diff --git a/src/main/java/com/hotlcc/wechat4j/Wechat.java b/src/main/java/com/hotlcc/wechat4j/Wechat.java
index f17c462..a047e72 100644
--- a/src/main/java/com/hotlcc/wechat4j/Wechat.java
+++ b/src/main/java/com/hotlcc/wechat4j/Wechat.java
@@ -1,6 +1,7 @@
 package com.hotlcc.wechat4j;
 
 import cn.hutool.core.thread.ThreadUtil;
+import cn.hutool.core.util.StrUtil;
 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
 import com.hotlcc.wechat4j.enums.ExitType;
@@ -19,7 +20,6 @@ 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;
@@ -237,7 +237,7 @@ public class Wechat {
                 return null;
             }
 
-            if (StringUtil.isEmpty(uuid)) {
+            if (StrUtil.isEmpty(uuid)) {
                 pw.print("\t失败");
                 if (i == 0 && time > 0) {
                     pw.print("，将重复尝试" + time + "次");
@@ -398,7 +398,7 @@ public class Wechat {
         }
 
         String uuid = result.getString("uuid");
-        if (StringUtil.isEmpty(uuid)) {
+        if (StrUtil.isEmpty(uuid)) {
             pw.println("\t失败：空值");
             pw.flush();
             return null;
@@ -522,13 +522,13 @@ public class Wechat {
         // 2、登录
         // 2.1、获取uuid
         String uuid = null;
-        if (tryPushLogin && StringUtil.isNotEmpty(wxuin)) {
+        if (tryPushLogin && StrUtil.isNotEmpty(wxuin)) {
             uuid = getWxUuid(pw, wxuin);
         }
-        if (StringUtil.isEmpty(uuid)) {
+        if (StrUtil.isEmpty(uuid)) {
             uuid = getWxUuid(pw, time);
         }
-        if (StringUtil.isEmpty(uuid)) {
+        if (StrUtil.isEmpty(uuid)) {
             pw.println("无法获取uuid，登录不成功");
             pw.flush();
             return false;
@@ -1050,7 +1050,7 @@ public class Wechat {
      * @return 返回数据
      */
     public UserInfo getContactByUserName(boolean update, String userName) {
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
 
@@ -1084,7 +1084,7 @@ public class Wechat {
      * @return 返回数据
      */
     public UserInfo getContactByNickName(boolean update, String nickName) {
-        if (StringUtil.isEmpty(nickName)) {
+        if (StrUtil.isEmpty(nickName)) {
             return null;
         }
 
@@ -1118,7 +1118,7 @@ public class Wechat {
      * @return 返回数据
      */
     public UserInfo getContactByRemarkName(boolean update, String remarkName) {
-        if (StringUtil.isEmpty(remarkName)) {
+        if (StrUtil.isEmpty(remarkName)) {
             return null;
         }
 
@@ -1154,11 +1154,11 @@ public class Wechat {
      * @return 返回数据
      */
     public UserInfo getContact(boolean update, String userName, String nickName, String remarkName) {
-        if (StringUtil.isNotEmpty(userName)) {
+        if (StrUtil.isNotEmpty(userName)) {
             return getContactByUserName(update, userName);
-        } else if (StringUtil.isNotEmpty(nickName)) {
+        } else if (StrUtil.isNotEmpty(nickName)) {
             return getContactByNickName(update, nickName);
-        } else if (StringUtil.isNotEmpty(remarkName)) {
+        } else if (StrUtil.isNotEmpty(remarkName)) {
             return getContactByRemarkName(update, remarkName);
         } else {
             return getLoginUser(update);
@@ -1176,7 +1176,7 @@ public class Wechat {
      * @return 返回数据
      */
     public byte[] getContactHeadImgByUserName(String userName) {
-        if (!StringUtil.isEmpty(userName)) {
+        if (!StrUtil.isEmpty(userName)) {
             return WebWeixinApiUtil.getContactHeadImg(httpClient, urlVersion, userName);
         } else {
             return WebWeixinApiUtil.getContactHeadImg(httpClient, urlVersion, getLoginUserName());
@@ -1200,7 +1200,7 @@ public class Wechat {
         message.setContent(content);
         message.setFromUserName(loginUserName);
         message.setLocalID(msgId);
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             message.setToUserName(loginUserName);
         } else {
             message.setToUserName(userName);
@@ -1218,7 +1218,7 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendTextToNickName(String nickName, String content) {
-        if (StringUtil.isEmpty(nickName)) {
+        if (StrUtil.isEmpty(nickName)) {
             return sendTextToUserName(null, content);
         }
 
