkDuplicate 是否检查多个相同的key
+	 * @return this
+	 * @since 5.8.5
+	 */
+	public JSONConfig setCheckDuplicate(boolean checkDuplicate) {
+		this.checkDuplicate = checkDuplicate;
+		return this;
+	}
 }
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 95a75a919..49ce8dcdb 100755
--- a/hutool-json/src/main/java/cn/hutool/json/JSONObject.java
+++ b/hutool-json/src/main/java/cn/hutool/json/JSONObject.java
@@ -198,7 +198,7 @@ public class JSONObject extends MapWrapper<String, Object> implements JSON, JSON
 	 */
 	@Override
 	public Object put(final String key, final Object value) throws JSONException {
-		return put(key, value, null, false);
+		return put(key, value, null, getConfig().isCheckDuplicate());
 	}
 
 	/**
@@ -210,7 +210,7 @@ public class JSONObject extends MapWrapper<String, Object> implements JSON, JSON
 	 * @throws JSONException 值是无穷数字抛出此异常
 	 */
 	public JSONObject set(final String key, final Object value) throws JSONException {
-		put(key, value, null, false);
+		set(key, value, null);
 		return this;
 	}
 
@@ -224,8 +224,8 @@ public class JSONObject extends MapWrapper<String, Object> implements JSON, JSON
 	 * @throws JSONException 值是无穷数字、键重复抛出异常
 	 * @since 5.8.0
 	 */
-	public JSONObject setOnce(final String key, final Object value, final Predicate<MutableEntry<String, Object>> predicate) throws JSONException {
-		put(key, value, predicate, true);
+	public JSONObject set(final String key, final Object value, final Predicate<MutableEntry<String, Object>> predicate) throws JSONException {
+		put(key, value, predicate, getConfig().isCheckDuplicate());
 		return this;
 	}
 
diff --git a/hutool-json/src/main/java/cn/hutool/json/JSONParser.java b/hutool-json/src/main/java/cn/hutool/json/JSONParser.java
index 6e5eff067..a82d126a1 100755
--- a/hutool-json/src/main/java/cn/hutool/json/JSONParser.java
+++ b/hutool-json/src/main/java/cn/hutool/json/JSONParser.java
@@ -74,7 +74,7 @@ public class JSONParser {
 				throw tokener.syntaxError("Expected a ':' after a key");
 			}
 
-			jsonObject.setOnce(key, tokener.nextValue(), predicate);
+			jsonObject.set(key, tokener.nextValue(), predicate);
 
 			// Pairs are separated by ','.