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This article introduces the knowledge of "how to implement array object filtering". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Object filtering

List sensorParameters = listBSensorParams.stream () .distinct () .collect (Collectors.toList ())

two。 Objects are sorted by a property

List baseCodelists = new ArrayList ()

BaseCodelists.sort (Comparator.comparing (BaseCodelistDTO::getSeqNo))

Sort in 3.List

List directoryPathList = new ArrayList ()

DirectoryPathList.sort (Comparator.reverseOrder ()); / / descending order

4.jpa sql

Query (value = "select * from base_preset where id! =? 1 and base_sensor_id =? 2 and preset_no =? 3", nativeQuery = true)

List findPresetBySensorIdAndPresetNoNotSelf (Long id, Long baseSensorId, String presetNo)

5. A List object gets a collection of attributes

List presetNos = baseRuleboundDTOList.stream () .map (BaseRuleboundDTO:: getPresetNo) .distinct () .collect (Collectors.toList ())

This is the end of "how to implement array object filtering". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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