@@ -1228,7 +1228,7 @@ public class Wechat {
         }
 
         String userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
 
@@ -1243,7 +1243,7 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendTextToRemarkName(String remarkName, String content) {
-        if (StringUtil.isEmpty(remarkName)) {
+        if (StrUtil.isEmpty(remarkName)) {
             return sendTextToUserName(null, content);
         }
 
@@ -1253,7 +1253,7 @@ public class Wechat {
         }
 
         String userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
 
@@ -1272,11 +1272,11 @@ public class Wechat {
     public JSONObject sendText(String userName, String nickName, String remarkName, String content) {
         UserInfo userInfo;
 
-        if (StringUtil.isNotEmpty(userName)) {
+        if (StrUtil.isNotEmpty(userName)) {
             return sendTextToUserName(userName, content);
-        } else if (StringUtil.isNotEmpty(nickName)) {
+        } else if (StrUtil.isNotEmpty(nickName)) {
             userInfo = getContactByNickName(false, nickName);
-        } else if (StringUtil.isNotEmpty(remarkName)) {
+        } else if (StrUtil.isNotEmpty(remarkName)) {
             userInfo = getContactByRemarkName(false, remarkName);
         } else {
             String loginUserName = getLoginUserName(false);
@@ -1287,7 +1287,7 @@ public class Wechat {
             return null;
         }
         userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
         return sendTextToUserName(userName, content);
@@ -1304,7 +1304,7 @@ public class Wechat {
      */
     public JSONObject sendImageToUserName(String userName, byte[] mediaData, String mediaName, ContentType contentType) {
         String loginUserName = getLoginUserName(false);
-        String toUserName = StringUtil.isEmpty(userName) ? loginUserName : userName;
+        String toUserName = StrUtil.isEmpty(userName) ? loginUserName : userName;
         BaseRequest baseRequest = new BaseRequest(wxsid, skey, wxuin);
 
         // 上传媒体文件
@@ -1323,7 +1323,7 @@ public class Wechat {
         }
 
         String mediaId = result.getString("MediaId");
-        if (StringUtil.isEmpty(mediaId)) {
+        if (StrUtil.isEmpty(mediaId)) {
             return result;
         }
 
@@ -1365,7 +1365,7 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendImageToNickName(String nickName, byte[] mediaData, String mediaName, ContentType contentType) {
-        if (StringUtil.isEmpty(nickName)) {
+        if (StrUtil.isEmpty(nickName)) {
             return sendImageToUserName(null, mediaData, mediaName, contentType);
         }
 
@@ -1375,7 +1375,7 @@ public class Wechat {
         }
 
         String userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
 
@@ -1405,7 +1405,7 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendImageToRemarkName(String remarkName, byte[] mediaData, String mediaName, ContentType contentType) {
-        if (StringUtil.isEmpty(remarkName)) {
+        if (StrUtil.isEmpty(remarkName)) {
             return sendImageToUserName(null, mediaData, mediaName, contentType);
         }
 
@@ -1415,7 +1415,7 @@ public class Wechat {
         }
 
         String userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
 
@@ -1449,11 +1449,11 @@ public class Wechat {
     public JSONObject sendImage(String userName, String nickName, String remarkName, byte[] mediaData, String mediaName, ContentType contentType) {
         UserInfo userInfo;
 
