通用字符串时间转LocalDateTime对象的例子

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;

public class DateTimeParsingExample {
    public static void main(String[] args) {
        String[] dateTimeStrings = {
                "2023-11-30",
                "2023-11-30T00:00",
                "2023-11-30T09:00",
                "2023-11-30T15:13",
                "2023-11-30T15:13:11"
        };

        for (String dateTimeString : dateTimeStrings) {
            try {
                LocalDateTime parsedDateTime = tryParseDateTime(dateTimeString);
                System.out.println("正确: " + parsedDateTime);
            } catch (DateTimeParseException e) {
                System.out.println("错误: " + dateTimeString);
            }
        }
    }

    private static LocalDateTime tryParseDateTime(String dateTimeString) {
        DateTimeFormatter timeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd['T'HH:mm[:ss]]");

        try {
            // 尝试解析带有时间的格式
            return LocalDateTime.parse(dateTimeString, timeFormatter);
        } catch (DateTimeParseException e) {
            // 解析失败，尝试解析不带时间的格式
            DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
            return LocalDateTime.of(LocalDate.parse(dateTimeString, dateFormatter), LocalTime.MIDNIGHT);
        }
    }
}