From 4eb720bb31f1bc435bc09954441a77f4082810c4 Mon Sep 17 00:00:00 2001
From: zhangrenhua <zrh@dameng.com>
Date: Fri, 22 Jul 2022 09:04:33 +0800
Subject: [PATCH] =?UTF-8?q?json=E5=BA=8F=E5=88=97=E5=8C=96=E6=97=B6?=
 =?UTF-8?q?=EF=BC=8C=E5=A2=9E=E5=8A=A0=E5=85=81=E8=AE=B8=E5=A4=9A=E4=B8=AA?=
 =?UTF-8?q?=E7=9B=B8=E5=90=8C=E7=9A=84key=E9=85=8D=E7=BD=AE?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/cn/hutool/json/JSONConfig.java  | 23 +++++++++++++++++++
 .../main/java/cn/hutool/json/JSONObject.java  |  4 +++-
 .../java/cn/hutool/json/JSONUtilTest.java     | 10 ++++++++
 3 files changed, 36 insertions(+), 1 deletion(-)

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 0b437a8f3..95b1039bf 100755
--- a/hutool-json/src/main/java/cn/hutool/json/JSONConfig.java
+++ b/hutool-json/src/main/java/cn/hutool/json/JSONConfig.java
@@ -44,6 +44,11 @@ public class JSONConfig implements Serializable {
 	 */
 	private boolean stripTrailingZeros = true;
 
+	/**
+	 * 是否忽略多个相同的key
+	 */
+	private boolean ignoreDuplicateKey = false;
+
 	/**
 	 * 创建默认的配置项
 	 *
@@ -235,4 +240,22 @@ public class JSONConfig implements Serializable {
 		this.stripTrailingZeros = stripTrailingZeros;
 		return this;
 	}
+
+	/**
+	 * 是否忽略多个相同的key
+	 * @return
+	 */
+	public boolean isIgnoreDuplicateKey() {
+		return ignoreDuplicateKey;
+	}
+
+	/**
+	 * 是否忽略多个相同的key
+	 * @param ignoreDuplicateKey
+	 * @return
+	 */
+	public JSONConfig setIgnoreDuplicateKey(boolean ignoreDuplicateKey) {
+		this.ignoreDuplicateKey = ignoreDuplicateKey;
+		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 921d19df8..1704c8daa 100755
--- a/hutool-json/src/main/java/cn/hutool/json/JSONObject.java
+++ b/hutool-json/src/main/java/cn/hutool/json/JSONObject.java
@@ -392,7 +392,9 @@ public class JSONObject extends MapWrapper<String, Object> implements JSON, JSON
 			// 忽略值模式下如果值为空清除key
 			this.remove(key);
 		} else {
-			if (checkDuplicate && containsKey(key)) {
+			/*如果允许多个key，就不抛出异常，使用后面的值覆盖前面的值*/
+			boolean ignoreDuplicateKey = this.config.isIgnoreDuplicateKey();
+			if (checkDuplicate && containsKey(key) && false == ignoreDuplicateKey) {
 				throw new JSONException("Duplicate key \"{}\"", key);
 			}
 
diff --git a/hutool-json/src/test/java/cn/hutool/json/JSONUtilTest.java b/hutool-json/src/test/java/cn/hutool/json/JSONUtilTest.java
index 3be9a3fbb..5f2e8bb41 100644
--- a/hutool-json/src/test/java/cn/hutool/json/JSONUtilTest.java
+++ b/hutool-json/src/test/java/cn/hutool/json/JSONUtilTest.java
@@ -234,4 +234,14 @@ public class JSONUtilTest {
 		final String xmlStr = JSONUtil.toXmlStr(obj);
 		Assert.assertEquals("<key1>v1</key1><key2>a</key2><key2>b</key2><key2>c</key2>", xmlStr);
 	}
+
+	@Test
+	public void testDuplicateKey(){
+		String str = "{id:123, name:\"张三\", name:\"李四\"}";
+
+		JSONObject jsonObject = JSONUtil.parseObj(str, JSONConfig.create().setIgnoreDuplicateKey(true));
+		System.out.println(jsonObject.toString());
+
+		Assert.assertNotNull(jsonObject);
+	}
 }