diff --git a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/api/impl/WxMaCloudServiceImpl.java b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/api/impl/WxMaCloudServiceImpl.java
index 12436d2c2..3e1681447 100644
--- a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/api/impl/WxMaCloudServiceImpl.java
+++ b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/api/impl/WxMaCloudServiceImpl.java
@@ -5,7 +5,7 @@ import cn.binarywang.wx.miniapp.api.WxMaService;
 import cn.binarywang.wx.miniapp.bean.cloud.*;
 import cn.binarywang.wx.miniapp.bean.cloud.request.WxCloudSendSmsV2Request;
 import cn.binarywang.wx.miniapp.json.WxMaGsonBuilder;
-import cn.binarywang.wx.miniapp.util.JoinerUtils;
+import com.google.common.base.Joiner;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Lists;
 import com.google.gson.JsonArray;
@@ -37,6 +37,8 @@ import static cn.binarywang.wx.miniapp.constant.WxMaApiUrlConstants.Cloud.*;
 @Slf4j
 @RequiredArgsConstructor
 public class WxMaCloudServiceImpl implements WxMaCloudService {
+  private static final Joiner blankJoiner = Joiner.on("").skipNulls();
+
   private final WxMaService wxMaService;
 
   @Override
@@ -55,7 +57,7 @@ public class WxMaCloudServiceImpl implements WxMaCloudService {
   @Override
   public List<String> add(String collection, List list) throws WxErrorException {
     String jsonData = WxMaGsonBuilder.create().toJson(list);
-    String query = JoinerUtils.blankJoiner.join(
+    String query = blankJoiner.join(
       "db.collection('", collection, "')",
       ".add({data: ", jsonData, "})");
 
@@ -79,7 +81,7 @@ public class WxMaCloudServiceImpl implements WxMaCloudService {
   @Override
   public String add(String collection, Object obj) throws WxErrorException {
     String jsonData = WxMaGsonBuilder.create().toJson(obj);
-    String query = JoinerUtils.blankJoiner.join(
+    String query = blankJoiner.join(
       "db.collection('", collection, "')",
       ".add({data: ", jsonData, "})");
 
@@ -110,7 +112,7 @@ public class WxMaCloudServiceImpl implements WxMaCloudService {
 
   @Override
   public Integer delete(String collection, String whereJson) throws WxErrorException {
-    String query = JoinerUtils.blankJoiner.join(
+    String query = blankJoiner.join(
       "db.collection('", collection, "')",
       ".where(", whereJson, ").remove()");
 
@@ -140,7 +142,7 @@ public class WxMaCloudServiceImpl implements WxMaCloudService {
 
   @Override
   public WxCloudDatabaseUpdateResult update(String collection, String whereJson, String updateJson) throws WxErrorException {
-    String query = JoinerUtils.blankJoiner.join(
+    String query = blankJoiner.join(
       "db.collection('", collection, "')",
       ".where(", whereJson, ").update({data:", updateJson, " })");
 
@@ -183,7 +185,7 @@ public class WxMaCloudServiceImpl implements WxMaCloudService {
     if (null == skip) {
       skip = 0;
     }
-    String query = JoinerUtils.blankJoiner.join(
+    String query = blankJoiner.join(
       "db.collection('", collection, "')",
       ".where(", whereJson, ")", orderBySb.toString(), ".skip(", skip, ").limit(", limit, ").get()");
 
@@ -221,7 +223,7 @@ public class WxMaCloudServiceImpl implements WxMaCloudService {
 
   @Override
   public Long count(String collection, String whereJson) throws WxErrorException {
-    String query = JoinerUtils.blankJoiner.join(
+    String query = blankJoiner.join(
       "db.collection('", collection, "')",
       ".where(", whereJson, ").count()");
 
