diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpIndustryGsonAdapter.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpIndustryGsonAdapter.java
index 79fb5f0bb..603612499 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpIndustryGsonAdapter.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/json/WxMpIndustryGsonAdapter.java
@@ -1,5 +1,7 @@
 package me.chanjar.weixin.mp.util.json;
 
+import java.lang.reflect.Type;
+
 import com.google.gson.JsonDeserializationContext;
 import com.google.gson.JsonDeserializer;
 import com.google.gson.JsonElement;
@@ -7,38 +9,43 @@ import com.google.gson.JsonObject;
 import com.google.gson.JsonParseException;
 import com.google.gson.JsonSerializationContext;
 import com.google.gson.JsonSerializer;
+
 import me.chanjar.weixin.common.util.json.GsonHelper;
 import me.chanjar.weixin.mp.bean.Industry;
 import me.chanjar.weixin.mp.bean.WxMpIndustry;
 
-import java.lang.reflect.Type;
-
 /**
  * @author miller
  */
-public class WxMpIndustryGsonAdapter implements JsonSerializer<WxMpIndustry>, JsonDeserializer<WxMpIndustry> {
-    @Override
-    public JsonElement serialize(WxMpIndustry wxMpIndustry, Type type, JsonSerializationContext jsonSerializationContext) {
-        JsonObject json = new JsonObject();
-        json.addProperty("industry_id1", wxMpIndustry.getPrimaryIndustry().getId());
-        json.addProperty("industry_id2", wxMpIndustry.getSecondIndustry().getId());
-        return json;
-    }
+public class WxMpIndustryGsonAdapter
+    implements JsonSerializer<WxMpIndustry>, JsonDeserializer<WxMpIndustry> {
+  @Override
+  public JsonElement serialize(WxMpIndustry wxMpIndustry, Type type,
+      JsonSerializationContext jsonSerializationContext) {
+    JsonObject json = new JsonObject();
+    json.addProperty("industry_id1", wxMpIndustry.getPrimaryIndustry().getId());
+    json.addProperty("industry_id2", wxMpIndustry.getSecondIndustry().getId());
+    return json;
+  }
 
-    @Override
-    public WxMpIndustry deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
-        WxMpIndustry wxMpIndustry = new WxMpIndustry();
-        JsonObject primaryIndustry = jsonElement.getAsJsonObject().get("primary_industry").getAsJsonObject();
-        wxMpIndustry.setPrimaryIndustry(convertFromJson(primaryIndustry));
-        JsonObject secondaryIndustry = jsonElement.getAsJsonObject().get("secondary_industry").getAsJsonObject();
-        wxMpIndustry.setSecondIndustry(convertFromJson(secondaryIndustry));
-        return wxMpIndustry;
-    }
+  @Override
+  public WxMpIndustry deserialize(JsonElement jsonElement, Type type,
+      JsonDeserializationContext jsonDeserializationContext)
+      throws JsonParseException {
+    WxMpIndustry wxMpIndustry = new WxMpIndustry();
+    JsonObject primaryIndustry = jsonElement.getAsJsonObject()
+        .get("primary_industry").getAsJsonObject();
+    wxMpIndustry.setPrimaryIndustry(convertFromJson(primaryIndustry));
+    JsonObject secondaryIndustry = jsonElement.getAsJsonObject()
+        .get("secondary_industry").getAsJsonObject();
+    wxMpIndustry.setSecondIndustry(convertFromJson(secondaryIndustry));
+    return wxMpIndustry;
+  }
 
-    private Industry convertFromJson(JsonObject json) {
-        Industry industry = new Industry();
-        industry.setFirstClass(GsonHelper.getString(json, "first_class"));
-        industry.setSecondClass(GsonHelper.getString(json, "second_class"));
-        return industry;
-    }
+  private static Industry convertFromJson(JsonObject json) {
+    Industry industry = new Industry();
+    industry.setFirstClass(GsonHelper.getString(json, "first_class"));
+    industry.setSecondClass(GsonHelper.getString(json, "second_class"));
+    return industry;
+  }
 }