-        if (StringUtil.isNotEmpty(userName)) {
+        if (StrUtil.isNotEmpty(userName)) {
             return sendImageToUserName(userName, mediaData, mediaName, contentType);
-        } else if (StringUtil.isNotEmpty(nickName)) {
+        } else if (StrUtil.isNotEmpty(nickName)) {
             userInfo = getContactByNickName(false, nickName);
-        } else if (StringUtil.isNotEmpty(remarkName)) {
+        } else if (StrUtil.isNotEmpty(remarkName)) {
             userInfo = getContactByRemarkName(false, remarkName);
         } else {
             String loginUserName = getLoginUserName(false);
@@ -1464,7 +1464,7 @@ public class Wechat {
             return null;
         }
         userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
         return sendImageToUserName(userName, mediaData, mediaName, contentType);
@@ -1496,7 +1496,7 @@ public class Wechat {
      */
     public JSONObject sendVideoToUserName(String userName, byte[] mediaData, String mediaName, ContentType contentType) {
         String loginUserName = getLoginUserName(false);
-        String toUserName = StringUtil.isEmpty(userName) ? loginUserName : userName;
+        String toUserName = StrUtil.isEmpty(userName) ? loginUserName : userName;
         BaseRequest baseRequest = new BaseRequest(wxsid, skey, wxuin);
 
         // 上传媒体文件
@@ -1515,7 +1515,7 @@ public class Wechat {
         }
 
         String mediaId = result.getString("MediaId");
-        if (StringUtil.isEmpty(mediaId)) {
+        if (StrUtil.isEmpty(mediaId)) {
             return result;
         }
 
@@ -1557,7 +1557,7 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendVideoToNickName(String nickName, byte[] mediaData, String mediaName, ContentType contentType) {
-        if (StringUtil.isEmpty(nickName)) {
+        if (StrUtil.isEmpty(nickName)) {
             return sendVideoToUserName(null, mediaData, mediaName, contentType);
         }
 
@@ -1567,7 +1567,7 @@ public class Wechat {
         }
 
         String userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
 
@@ -1597,7 +1597,7 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendVideoToRemarkName(String remarkName, byte[] mediaData, String mediaName, ContentType contentType) {
-        if (StringUtil.isEmpty(remarkName)) {
+        if (StrUtil.isEmpty(remarkName)) {
             return sendVideoToUserName(null, mediaData, mediaName, contentType);
         }
 
@@ -1607,7 +1607,7 @@ public class Wechat {
         }
 
         String userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
 
@@ -1641,11 +1641,11 @@ public class Wechat {
     public JSONObject sendVideo(String userName, String nickName, String remarkName, byte[] mediaData, String mediaName, ContentType contentType) {
         UserInfo userInfo;
 
-        if (StringUtil.isNotEmpty(userName)) {
+        if (StrUtil.isNotEmpty(userName)) {
             return sendVideoToUserName(userName, mediaData, mediaName, contentType);
-        } else if (StringUtil.isNotEmpty(nickName)) {
+        } else if (StrUtil.isNotEmpty(nickName)) {
             userInfo = getContactByNickName(false, nickName);
-        } else if (StringUtil.isNotEmpty(remarkName)) {
+        } else if (StrUtil.isNotEmpty(remarkName)) {
             userInfo = getContactByRemarkName(false, remarkName);
         } else {
             String loginUserName = getLoginUserName(false);
@@ -1656,7 +1656,7 @@ public class Wechat {
             return null;
         }
         userName = userInfo.getUserName();
-        if (StringUtil.isEmpty(userName)) {
+        if (StrUtil.isEmpty(userName)) {
             return null;
         }
         return sendVideoToUserName(userName, mediaData, mediaName, contentType);
diff --git a/src/main/java/com/hotlcc/wechat4j/util/StringUtil.java b/src/main/java/com/hotlcc/wechat4j/util/StringUtil.java
deleted file mode 100644
index 3c34f00..0000000
--- a/src/main/java/com/hotlcc/wechat4j/util/StringUtil.java
+++ /dev/null
@@ -1,44 +0,0 @@
-package com.hotlcc.wechat4j.util;
-
-import java.io.UnsupportedEncodingException;
-import java.net.URLDecoder;
-import java.net.URLEncoder;
-import java.util.UUID;
-
-/**
- * 字符串工具类
- *
- * @author Allen
- */
-public final class StringUtil {
-    private StringUtil() {
-    }
-
-    public static boolean isEmpty(String str) {
-        return str == null || "".equals(str);
-    }
-
-    public static boolean isNotEmpty(String str) {
-        return !isEmpty(str);
-    }
-
-    public static String encodeURL(String str, String enc) {
-        try {
-            return URLEncoder.encode(str, enc);
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    public static String decodeURL(String str, String enc) {
-        try {
-            return URLDecoder.decode(str, enc);
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    public static String getUuid() {
-        return UUID.randomUUID().toString().replace("-", "").toLowerCase();
-    }
-}
diff --git a/src/main/java/com/hotlcc/wechat4j/util/WebWeixinApiUtil.java b/src/main/java/com/hotlcc/wechat4j/util/WebWeixinApiUtil.java
index 65c9f0b..68c84b3 100644
--- a/src/main/java/com/hotlcc/wechat4j/util/WebWeixinApiUtil.java
+++ b/src/main/java/com/hotlcc/wechat4j/util/WebWeixinApiUtil.java
@@ -1,5 +1,7 @@
 package com.hotlcc.wechat4j.util;
 
