java8,去重复

 

1.对多个字段去重复

	ArrayList<SupplierDeliveryCountNum> collect = numlist.stream()
							.collect(Collectors.collectingAndThen(
									Collectors.toCollection(() -> new TreeSet<>(
											Comparator.comparing(o -> o.getDeliveryId() + ";" + o.getNum()))),
									ArrayList::new));

　　

 

2. 对全部字段去重复

List<SupplierDeliveryCountNum> distinctIdList = numlist.stream().distinct()
							.collect(Collectors.toList());

　　

 

 

 

 

 

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