代码展示

public List<RecMrIndexBySendOutBatchNoListResponse> saveBatchPaperRecevieByCheck(RecMrIndexReceiveRequest request) {

List<RecMrIndexEntity> recMrIndexEntityList=request.getRecMrIndexEntities().stream()
    .filter(i->i.getSendOutBatchNo()!=null).collect(Collectors.toList());
List<RecMrIndexBySendOutBatchNoListResponse> checkResponseList=new ArrayList<>();
         
//去除重复的送出号,去除为null的
List<String> batchNoList = recMrIndexEntityList.stream().map(RecMrIndexEntity::getSendOutBatchNo).distinct().collect(Collectors.toList());
if (CollectionUtils.isEmpty(batchNoList)){
      return checkResponseList;
}
for (int i = 0; i < batchNoList.size(); i++) {
String batchNo =batchNoList.get(i);
if (StrUtil.isNotBlank(batchNo)){
List<RecMrIndexEntity> list=recMrIndexEntityList.stream()
    .filter((recMrIndex)->recMrIndex.getSendOutBatchNo().equals(batchNo))
    .collect(Collectors.toList());

List<RecMrIndexBySendOutBatchNoListResponse> selectResponseList =baseMapper.getListBySendOutBatchNo(batchNo);
if(list.size()==selectResponseList.size()){
         continue;
}else{
RecMrIndexBySendOutBatchNoListResponse selectResponse;
Iterator<RecMrIndexBySendOutBatchNoListResponse> iterator= selectResponseList.iterator();
                while (iterator.hasNext()){
                    selectResponse= iterator.next();
                    for (RecMrIndexEntity oldEntity:list){
                        if (selectResponse.getPatientId().equals(oldEntity.getPatientId()) 
                        && selectResponse.getVisitNo().equals(oldEntity.getVisitNo())){
                            iterator.remove();
                        }
                    }
                }
            //合并过滤后的数据
            checkResponseList.addAll(selectResponseList);
            }
           }
        }
//再去除一次重复数据
return  checkResponseList.stream().distinct().collect(Collectors.toList());

这个代码块的主要是对于Steam流的一些简单使用,通过Stream流可以快速得到送出号的列表,并且去除重复元素和空元素,再采用迭代器去除和另一个List中相同的元素,得到新的列表