kotlin 时间转化 & 比较
2020-04-25 本文已影响0人
ithankzc
示例运行于 2020 年 4 月 25 日
DateTimeFormatter 时间转换
localDate to String
val date = LocalDate.now()
val fmt = DateTimeFormatter.ofPattern("yyyy-MM-dd")
val dateStr = date.format(fmt)
println(dateStr) // 2020-04-25
String to LocalDate
val str = "2019-01-01"
val fmt = DateTimeFormatter.ofPattern("yyyy-MM-dd")
val parsedDate = LocalDate.parse(str, fmt)
println(parsedDate) // 1546300800
时间比较
isBefore, isAfter, isEqual
获取系统当前日期，和某个时间【字符串】
val date = LocalDate.now()
val fmt = DateTimeFormatter.ofPattern("yyyy-MM-dd")
val str0424 = "2019-04-24"
val parsedDate0424 = LocalDate.parse(str0424, fmt)
val result = date.isAfter(parsedDate0424)
println(result) // true
>,<,= 比较
val date = LocalDate.now()
val fmt = DateTimeFormatter.ofPattern("yyyy-MM-dd")
val str0424 = "2019-04-24"
val parsedDate0424 = LocalDate.parse(str0424, fmt)
val result = date.isAfter(parsedDate0424)
println(date < parsedDate0424) // false
println(date == parsedDate0424) // false
println(date > parsedDate0424) // true
文档参考
https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html
