java 8 中获取List结合中过滤后的重复数据

//excel文件上传数据
List list = importResult.getList();

if (list.size() >200) {

String error = Constants.OPERATE_ERROR +"导入数量不能大于200条";

result.setSubMessage(error);

result.setSubCode(0);

return result;

}

//过滤表格重复数据

//临时存储数据

List billSku =new ArrayList();

//重复数据

List existSkuList =new ArrayList();

List tempSkuList = list.stream().filter(v->{

boolean flag = !billSku.contains(v.getProdSku());

billSku.add(v.getProdSku());

if (!flag){

//重复数据里过滤重复，打印到客户端

boolean existFlag = !existSkuList.contains(v.getProdSku());

if (existFlag){

existSkuList.add(v.getProdSku());

}

}

return flag;

}).collect(Collectors.toList());

if (tempSkuList.size() 

String error ="excel表格中" + existSkuList +"重复！";

result.setSubMessage(error);

result.setSubCode(0);

return result;

}