I have a native query which returns a List<Object[]>. I want to convert this List to a Stream<Object>. These Objects are different columns from different ta,java,spring,java-8,java-stream"/>

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I have a native query which returns a List<Object[]>. I want to convert this List to a Stream<Object>. These Objects are different columns from different ta

java - 如何转换列表流式传输

I have a native query which returns a List<Object[]>. I want to convert this List to a Stream<Object>. These Objects are different columns from different ta

问题描述

I have a native query which returns a List<Object[]>. I want to convert this List to a Stream<Object>. These Objects are different columns from different tables of my database.

What is the best solution to do that?

Create a DTO and convert a List<DTO> to Stream<DTO>? How can I do that?

Assuming your DTO class has a proper constructor, you can write something like this:

List<Object[]> input = ...
Stream<DTO> dtos = input.stream().map(arr -> new DTO(arr[0], arr[1], ... , arr[n]);

标签： javaspringjava-8java-stream

解决方案

假设你的DTO类有一个合适的构造函数，你可以这样写：

List<Object[]> input = ...
Stream<DTO> dtos = input.stream().map(arr -> new DTO(arr[0], arr[1], ... , arr[n]);

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