diff --git a/pom.xml b/pom.xml
index f3cf9b0..480df3b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -85,6 +85,12 @@
             <artifactId>lombok</artifactId>
             <version>1.16.20</version>
         </dependency>
+        <!-- https://mvnrepository.com/artifact/cn.hutool/hutool-all -->
+        <dependency>
+            <groupId>cn.hutool</groupId>
+            <artifactId>hutool-all</artifactId>
+            <version>4.6.4</version>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/main/java/com/hotlcc/wechat4j/Wechat.java b/src/main/java/com/hotlcc/wechat4j/Wechat.java
index 9bc9296..f17c462 100644
--- a/src/main/java/com/hotlcc/wechat4j/Wechat.java
+++ b/src/main/java/com/hotlcc/wechat4j/Wechat.java
@@ -1,12 +1,27 @@
 package com.hotlcc.wechat4j;
 
+import cn.hutool.core.thread.ThreadUtil;
 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
-import com.hotlcc.wechat4j.enums.*;
+import com.hotlcc.wechat4j.enums.ExitType;
+import com.hotlcc.wechat4j.enums.LoginTip;
+import com.hotlcc.wechat4j.enums.MediaType;
+import com.hotlcc.wechat4j.enums.MsgType;
+import com.hotlcc.wechat4j.enums.Retcode;
+import com.hotlcc.wechat4j.enums.Selector;
 import com.hotlcc.wechat4j.handler.ExitEventHandler;
 import com.hotlcc.wechat4j.handler.ReceivedMsgHandler;
-import com.hotlcc.wechat4j.model.*;
-import com.hotlcc.wechat4j.util.*;
+import com.hotlcc.wechat4j.model.BaseRequest;
+import com.hotlcc.wechat4j.model.MediaMessage;
+import com.hotlcc.wechat4j.model.ReceivedMsg;
+import com.hotlcc.wechat4j.model.UserInfo;
+import com.hotlcc.wechat4j.model.WxMessage;
+import com.hotlcc.wechat4j.util.FileUtil;
+import com.hotlcc.wechat4j.util.PropertiesUtil;
+import com.hotlcc.wechat4j.util.QRCodeUtil;
+import com.hotlcc.wechat4j.util.StringUtil;
+import com.hotlcc.wechat4j.util.WebWeixinApiUtil;
+import com.hotlcc.wechat4j.util.WechatUtil;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.http.HttpRequest;
 import org.apache.http.HttpRequestInterceptor;
@@ -265,7 +280,7 @@ public class Wechat {
                 pw.flush();
                 getWxUuid(pw, 0);
 
-                CommonUtil.threadSleep(2000);
+                ThreadUtil.sleep(2000);
                 continue;
             }
 
@@ -445,7 +460,7 @@ public class Wechat {
                 pw.println();
                 pw.flush();
 
-                CommonUtil.threadSleep(2000);
+                ThreadUtil.sleep(2000);
                 continue;
             }
 
@@ -693,7 +708,7 @@ public class Wechat {
                 //如果时间太短则阻塞2秒
                 long end = System.currentTimeMillis();
                 if (end - start < 2000) {
-                    CommonUtil.threadSleep(2000);
+                    ThreadUtil.sleep(2000);
                 }
             }
 
diff --git a/src/main/java/com/hotlcc/wechat4j/util/CommonUtil.java b/src/main/java/com/hotlcc/wechat4j/util/CommonUtil.java
deleted file mode 100644
index d58c961..0000000
--- a/src/main/java/com/hotlcc/wechat4j/util/CommonUtil.java
+++ /dev/null
@@ -1,41 +0,0 @@
-package com.hotlcc.wechat4j.util;
-
-import lombok.extern.slf4j.Slf4j;
-
-/**
- * 通用工具类
- *
- * @author Allen
- */
-@Slf4j
-public final class CommonUtil {
-    private CommonUtil() {
-    }
-
-    /**
-     * 睡眠线程
-     *
-     * @param millis 时间
-     * @param nanos  nanos
-     */
-    public static void threadSleep(long millis, int nanos) {
-        try {
-            Thread.sleep(millis, nanos);
-        } catch (InterruptedException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    /**
-     * 睡眠线程
-     *
-     * @param millis 时间
-     */
-    public static void threadSleep(long millis) {
-        try {
-            Thread.sleep(millis);
-        } catch (InterruptedException e) {
-            throw new RuntimeException(e);
-        }
-    }
-}
diff --git a/src/test/java/TestClass.java b/src/test/java/TestClass.java
index 7519ee3..92cbdec 100644
--- a/src/test/java/TestClass.java
+++ b/src/test/java/TestClass.java
@@ -1,9 +1,9 @@
+import cn.hutool.core.thread.ThreadUtil;
 import com.alibaba.fastjson.JSONObject;
 import com.hotlcc.wechat4j.Wechat;
 import com.hotlcc.wechat4j.handler.ReceivedMsgHandler;
 import com.hotlcc.wechat4j.model.ReceivedMsg;
 import com.hotlcc.wechat4j.model.UserInfo;
-import com.hotlcc.wechat4j.util.CommonUtil;
 import com.hotlcc.wechat4j.util.StringUtil;
 import org.junit.Before;
 import org.junit.Test;
@@ -38,13 +38,15 @@ public class TestClass {
 
     public void testSendImage() {
         File file = null;
-        JSONObject result = null;
+        JSONObject result;
         file = new File("C:\\Users\\Administrator\\Pictures\\壁纸\\9e5f4981099bcf351e0ec18c3654aced.jpg");
         result = wechat.sendImageToUserName(null, file);
         file = new File("C:\\Users\\Administrator\\Videos\\手机QQ视频_20190416170016.mp4");
         result = wechat.sendVideoToUserName(null, file);
         System.out.println(result);
-        while (true) CommonUtil.threadSleep(5000);
+        while (true) {
+            ThreadUtil.sleep(5000);
+        }
     }
 
     @Test