+import cn.hutool.core.util.StrUtil;
+import cn.hutool.core.util.URLUtil;
 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
 import com.hotlcc.wechat4j.enums.LoginTip;
@@ -9,7 +11,11 @@ import com.hotlcc.wechat4j.model.MediaMessage;
 import com.hotlcc.wechat4j.model.WxMessage;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.codec.digest.DigestUtils;
-import org.apache.http.*;
+import org.apache.http.Consts;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpStatus;
+import org.apache.http.NameValuePair;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.client.entity.UrlEncodedFormEntity;
@@ -101,7 +107,7 @@ public final class WebWeixinApiUtil {
 
             String uuid = matcher.group(2);
             result.put("uuid", uuid);
-            if (StringUtil.isEmpty(uuid)) {
+            if (StrUtil.isEmpty(uuid)) {
                 throw new RuntimeException("获取的uuid为空");
             }
 
@@ -274,7 +280,7 @@ public final class WebWeixinApiUtil {
                 String url = new ST(PropertiesUtil.getProperty("webwx-url.logout_url"))
                         .add("urlVersion", urlVersion)
                         .add("type", i)
-                        .add("skey", StringUtil.encodeURL(baseRequest.getSkey(), Consts.UTF_8.name()))
+                        .add("skey", URLUtil.encode(baseRequest.getSkey()))
                         .render();
 
                 HttpPost httpPost = new HttpPost(url);
@@ -342,7 +348,7 @@ public final class WebWeixinApiUtil {
         try {
             String url = new ST(PropertiesUtil.getProperty("webwx-url.webwxinit_url"))
                     .add("urlVersion", urlVersion)
-                    .add("pass_ticket", StringUtil.encodeURL(passticket, Consts.UTF_8.name()))
+                    .add("pass_ticket", URLUtil.encode(passticket))
                     .add("r", System.currentTimeMillis() / 1252L)
                     .render();
 
@@ -388,7 +394,7 @@ public final class WebWeixinApiUtil {
         try {
             String url = new ST(PropertiesUtil.getProperty("webwx-url.statusnotify_url"))
                     .add("urlVersion", urlVersion)
-                    .add("pass_ticket", StringUtil.encodeURL(passticket, Consts.UTF_8.name()))
+                    .add("pass_ticket", URLUtil.encode(passticket))
                     .render();
 
