优化这段代码 ArrayList<String> stnCodeList = new ArrayList<>(Arrays.asList("1020C", "1021C", "1135C", "1136C" , "1137C", "1138C", "1139C" , "1140C" , "1141C" , "1142C" , "1143C" , "1144C" , "1145C" , "1147C" , "1149C" , "1221C" , "1222C" , "1223C" , "1224C","1146C","1119C","1148C")); @GetMapping("stn") public CommonResult airStation(){ HttpResponse response = HttpRequest.get(Constants.SMALL_AIR_STATION).execute(); List<AirStationVo> data = new ArrayList<>(); try { if (response.getStatus() == HttpStatus.HTTP_OK) { String body = response.body(); CommonResult commonResult = JSONUtil.toBean(body, CommonResult.class); List<JSONObject> airStationVos = (List)commonResult.getData(); for (String value : stnCodeList) { for (JSONObject stationVo : airStationVos) { AirStationVo airStationVo = JSONUtil.toBean(stationVo, AirStationVo.class); String stnCode = airStationVo.getStnCode(); String s = value; if (s.equals(stnCode)) { data.add(airStationVo); } } } } }catch (Exception e) { e.printStackTrace(); return CommonResult.failed(e.getMessage()); } return CommonResult.success(data,"成功"); }

首先，可以将 `stnCodeList` 改为 `Set<String>` 类型，这样查找元素的时间复杂度会更低。其次，可以使用流式 API 来简化代码并提高效率。修改后的代码如下：

Set<String> stnCodeSet = new HashSet<>(Arrays.asList("1020C", "1021C", "1135C", "1136C", "1137C", "1138C", "1139C", "1140C", "1141C", "1142C", "1143C", "1144C", "1145C", "1147C", "1149C", "1221C", "1222C", "1223C", "1224C", "1146C", "1119C", "1148C"));

@GetMapping("stn")
public CommonResult airStation() {
    HttpResponse response = HttpRequest.get(Constants.SMALL_AIR_STATION).execute();
    try {
        if (response.getStatus() == HttpStatus.HTTP_OK) {
            String body = response.body();
            CommonResult commonResult = JSONUtil.toBean(body, CommonResult.class);
            List<JSONObject> airStationVos = (List)commonResult.getData();
            List<AirStationVo> data = airStationVos.stream()
                    .map(stationVo -> JSONUtil.toBean(stationVo, AirStationVo.class))
                    .filter(station -> stnCodeSet.contains(station.getStnCode()))
                    .collect(Collectors.toList());
            return CommonResult.success(data, "成功");
        }
    } catch (Exception e) {
        e.printStackTrace();
        return CommonResult.failed(e.getMessage());
    }
    return CommonResult.failed("请求失败");
}

使用流式 API 可以简化代码并提高效率。同时，将 `stnCodeList` 改为 `Set<String>` 类型，可以提高查找元素的效率。