java 将两个List对象合并并去重

import java.time.format.DateTimeFormatter;
import java.util.Collection;
import java.util.stream.Collectors;
import java.util.stream.Stream;

List orderAppointmentSales = obcOrderAppointmentSalesService.getOrderAppointmentSalesList(syncTime);
List orderAppointmentSales2 = obcOrderAppointmentSalesService.getOrderAppointmentSalesListByTime(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSSSS").format(sas.getUpdateTime()));
//将数据list对象合并去重 使用Stream来帮我们完成操作
List ords = Stream.of(orderAppointmentSales, orderAppointmentSales2)
                        .flatMap(Collection::stream)
                        .distinct()
                        .collect(Collectors.toList());