博客

//对两个 List 遍历匹配数据的优化处理 支持一对多
public List<Map<String, Object>> compareListHitData(List<Map<String, Object>> ChannelList, List<Map<String, Object>> UpdatList) {
		//两个List 如果ID==CHANNEL_ID  用UUID替换掉CHANNEL_ID
       List<Map<String, Object>> resultList = UpdatList.stream().map(map -> ChannelList.stream()
               .filter(m -> Objects.equals(m.get("ID"), map.get("CHANNEL_ID")))
               .findFirst().map(m ->{
                   map.put("CHANNEL_ID",m.get("UUID"));
                   //map.putAll(m);
                   return map;
               }).orElse(null))
               .filter(Objects::nonNull).collect(Collectors.toList());
}