stream的tomap

stream的toMap方法可以用于将流中的元素映射为Map。根据引用，toMap方法有四个参数：keyMapper、valueMapper、mergeFunction和mapSupplier。keyMapper用于将元素映射为键，valueMapper用于将元素映射为值。当键冲突时，mergeFunction定义了如何合并值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* [java8的stream中的toMap](https://blog.csdn.net/qq_41434612/article/details/108518716)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
- *3* [记：stream流中toMap()使用](https://blog.csdn.net/Airuiliya520/article/details/125426147)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
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