利用set集合的键不重复特性:
JSONArray arrayList = jsonResult.getJSONArray("rows"); LOG.info("去除冗余前关联客户数:"+arrayList.size()); Set set = new HashSet(arrayList);
set.size();
List<String> list = new ArrayList<>(); Set set = new HashSet(list);
set.size();
利用set集合的键不重复特性:
JSONArray arrayList = jsonResult.getJSONArray("rows"); LOG.info("去除冗余前关联客户数:"+arrayList.size()); Set set = new HashSet(arrayList);
set.size();
List<String> list = new ArrayList<>(); Set set = new HashSet(list);
set.size();