diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpService.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpService.java
index 503dd55b0..077488b78 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpService.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpService.java
@@ -3,18 +3,26 @@ package me.chanjar.weixin.mp.api;
 import me.chanjar.weixin.common.bean.WxJsapiSignature;
 import me.chanjar.weixin.common.exception.WxErrorException;
 import me.chanjar.weixin.common.util.http.RequestExecutor;
-import me.chanjar.weixin.mp.bean.*;
-import me.chanjar.weixin.mp.bean.result.*;
-
-import java.text.SimpleDateFormat;
+import me.chanjar.weixin.mp.bean.WxMpCustomMessage;
+import me.chanjar.weixin.mp.bean.WxMpIndustry;
+import me.chanjar.weixin.mp.bean.WxMpMassGroupMessage;
+import me.chanjar.weixin.mp.bean.WxMpMassNews;
+import me.chanjar.weixin.mp.bean.WxMpMassOpenIdsMessage;
+import me.chanjar.weixin.mp.bean.WxMpMassPreviewMessage;
+import me.chanjar.weixin.mp.bean.WxMpMassVideo;
+import me.chanjar.weixin.mp.bean.WxMpSemanticQuery;
+import me.chanjar.weixin.mp.bean.WxMpTemplateMessage;
+import me.chanjar.weixin.mp.bean.result.WxMpMassSendResult;
+import me.chanjar.weixin.mp.bean.result.WxMpMassUploadResult;
+import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
+import me.chanjar.weixin.mp.bean.result.WxMpSemanticQueryResult;
+import me.chanjar.weixin.mp.bean.result.WxMpUser;
 
 /**
  * 微信API的Service
  */
 public interface WxMpService {
 
-  SimpleDateFormat SIMPLE_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd");
-
   /**
    * <pre>
    * 验证推送过来的消息的正确性
diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpDataCubeServiceImpl.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpDataCubeServiceImpl.java
index 092d6af16..0c668e06f 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpDataCubeServiceImpl.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpDataCubeServiceImpl.java
@@ -1,8 +1,17 @@
 package me.chanjar.weixin.mp.api.impl;
 
+import java.text.Format;
+import java.util.Date;
+import java.util.List;
+
+import org.apache.commons.lang3.time.FastDateFormat;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 import com.google.gson.reflect.TypeToken;
+
 import me.chanjar.weixin.common.exception.WxErrorException;
 import me.chanjar.weixin.mp.api.WxMpDataCubeService;
 import me.chanjar.weixin.mp.api.WxMpService;
@@ -13,11 +22,6 @@ import me.chanjar.weixin.mp.bean.datacube.WxDataCubeMsgResult;
 import me.chanjar.weixin.mp.bean.datacube.WxDataCubeUserCumulate;
 import me.chanjar.weixin.mp.bean.datacube.WxDataCubeUserSummary;
 import me.chanjar.weixin.mp.util.json.WxMpGsonBuilder;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.util.Date;
-import java.util.List;
 
 /**
  *  Created by Binary Wang on 2016/8/23.
@@ -27,6 +31,9 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   protected final Logger log = LoggerFactory.getLogger(WxMpDataCubeServiceImpl.class);
 
   private static final String API_URL_PREFIX = "https://api.weixin.qq.com/datacube";
+
+  private final Format dateFormat = FastDateFormat.getInstance("yyyy-MM-dd");
+
   private WxMpService wxMpService;
 
