数组对象中根据对象某个字段去重

                ArrayList<TradeCharacterVO> allOfCompanyListCollect = list.stream().collect(Collectors.collectingAndThen(
                        Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(TradeCharacterVO::getCompanyName))), ArrayList::new));

数组对象 根据对象某个字段去重！

list 去重

对象：TradeCharacterVO

去重的字段：getCompanyName