Java中集合中根据对象的某个属性去重

场景

有一个List对象集合，根据每一个对象的某个属性去重。

实现

去重方法：

private static ArrayList<FlightResult> removeDuplicateFlight(List<FlightResult> flights) {
         Set<FlightResult> set = new TreeSet<FlightResult>(new Comparator<FlightResult>() {
             @Override
             public int compare(FlightResult o1, FlightResult o2) {
                 //字符串,则按照asicc码升序排列
                 return o1.getAirlinename().compareTo(o2.getAirlinename());
             }
         });
         set.addAll(flights);
         return new ArrayList<FlightResult>(set);
     }

实际调用示例：

//获取国际机票航空公司不重复航空公司
 private List<FrontSelectModel> getGJAirlineList(List<ResultInfo> resultInfo, List<FrontSelectModel> airlineList) {
 
  List<ResultInfo> tmplist = new ArrayList<ResultInfo>();
  tmplist.addAll(resultInfo); 
  
  List<FlightResult> flightList= new ArrayList<FlightResult>();
  
  //取得所有航班
  for (int i = 0; i < tmplist.size(); i++) {
   for(int k = 0; k < tmplist.get(i).getFlightResult().size(); k++) {
    flightList.add(tmplist.get(i).getFlightResult().get(k));
   }
  }
  //去重
  List<FlightResult> flightListAfterQvChong=removeDuplicateFlight(flightList);
  
  for (FlightResult result : flightListAfterQvChong) {
   FrontSelectModel fsm = new FrontSelectModel();
   fsm.setKey(result.getAirlinename());
   fsm.setValue(result.getAirline());
   airlineList.add(fsm);
  }
  return airlineList;
 }