Use stream to group the list collection into a collection of Map<String, List<T>> according to a certain field - Code World

Use stream to group the list collection into a collection of Map<String, List<T>> according to a certain field

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Origin blog.csdn.net/weixin_44215804/article/details/109995738

Use stream to group the list collection into a collection of Map<String, List<T>> according to a certain field

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