gatherInfos.stream().collect(Collectors.groupingBy(item -> item.getGroupByCode()));
时间: 2024-04-25 19:25:31 浏览: 92
这段代码使用了Java 8中的Stream流来对gatherInfos进行分组操作,根据item的groupByCode属性进行分组。具体的代码如下所示:
```java
gatherInfos.stream().collect(Collectors.groupingBy(item -> item.getGroupByCode()));
```
这段代码将gatherInfos按照groupByCode属性进行分组,并返回一个Map对象,其中key是groupByCode的值,value是对应的gatherInfos列表。这样可以方便地根据groupByCode进行数据的分组和聚合操作。
#### 引用[.reference_title]
- *1* [Stream——采取collect进行数据Collectors.groupingBy数据分组](https://blog.csdn.net/qq_38322527/article/details/125317779)[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^v91^insert_down28v1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [Stream之Collectors.groupingBy(分组)的使用](https://blog.csdn.net/m0_46434219/article/details/109068536)[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^v91^insert_down28v1,239^v3^insert_chatgpt"}} ] [.reference_item]
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