importjava.time.LocalDateTime;importjava.time.format.DateTimeFormatter;publicclassCustomDateFormatter{publicstaticvoidmain(String[]args){// 创建一个指定日期时间LocalDateTimespecificDate=LocalDateTime.of(2023,10,15,14,30,45);// 定义“ymdHis”格式DateTimeFormatterformatter=DateTimeFormatter.ofPattern("yyyy-MM-dd...