   public WxMpDataCubeServiceImpl(WxMpService wxMpService) {
@@ -37,8 +44,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   public List<WxDataCubeUserSummary> getUserSummary(Date beginDate, Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getusersummary";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -50,8 +57,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   public List<WxDataCubeUserCumulate> getUserCumulate(Date beginDate, Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getusercumulate";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -63,8 +70,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   public List<WxDataCubeArticleResult> getArticleSummary(Date beginDate, Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getarticlesummary";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -76,8 +83,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   public List<WxDataCubeArticleTotal> getArticleTotal(Date beginDate, Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getarticletotal";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -89,8 +96,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   public List<WxDataCubeArticleResult> getUserRead(Date beginDate, Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getuserread";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -102,8 +109,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   public List<WxDataCubeArticleResult> getUserReadHour(Date beginDate, Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getuserreadhour";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -115,8 +122,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   public List<WxDataCubeArticleResult> getUserShare(Date beginDate, Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getusershare";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -128,8 +135,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
   public List<WxDataCubeArticleResult> getUserShareHour(Date beginDate, Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getusersharehour";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -142,8 +149,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       throws WxErrorException {
     String url = API_URL_PREFIX + "/getupstreammsg";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -156,8 +163,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getupstreammsghour";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -170,8 +177,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getupstreammsgweek";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -184,8 +191,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getupstreammsgmonth";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -198,8 +205,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getupstreammsgdist";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -212,8 +219,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getupstreammsgdistweek";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -226,8 +233,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getupstreammsgdistmonth";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -240,8 +247,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getinterfacesummary";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
@@ -254,8 +261,8 @@ public class WxMpDataCubeServiceImpl implements WxMpDataCubeService {
       Date endDate) throws WxErrorException {
     String url = API_URL_PREFIX + "/getinterfacesummaryhour";
     JsonObject param = new JsonObject();
-    param.addProperty("begin_date", WxMpService.SIMPLE_DATE_FORMAT.format(beginDate));
-    param.addProperty("end_date", WxMpService.SIMPLE_DATE_FORMAT.format(endDate));
+    param.addProperty("begin_date", this.dateFormat.format(beginDate));
+    param.addProperty("end_date", this.dateFormat.format(endDate));
     String responseContent = this.wxMpService.post(url, param.toString());
     this.log.debug("\nurl:{}\nparams:{}\nresponse:{}",url, param, responseContent);
     return WxMpGsonBuilder.INSTANCE.create().fromJson(new JsonParser().parse(responseContent).getAsJsonObject().get("list"),
diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxLongTimeJsonSerializer.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxLongTimeJsonSerializer.java
index 388139f2c..957600da8 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxLongTimeJsonSerializer.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxLongTimeJsonSerializer.java
@@ -1,7 +1,9 @@
 package me.chanjar.weixin.mp.util.json;
 
 import java.io.IOException;
-import java.text.SimpleDateFormat;
+import java.text.Format;
+
+import org.apache.commons.lang3.time.FastDateFormat;
 
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.JsonSerializer;
@@ -11,7 +13,7 @@ import com.fasterxml.jackson.databind.SerializerProvider;
  * Created by Binary Wang on 2016/7/13.
  */
 public class WxLongTimeJsonSerializer extends JsonSerializer<Long> {
-  private static SimpleDateFormat DF = new SimpleDateFormat(
+  private static Format DF = FastDateFormat.getInstance(
       "yyyy-MM-dd HH:mm:ss");
 
   @Override
diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpUserCumulateGsonAdapter.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpUserCumulateGsonAdapter.java
index fcf1d403f..b1a7ecf94 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpUserCumulateGsonAdapter.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpUserCumulateGsonAdapter.java
@@ -8,13 +8,19 @@
  */
 package me.chanjar.weixin.mp.util.json;
 
-import com.google.gson.*;
-import me.chanjar.weixin.common.util.json.GsonHelper;
-import me.chanjar.weixin.mp.bean.datacube.WxDataCubeUserCumulate;
-
 import java.lang.reflect.Type;
 import java.text.ParseException;
-import java.text.SimpleDateFormat;
+
+import org.apache.commons.lang3.time.FastDateFormat;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+
+import me.chanjar.weixin.common.util.json.GsonHelper;
+import me.chanjar.weixin.mp.bean.datacube.WxDataCubeUserCumulate;
 
 /**
  * 
@@ -23,7 +29,8 @@ import java.text.SimpleDateFormat;
  */
 public class WxMpUserCumulateGsonAdapter implements JsonDeserializer<WxDataCubeUserCumulate> {
 
-  private static final SimpleDateFormat SIMPLE_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd");
+  private static final FastDateFormat SIMPLE_DATE_FORMAT = FastDateFormat
+      .getInstance("yyyy-MM-dd");
 
   @Override
   public WxDataCubeUserCumulate deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpUserSummaryGsonAdapter.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpUserSummaryGsonAdapter.java
index 848b82cee..adcc0af73 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpUserSummaryGsonAdapter.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpUserSummaryGsonAdapter.java
@@ -8,20 +8,27 @@
  */
 package me.chanjar.weixin.mp.util.json;
 
