我正在尝试使用扫描器将字符串(11:23)解析为LocalDateTime,但是我收到了异常:无法解析文本'11:23':无法从TemporalAccessor:{}获得LocalDateTime,ISO已解析为java.time.format.Parsed类型的11:23
Scanner scanner = new Scanner(System.in);
String timeGivenByUserString;
DateTimeFormatter timeFormatter = DateTimeFormatter.ofPattern("HH:mm");
System.out.println("Type the time HH:mm");
try {
do {
timeGivenByUserString = scanner.nextLine();
} while (!timeGivenByUserString.matches("\\d{2}:\\d{2}"));
LocalDateTime timeGivenByUser = LocalDateTime.parse(timeGivenByUserString, timeFormatter);
System.out.println(timeGivenByUser.format(timeFormatter));
} catch (DateTimeParseException e) {
System.out.println(e.getMessage());
}
我也创建了类似的方法,并且效果很好:
private static void askAboutDate() {
Scanner scanner = new Scanner(System.in);
String dateGivenByUserString;
DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");
System.out.println("Type the date dd.MM.yyyy");
try {
do {
dateGivenByUserString = scanner.nextLine();
} while (!dateGivenByUserString.matches("\\d{2}.\\d{2}.\\d{4}"));
LocalDate dateGivenByUser = LocalDate.parse(dateGivenByUserString, dateFormatter);
System.out.println(dateGivenByUser.format(dateFormatter));
} catch (DateTimeParseException e) {
System.out.println(e.getMessage());
}
}
解决方案:将LocalDateTime更改为LocalTime
Scanner scanner = new Scanner(System.in);
String timeGivenByUserString;
DateTimeFormatter timeFormatter = DateTimeFormatter.ofPattern("HH:mm");
System.out.println("Type the time HH:mm");
try {
do {
timeGivenByUserString = scanner.nextLine();
} while (!timeGivenByUserString.matches("\\d{2}:\\d{2}"));
LocalTime timeGivenByUser = LocalTime.parse(timeGivenByUserString, timeFormatter);
System.out.println(timeGivenByUser.format(timeFormatter));
} catch (DateTimeParseException e) {
System.out.println(e.getMessage());
}