@@ -415,7 +417,7 @@ public class WxMaCloudServiceImpl implements WxMaCloudService {
   @Override
   public WxCloudSendSmsV2Result sendSmsV2(WxCloudSendSmsV2Request request) throws WxErrorException {
     // 如果没有指定云环境ID，取默认云环境ID
-    if (request.getEnv() == null){
+    if (request.getEnv() == null) {
       String cloudEnv = this.wxMaService.getWxMaConfig().getCloudEnv();
       request.setEnv(cloudEnv);
     }
diff --git a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/util/JoinerUtils.java b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/util/JoinerUtils.java
deleted file mode 100644
index 3ef3eb915..000000000
--- a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/util/JoinerUtils.java
+++ /dev/null
@@ -1,253 +0,0 @@
-/**
- * Copyright (c) 2019,sunnybs.
- * All Rights Reserved.
- * <p>
- * Project Name:yigou
- */
-package cn.binarywang.wx.miniapp.util;
-
-import com.google.common.base.Joiner;
-
-/**
- * ClassName: JoinerUtils <br/>
- * Description: 字符串连接器 <br/>
- * Date: 2019年10月18日 下午1:42:59 <br/>
- *
- * @author <a href="https://gitee.com/esunego_hunan/weixin-java-tools">wsp</a>
- */
-
-public class JoinerUtils {
-    private static final String NULL = "null";
-
-    /**
-     * <p>
-     * 空白连接器，忽略null
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.blankJoiner.join("a", "b", "c");
-     * <b>result : </b>abc
-     * 
-     * JoinerUtils.blankJoiner.join("a", null, "c");
-     * <b>result : </b>ac
-     * </pre>
-     */
-    public static final Joiner blankJoiner = Joiner.on("").skipNulls();
-    /**
-     * <p>
-     * 空白连接器
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.blankJoinerWithNull.join("a", "b", "c");
-     * <b>result : </b>abc
-     * 
-     * JoinerUtils.blankJoinerWithNull.join("a", null, "c");
-     * <b>result : </b>anullc
-     * </pre>
-     */
-    public static final Joiner blankJoinerWithNull = Joiner.on("").useForNull(NULL);
-
-    /**
-     * <p>
-     * 空格连接器，忽略null
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.spaceJoiner.join("a", "b", "c");
-     * <b>result : </b>a b c
-     * 
-     * JoinerUtils.spaceJoiner.join("a", null, "c");
-     * <b>result : </b>a c
-     * </pre>
-     */
-    public static final Joiner spaceJoiner = Joiner.on(" ").skipNulls();
-    /**
-     * <p>
-     * 空格连接器
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.spaceJoinerWithNull.join("a", "b", "c");
-     * <b>result : </b>a b c
-     * 
-     * JoinerUtils.spaceJoinerWithNull.join("a", null, "c");
-     * <b>result : </b>a null c
-     * </pre>
-     */
-    public static final Joiner spaceJoinerWithNull = Joiner.on(" ").useForNull(NULL);
-
-  /**
-   * <p>
-   * 逗号分隔符连接器，忽略null
-   * </p>
-   *
-   * <pre>
-   * JoinerUtils.commaJoiner.join("a", "b", "c");
-   * <b>result : </b>a,b,c
-   *
-   * JoinerUtils.commaJoiner.join("a", null, "c");
-   * <b>result : </b>a,c
-   * </pre>
-   */
-  public static final Joiner commaJoiner = Joiner.on(",").skipNulls();
-  /**
-   * <p>
-   * 逗号分隔符连接器
-   * </p>
-   *
-   * <pre>
-   * JoinerUtils.commaJoinerWithNull.join("a", "b", "c");
-   * <b>result : </b>a,b,c
-   *
-   * JoinerUtils.commaJoinerWithNull.join("a", null, "c");
-   * <b>result : </b>a,null,c
-   * </pre>
-   */
-  public static final Joiner commaJoinerWithNull = Joiner.on(",").useForNull(NULL);
-
-  /**
-   * <p>
-   * 等号分隔符连接器，忽略null
-   * </p>
-   *
-   * <pre>
-   * JoinerUtils.equalJoiner.join("a", "b", "c");
-   * <b>result : </b>a=b=c
-   *
