摘要:
List<String> strs = Arrays.asList("aaa", "bbb", "ccc", "ddd"); String listToStr= strs.stream().collect(Collectors.joining(",")); 参考: https://blog.csdn 阅读全文
posted @ 2021-11-23 17:32
northli
阅读(960)
评论(0)
推荐(0)
摘要:
一、String list中是否有重复元素 public static void main(String[] args) { List<String> stringList=new ArrayList<>(Arrays.asList("a","a","b","c")); long count = s 阅读全文
posted @ 2021-11-23 17:18
northli
阅读(2235)
评论(0)
推荐(0)
摘要:
sql中的having表示对查询结果之后的过滤,下面的例子是对group by之后的结果进行过滤 SELECT DISTINCT(dz_code) from zb_tech_info_collect_unitwhereszjd = '20212'and ssfd_id in (select dept 阅读全文
posted @ 2021-11-23 09:45
northli
阅读(260)
评论(0)
推荐(0)
摘要:
用处,意义,价值,意思,,,是同义词 阅读全文
posted @ 2021-11-23 09:44
northli
阅读(22)
评论(0)
推荐(0)

浙公网安备 33010602011771号