From 89d481da523eaf8553fde9cf67b61713adc3322e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E9=B8=BF=E8=BE=BE?= <hongda.li.dlmu@qq.com>
Date: Thu, 28 Apr 2022 15:58:02 +0800
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---
 .../java/cn/hutool/core/lang/Singleton.java   | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/hutool-core/src/main/java/cn/hutool/core/lang/Singleton.java b/hutool-core/src/main/java/cn/hutool/core/lang/Singleton.java
index a4f210100..ba49e1e99 100755
--- a/hutool-core/src/main/java/cn/hutool/core/lang/Singleton.java
+++ b/hutool-core/src/main/java/cn/hutool/core/lang/Singleton.java
@@ -6,7 +6,11 @@ import cn.hutool.core.util.ClassUtil;
 import cn.hutool.core.util.ReflectUtil;
 import cn.hutool.core.util.StrUtil;
 
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Collectors;
 
 /**
  * 单例类<br>
@@ -90,6 +94,30 @@ public final class Singleton {
 		POOL.put(key, obj);
 	}
 
+	/**
+	 * 判断某个类的对象是否存在
+	 *
+	 * @param clazz 类
+	 * @param params 构造参数
+	 * @return 是否存在
+	 */
+	public static boolean exists(Class<?> clazz, Object... params){
+		if (null != clazz){
+			final String key = buildKey(clazz.getName(), params);
+			return POOL.containsKey(key);
+		}
+		return false;
+	}
+
+	/**
+	 * 获取单例池中存在的所有类
+	 *
+	 * @return 非重复的类集合
+	 */
+	public static Set<Class<?>> getExistClass(){
+		return POOL.values().stream().map(Object::getClass).collect(Collectors.toSet());
+	}
+
 	/**
 	 * 移除指定Singleton对象
 	 *