refactor

@@ -223,22 +223,21 @@ public class AppraiseAddressService {
      * @param areaCode
      * @return
      */
-    public AppraiseAddressInfo findAppraiseAddress(String areaCode){
+    public AppraiseAddressInfo findAppraiseAddress(String areaCode) {
         AppraiseAddressResp addressResp = null;
-        if(StringUtils.isBlank(areaCode)){
+        if (StringUtils.isBlank(areaCode)) {
             return null;
         }
         // 香港鉴定中心
-        if (areaCode.equals(String.valueOf(HK_AREA_CODE))){
+        if (areaCode.equals(String.valueOf(HK_AREA_CODE))) {
             addressResp = queryHKAppraiseAddress();
         }
 
-        // 卖家未发货的情况，根据寄回地址就近选中一个鉴定中心
-        if (addressResp==null){
+        if (Objects.isNull(addressResp)) {
             addressResp = queryAddressByAreaCode(areaCode);
         }
 
-        if (addressResp != null){
+        if (Objects.nonNull(addressResp)) {
             return convert2AppraiseAddressInfo(addressResp);
         } else {
             return null;