fix some issues.

src/main/java/cn/quantgroup/xyqb/event/WechatBindingEventListener.java

@@ -4,6 +4,7 @@ import cn.quantgroup.xyqb.entity.User;
 import cn.quantgroup.xyqb.entity.WechatUserInfo;
 import cn.quantgroup.xyqb.repository.IUserRepository;
 import cn.quantgroup.xyqb.repository.IWeChatUserRepository;
+import org.apache.commons.collections.CollectionUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.ApplicationListener;
@@ -34,8 +35,10 @@ public class WechatBindingEventListener implements ApplicationListener<UserLogin
             if (user != null && StringUtils.isNotEmpty(user.getPhoneNo())) {
                 List<WechatUserInfo> wechatUserInfoList = weChatUserRepository.findByPhoneNoAndTenantId(user.getPhoneNo(), user.getTenantId());
                 wechatUserInfoList.forEach(i -> i.setUserId(user.getId()));
+                if (CollectionUtils.isNotEmpty(wechatUserInfoList)) {
                     weChatUserRepository.save(wechatUserInfoList);
                 }
+            }
 
         }
     }