             HttpPost httpPost = new HttpPost(url);
@@ -437,11 +443,11 @@ public final class WebWeixinApiUtil {
             String url = new ST(PropertiesUtil.getProperty("webwx-url.synccheck_url"))
                     .add("urlVersion", urlVersion)
                     .add("r", millis)
-                    .add("skey", StringUtil.encodeURL(baseRequest.getSkey(), Consts.UTF_8.name()))
+                    .add("skey", URLUtil.encode(baseRequest.getSkey()))
                     .add("sid", baseRequest.getSid())
                     .add("uin", baseRequest.getUin())
                     .add("deviceid", WechatUtil.createDeviceID())
-                    .add("synckey", StringUtil.encodeURL(WechatUtil.syncKeyListToString(syncKeyList), Consts.UTF_8.name()))
+                    .add("synckey", URLUtil.encode(WechatUtil.syncKeyListToString(syncKeyList)))
                     .add("_", millis)
                     .render();
 
@@ -494,9 +500,9 @@ public final class WebWeixinApiUtil {
         try {
             String url = new ST(PropertiesUtil.getProperty("webwx-url.getcontact_url"))
                     .add("urlVersion", urlVersion)
-                    .add("pass_ticket", StringUtil.encodeURL(passticket, Consts.UTF_8.name()))
+                    .add("pass_ticket", URLUtil.encode(passticket))
                     .add("r", System.currentTimeMillis())
-                    .add("skey", StringUtil.encodeURL(skey, Consts.UTF_8.name()))
+                    .add("skey", URLUtil.encode(skey))
                     .render();
 
             HttpGet httpGet = new HttpGet(url);
@@ -535,7 +541,7 @@ public final class WebWeixinApiUtil {
         try {
             String url = new ST(PropertiesUtil.getProperty("webwx-url.batchgetcontact_url"))
                     .add("urlVersion", urlVersion)
-                    .add("pass_ticket", StringUtil.encodeURL(passticket, Consts.UTF_8.name()))
+                    .add("pass_ticket", URLUtil.encode(passticket))
                     .add("r", System.currentTimeMillis())
                     .render();
 
@@ -621,7 +627,7 @@ public final class WebWeixinApiUtil {
                     .add("urlVersion", urlVersion)
                     .add("skey", baseRequest.getSkey())
                     .add("sid", baseRequest.getSid())
-                    .add("pass_ticket", StringUtil.encodeURL(passticket, Consts.UTF_8.name()))
+                    .add("pass_ticket", URLUtil.encode(passticket))
                     .render();
 
             HttpPost httpPost = new HttpPost(url);
@@ -667,7 +673,7 @@ public final class WebWeixinApiUtil {
         try {
             String url = new ST(PropertiesUtil.getProperty("webwx-url.webwxsendmsg_url"))
                     .add("urlVersion", urlVersion)
-                    .add("pass_ticket", StringUtil.encodeURL(passticket, Consts.UTF_8.name()))
+                    .add("pass_ticket", URLUtil.encode(passticket))
                     .render();
 
             HttpPost httpPost = new HttpPost(url);
@@ -817,7 +823,7 @@ public final class WebWeixinApiUtil {
         try {
             String url = new ST(PropertiesUtil.getProperty("webwx-url.webwxsendmsgimg_url"))
                     .add("urlVersion", urlVersion)
-                    .add("pass_ticket", StringUtil.encodeURL(passticket, Consts.UTF_8.name()))
+                    .add("pass_ticket", URLUtil.encode(passticket))
                     .render();
 
             HttpPost httpPost = new HttpPost(url);
diff --git a/src/test/java/TestClass.java b/src/test/java/TestClass.java
index 92cbdec..c0601f9 100644
--- a/src/test/java/TestClass.java
+++ b/src/test/java/TestClass.java
@@ -1,10 +1,10 @@
 import cn.hutool.core.thread.ThreadUtil;
+import cn.hutool.core.util.StrUtil;
 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.StringUtil;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -23,7 +23,7 @@ public class TestClass {
             @Override
             public void handleAllType(Wechat wechat, ReceivedMsg msg) {
                 UserInfo contact = wechat.getContactByUserName(false, msg.getFromUserName());
-                String name = StringUtil.isEmpty(contact.getRemarkName()) ? contact.getNickName() : contact.getRemarkName();
+                String name = StrUtil.isEmpty(contact.getRemarkName()) ? contact.getNickName() : contact.getRemarkName();
                 System.out.println(name + ": " + msg.getContent());
             }
         });