关于JDK8对LIST转MAP，MAP再转LIST，并防止排序错乱问题（严格控制以查询出来的数据某一字段排序）

Love丶TG

于 2019-09-11 10:29:03 发布

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分类专栏： java web

本文链接：https://blog.youkuaiyun.com/qq_20696007/article/details/100728871

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废话不多说直接上图...

list转map再转list代码如下：

List<MeetDetailsEntity> details = thisDao.queryMeetingDetails(map);
if (details != null && details.size() > 0) {
    Map<String, List<MeetDetailsEntity>> collect = details.stream().collect(Collectors.groupingBy(MeetDetailsEntity::getTypeName));
    /// 博文参考 https://blog.youkuaiyun.com/qq_34144916/article/details/81154528 
    /// List<String> keys = new LinkedList<>();
    /// List<MeetingDetailsVO> values = new LinkedList<>();
    List<String> keys = new ArrayList<>(collect.size());
    List<MeetingDetailsVO> values = new ArrayList<>(collect.size());
    details.forEach(res -> {
        boolean b = keys.stream().anyMatch(u -> u.equ

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