Collectors.groupingBy分组后返回list集合
时间: 2023-10-15 22:26:45 浏览: 120
java8 集合 多字段 分组 统计个数代码
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Collectors.groupingBy默认情况下分组后返回的是HashMap类型的集合。通过修改为LinkedHashMap类型即可返回LinkedHashMap集合。这样可以保持分组后的顺序不发生乱序。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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