java list列表根据指定字段去重

1.List指定字段去重

//indexCode为去重字段
hkDoorList.stream().collect(
                Collectors.collectingAndThen(
                        Collectors.toCollection(() ->
                                new TreeSet<>(Comparator.comparing(HkDoorVO::getIndexCode))), ArrayList::new)
        );

2.把List中的某个数据单独抽出某个字段列，并去重

List<String> indexCodes = hkDoorList.stream().map(HkDoorVO::getIndexCode).distinct().collect(Collectors.toList());
//去重
list=list.stream().distinct().collect(Collectors.toList());

标签：java,Collectors,stream,list,List,collect,字段
来源： https://www.cnblogs.com/lovemelucky/p/16419159.html