ListbackList = new ArrayList(); //根据id去重 backList = backList.stream().collect(Collectors.collectingAndThen(Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(DeclareDelivery :: getId))), ArrayList::new));
ListbackList = new ArrayList(); //根据id去重 backList = backList.stream().collect(Collectors.collectingAndThen(Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(DeclareDelivery :: getId))), ArrayList::new));
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