-import com.google.gson.*;
-import me.chanjar.weixin.common.util.json.GsonHelper;
-import me.chanjar.weixin.mp.bean.datacube.WxDataCubeUserSummary;
-
 import java.lang.reflect.Type;
 import java.text.ParseException;
-import java.text.SimpleDateFormat;
+
+import org.apache.commons.lang3.time.FastDateFormat;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+
+import me.chanjar.weixin.common.util.json.GsonHelper;
+import me.chanjar.weixin.mp.bean.datacube.WxDataCubeUserSummary;
 
 /**
  * @author Daniel Qian
  */
 public class WxMpUserSummaryGsonAdapter implements JsonDeserializer<WxDataCubeUserSummary> {
 
-  private static final SimpleDateFormat SIMPLE_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd");
+  private static final FastDateFormat SIMPLE_DATE_FORMAT = FastDateFormat
+      .getInstance("yyyy-MM-dd");
 
   @Override
   public WxDataCubeUserSummary deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
diff --git a/weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/impl/WxMpDataCubeServiceImplTest.java b/weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/impl/WxMpDataCubeServiceImplTest.java
index bfb8cf584..1111f96a8 100644
--- a/weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/impl/WxMpDataCubeServiceImplTest.java
+++ b/weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/impl/WxMpDataCubeServiceImplTest.java
@@ -1,10 +1,10 @@
 package me.chanjar.weixin.mp.api.impl;
 
 import java.text.ParseException;
-import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.List;
 
+import org.apache.commons.lang3.time.FastDateFormat;
 import org.testng.Assert;
 import org.testng.annotations.DataProvider;
 import org.testng.annotations.Guice;
@@ -28,39 +28,39 @@ import me.chanjar.weixin.mp.bean.datacube.WxDataCubeUserSummary;
  */
 @Guice(modules = ApiTestModule.class)
 public class WxMpDataCubeServiceImplTest {
-  private static SimpleDateFormat simpleDateFormat = new SimpleDateFormat(
-      "yyyy-MM-dd");
+  private FastDateFormat simpleDateFormat = FastDateFormat
+      .getInstance("yyyy-MM-dd");
 
   @Inject
   protected WxMpServiceImpl wxService;
 
   @DataProvider
   public Object[][] oneDay() throws ParseException {
-    return new Object[][] { { simpleDateFormat.parse("2016-08-22") } };
+    return new Object[][] { { this.simpleDateFormat.parse("2016-08-22") } };
   }
 
   @DataProvider
   public Object[][] threeDays() throws ParseException {
-    return new Object[][] { { simpleDateFormat.parse("2016-08-20"),
-        simpleDateFormat.parse("2016-08-22") } };
+    return new Object[][] { { this.simpleDateFormat.parse("2016-08-20"),
+        this.simpleDateFormat.parse("2016-08-22") } };
   }
 
   @DataProvider
   public Object[][] sevenDays() throws ParseException {
-    return new Object[][] { { simpleDateFormat.parse("2016-08-16"),
-        simpleDateFormat.parse("2016-08-22") } };
+    return new Object[][] { { this.simpleDateFormat.parse("2016-08-16"),
+        this.simpleDateFormat.parse("2016-08-22") } };
   }
 
   @DataProvider
   public Object[][] fifteenDays() throws ParseException {
-    return new Object[][] { { simpleDateFormat.parse("2016-08-14"),
-        simpleDateFormat.parse("2016-08-27") } };
+    return new Object[][] { { this.simpleDateFormat.parse("2016-08-14"),
+        this.simpleDateFormat.parse("2016-08-27") } };
   }
 
   @DataProvider
   public Object[][] thirtyDays() throws ParseException {
-    return new Object[][] { { simpleDateFormat.parse("2016-07-30"),
-        simpleDateFormat.parse("2016-08-27") } };
+    return new Object[][] { { this.simpleDateFormat.parse("2016-07-30"),
+        this.simpleDateFormat.parse("2016-08-27") } };
   }
 
   @Test(dataProvider = "sevenDays")