Java stream()用法集合单独取出对象中一个属性成为集合或数组

List<String> stateNameList = dictEntityList.stream().map(DictEntity::getName).collect(Collectors.toList());

Long[] ids = dictEntityList.stream().map(DictEntity::getId).toArray(Long[]::new);

dictEntityList.stream().distinct().collect(Collectors.toList());

stream Java 8 stream

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