用j2ee作的网站,it培训网,做外贸比较好的网站有哪些,家装设计师自学攻略java----js常用的api 时间函数获取当前时间: DateUtil.today()时间偏移字符换时间格式化 map.computeIfAbsent添加list 时间函数
获取当前时间: DateUtil.today()
String todayDateUtil.today()String today “2024-02-01”;
时间偏移
往前30天
DateTime parseDateUtil.o… java----js常用的api 时间函数获取当前时间: DateUtil.today()时间偏移字符换时间格式化 map.computeIfAbsent添加list 时间函数
获取当前时间: DateUtil.today()
String todayDateUtil.today()String today “2024-02-01”;
时间偏移
往前30天
DateTime parseDateUtil.offsetDay(DateUtil.parse(DateUtil.today()), -30)String today DateUtil.formatDate(DateUtil.offsetDay(DateUtil.parse(DateUtil.today()), -45));字符换时间格式化
DateTime parse DateUtil.parse(DateUtil.today());String today DateUtil.formatDate(parse)map.computeIfAbsent添加list
postIdMap.computeIfAbsent(dingDaykey.getPostId(), k - new LinkedList()).add(dingDaykey);优化前
DayEntity dayEntity lkeyMap.get(line);
if (dayEntity null) {dayEntity new DayEntity();
}
dayEntity.setName(line);优化后
DayEntity dayEntity lkeyMap.computeIfAbsent(line, DayEntity::new);优化前 ListDataListMxfEntity data dayEntity.getData();if (data null) {data new ArrayList();}优化后
ListDataListMxfEntity data Optional.ofNullable(dayEntity.getData()).orElseGet(ArrayList::new);优化前 LinkedListDingDaykey dingDaykeys1 postIdMap.get(postId);if (dingDaykeys1 ! null) {gwDingRounddotMap.computeIfAbsent(onlyId, k - new LinkedList()).addAll(dingDaykeys1);}优化后
gwDingRounddotMap.computeIfAbsent(onlyId, k - dingDaykeys1 ! null ? new LinkedList(dingDaykeys1) : new LinkedList());
