fix some code

Author: binarywang

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpQrcodeService.java

@@ -6,8 +6,10 @@
 import java.io.File;
 
 /**
+ * <pre>
  * 二维码相关操作接口
  * 文档地址：https://mp.weixin.qq.com/wiki?action=doc&id=mp1443433542&t=0.9274944716856435
+ * </pre>
  * @author Binary Wang
  */
 public interface WxMpQrcodeService {

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpQrcodeServiceImpl.java

@@ -43,9 +43,8 @@ public WxMpQrCodeTicket qrCodeCreateTmpTicket(int sceneId, Integer expireSeconds
     String url = API_URL_PREFIX + "/create";
     JsonObject json = new JsonObject();
     json.addProperty("action_name", "QR_SCENE");
-    if (expireSeconds != null) {
-      json.addProperty("expire_seconds", expireSeconds);
-    }
+    json.addProperty("expire_seconds", expireSeconds);
+
     JsonObject actionInfo = new JsonObject();
     JsonObject scene = new JsonObject();
     scene.addProperty("scene_id", sceneId);