diff --git a/src/main/java/com/hotlcc/wechat4j/Wechat.java b/src/main/java/com/hotlcc/wechat4j/Wechat.java
index a047e72..0c3c863 100644
--- a/src/main/java/com/hotlcc/wechat4j/Wechat.java
+++ b/src/main/java/com/hotlcc/wechat4j/Wechat.java
@@ -1,5 +1,6 @@
 package com.hotlcc.wechat4j;
 
+import cn.hutool.core.io.FileUtil;
 import cn.hutool.core.thread.ThreadUtil;
 import cn.hutool.core.util.StrUtil;
 import com.alibaba.fastjson.JSONArray;
@@ -17,7 +18,6 @@ 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.WebWeixinApiUtil;
@@ -1350,8 +1350,8 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendImageToUserName(String userName, File image) {
-        ContentType contentType = FileUtil.getContentType(image);
-        byte[] mediaData = FileUtil.getBytes(image);
+        ContentType contentType = WechatUtil.getContentType(image);
+        byte[] mediaData = FileUtil.readBytes(image);
         return sendImageToUserName(userName, mediaData, image.getName(), contentType);
     }
 
@@ -1390,8 +1390,8 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendImageToNickName(String nickName, File image) {
-        ContentType contentType = FileUtil.getContentType(image);
-        byte[] mediaData = FileUtil.getBytes(image);
+        ContentType contentType = WechatUtil.getContentType(image);
+        byte[] mediaData = FileUtil.readBytes(image);
         return sendImageToNickName(nickName, mediaData, image.getName(), contentType);
     }
 
@@ -1430,8 +1430,8 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendImageToRemarkName(String remarkName, File image) {
-        ContentType contentType = FileUtil.getContentType(image);
-        byte[] mediaData = FileUtil.getBytes(image);
+        ContentType contentType = WechatUtil.getContentType(image);
+        byte[] mediaData = FileUtil.readBytes(image);
         return sendImageToRemarkName(remarkName, mediaData, image.getName(), contentType);
     }
 
@@ -1480,8 +1480,8 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendImage(String userName, String nickName, String remarkName, File image) {
-        ContentType contentType = FileUtil.getContentType(image);
-        byte[] mediaData = FileUtil.getBytes(image);
+        ContentType contentType = WechatUtil.getContentType(image);
+        byte[] mediaData = FileUtil.readBytes(image);
         return sendImage(userName, nickName, remarkName, mediaData, image.getName(), contentType);
     }
 
@@ -1542,8 +1542,8 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendVideoToUserName(String userName, File video) {
-        ContentType contentType = FileUtil.getContentType(video);
-        byte[] mediaData = FileUtil.getBytes(video);
+        ContentType contentType = WechatUtil.getContentType(video);
+        byte[] mediaData = FileUtil.readBytes(video);
         return sendVideoToUserName(userName, mediaData, video.getName(), contentType);
     }
 
@@ -1582,8 +1582,8 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendVideoToNickName(String nickName, File video) {
-        ContentType contentType = FileUtil.getContentType(video);
-        byte[] mediaData = FileUtil.getBytes(video);
+        ContentType contentType = WechatUtil.getContentType(video);
+        byte[] mediaData = FileUtil.readBytes(video);
         return sendVideoToNickName(nickName, mediaData, video.getName(), contentType);
     }
 
@@ -1622,8 +1622,8 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendVideoToRemarkName(String remarkName, File video) {
-        ContentType contentType = FileUtil.getContentType(video);
-        byte[] mediaData = FileUtil.getBytes(video);
+        ContentType contentType = WechatUtil.getContentType(video);
+        byte[] mediaData = FileUtil.readBytes(video);
         return sendVideoToRemarkName(remarkName, mediaData, video.getName(), contentType);
     }
 
@@ -1672,8 +1672,8 @@ public class Wechat {
      * @return 返回数据
      */
     public JSONObject sendVideo(String userName, String nickName, String remarkName, File video) {
-        ContentType contentType = FileUtil.getContentType(video);
-        byte[] mediaData = FileUtil.getBytes(video);
+        ContentType contentType = WechatUtil.getContentType(video);
+        byte[] mediaData = FileUtil.readBytes(video);
         return sendVideo(userName, nickName, remarkName, mediaData, video.getName(), contentType);
     }
 }
diff --git a/src/main/java/com/hotlcc/wechat4j/util/FileUtil.java b/src/main/java/com/hotlcc/wechat4j/util/FileUtil.java
deleted file mode 100644
index aad54aa..0000000
--- a/src/main/java/com/hotlcc/wechat4j/util/FileUtil.java
+++ /dev/null
@@ -1,82 +0,0 @@
-package com.hotlcc.wechat4j.util;
-
-import lombok.extern.slf4j.Slf4j;
-import org.apache.http.entity.ContentType;
-
-import javax.activation.MimetypesFileTypeMap;
-import java.io.ByteArrayOutputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.IOException;
-
-/**
- * 文件工具类
- *
- * @author Allen
- */
-@Slf4j
-public final class FileUtil {
-    private FileUtil() {
-    }
-
-    /**
-     * 从文件中获取二进制数据
-     *
-     * @param file 文件
-     * @return 二进制数据
-     */
-    public static byte[] getBytes(File file) {
-        if (file == null) {
-            throw new IllegalArgumentException("参数file不能为null");
-        }
-
-        FileInputStream fis = null;
-        ByteArrayOutputStream baos = null;
-        try {
-            fis = new FileInputStream(file);
-            baos = new ByteArrayOutputStream();
-
-            byte[] buffer = new byte[1024];
-            int len;
-
-            while ((len = fis.read(buffer)) != -1) {
-                baos.write(buffer, 0, len);
-            }
-
-            baos.flush();
-            baos.close();
-            fis.close();
-
-            return baos.toByteArray();
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        } finally {
-            if (fis != null) {
-                try {
-                    fis.close();
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
-            }
-            if (baos != null) {
-                try {
-                    baos.close();
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
-            }
-        }
-    }
-
-    /**
-     * 获取文件的ContentType
-     *
-     * @param file 文件
-     * @return ContentType
-     */
-    public static ContentType getContentType(File file) {
-        String mimeType = new MimetypesFileTypeMap().getContentType(file);
-        ContentType contentType = ContentType.parse(mimeType);
-        return contentType;
-    }
-}
diff --git a/src/main/java/com/hotlcc/wechat4j/util/WechatUtil.java b/src/main/java/com/hotlcc/wechat4j/util/WechatUtil.java
index 1d809a1..2ec16df 100644
--- a/src/main/java/com/hotlcc/wechat4j/util/WechatUtil.java
+++ b/src/main/java/com/hotlcc/wechat4j/util/WechatUtil.java
@@ -3,6 +3,10 @@ package com.hotlcc.wechat4j.util;
 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
 import org.apache.commons.lang3.RandomStringUtils;
+import org.apache.http.entity.ContentType;
+
+import javax.activation.MimetypesFileTypeMap;
+import java.io.File;
 
 /**
  * 微信工具类
@@ -56,4 +60,16 @@ public final class WechatUtil {
         }
         return synckey.toString();
     }
+
+    /**
+     * 获取文件的ContentType
+     *
+     * @param file 文件
+     * @return ContentType
+     */
+    public static ContentType getContentType(File file) {
+        String mimeType = new MimetypesFileTypeMap().getContentType(file);
+        ContentType contentType = ContentType.parse(mimeType);
+        return contentType;
+    }
 }