-   * JoinerUtils.equalJoiner.join("a", null, "c");
-   * <b>result : </b>a=c
-   * </pre>
-   */
-  public static final Joiner equalJoiner = Joiner.on("=").skipNulls();
-  /**
-   * <p>
-   * 等号分隔符连接器
-   * </p>
-   *
-   * <pre>
-   * JoinerUtils.equalJoinerWithNull.join("a", "b", "c");
-   * <b>result : </b>a=b=c
-   *
-   * JoinerUtils.equalJoinerWithNull.join("a", null, "c");
-   * <b>result : </b>a=null=c
-   * </pre>
-   */
-  public static final Joiner equalJoinerWithNull = Joiner.on("=").useForNull(NULL);
-
-    /**
-     * <p>
-     * 竖线分隔符连接器，忽略null
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.vLineJoiner.join("a", "b", "c");
-     * <b>result : </b>a|b|c
-     * 
-     * JoinerUtils.vLineJoiner.join("a", null, "c");
-     * <b>result : </b>a|c
-     * </pre>
-     */
-    public static final Joiner vLineJoiner = Joiner.on("|").skipNulls();
-    /**
-     * <p>
-     * 竖线分隔符连接器
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.vLineJoinerWithNull.join("a", "b", "c");
-     * <b>result : </b>a|b|c
-     * 
-     * JoinerUtils.vLineJoinerWithNull.join("a", null, "c");
-     * <b>result : </b>a|null|c
-     * </pre>
-     */
-    public static final Joiner vLineJoinerWithNull = Joiner.on("|").useForNull(NULL);
-
-    /**
-     * <p>
-     * 中横线分隔符连接器，忽略null
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.hLineJoiner.join("a", "b", "c");
-     * <b>result : </b>a-b-c
-     * 
-     * JoinerUtils.hLineJoiner.join("a", null, "c");
-     * <b>result : </b>a-c
-     * </pre>
-     */
-    public static final Joiner hLineJoiner = Joiner.on("-").skipNulls();
-    /**
-     * <p>
-     * 中横线分隔符连接器
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.hLineJoinerWithNull.join("a", "b", "c");
-     * <b>result : </b>a-b-c
-     * 
-     * JoinerUtils.hLineJoinerWithNull.join("a", null, "c");
-     * <b>result : </b>a-null-c
-     * </pre>
-     */
-    public static final Joiner hLineJoinerWithNull = Joiner.on("-").useForNull(NULL);
-
-    /**
-     * <p>
-     * 下划线分隔符连接器，忽略null
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.underlineJoiner.join("a", "b", "c");
-     * <b>result : </b>a_b_c
-     * 
-     * JoinerUtils.underlineJoiner.join("a", null, "c");
-     * <b>result : </b>a_c
-     * </pre>
-     */
-    public static final Joiner underlineJoiner = Joiner.on("_").skipNulls();
-    /**
-     * <p>
-     * 下划线分隔符连接器
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.underlineJoinerWithNull.join("a", "b", "c");
-     * <b>result : </b>a_b_c
-     * 
-     * JoinerUtils.underlineJoinerWithNull.join("a", null, "c");
-     * <b>result : </b>a_null_c
-     * </pre>
-     */
-    public static final Joiner underlineJoinerWithNull = Joiner.on("_").useForNull(NULL);
-
-    /**
-     * <p>
-     * 斜线分隔符连接器，忽略null
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.pathJoiner.join("a", "b", "c");
-     * <b>result : </b>a/b/c
-     * 
-     * JoinerUtils.pathJoiner.join("a", null, "c");
-     * <b>result : </b>a/c
-     * </pre>
-     */
-    public static final Joiner pathJoiner = Joiner.on("/").skipNulls();
-    /**
-     * <p>
-     * 斜线分隔符连接器
-     * </p>
-     *
-     * <pre>
-     * JoinerUtils.pathJoinerWithNull.join("a", "b", "c");
-     * <b>result : </b>a/b/c
-     * 
-     * JoinerUtils.pathJoinerWithNull.join("a", null, "c");
-     * <b>result : </b>a/null/c
-     * </pre>
-     */
-    public static final Joiner pathJoinerWithNull = Joiner.on("/").useForNull(NULL);
-}