LocalDateTime、LocalDate、Date 轉為 String

LocalDateTime、LocalDate、Date 轉為 String

上篇博客中，介紹了 LocalDateTime、LocalDate 及 Date 的相互轉換，另外的場景就是需要把 LocalDateTime、LocalDate 或者是 Date與 String 字符串進行轉換。

LocalDateTime、LocalDate、Date 轉String

//Date轉String
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String dateString = sdf.format(date);

//LocalDateTime轉String
LocalDateTime localDateTime = LocalDateTime.now();
DateTimeFormatter dtf1 = DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm:ss");
String localDateTimeString = dtf1.format(localDateTime);

//LocalDate轉String
LocalDate localDate = LocalDate.now();
DateTimeFormatter dtf2 = DateTimeFormatter.ofPattern("yyyy-MM-dd");
String localDateString = dtf2.format(localDate);

String 轉 Date、LocalDateTime、LocalDate

//String轉Date
String dateString = "2020-10-27 14:53:00";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
Date date = sdf.parse(dateString);

//String轉LocalDateTime
String localDateTimeString = "2020-10-27 18:15:00";
DateTimeFormatter dtf1 = ofPattern("yyyy-MM-dd hh:mm:ss");
LocalDateTime localDateTime = LocalDateTime.parse(localDateTimeString, dtf1);

//String轉LocalDate
String localDateString = "2020-10-27";
DateTimeFormatter dtf2 = ofPattern("yyyy-MM-dd");
LocalDate localDate = LocalDate.parse(localDateString, dtf2);