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javaでよく使う日時フォーマットパターン

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import java.time.format.DateTimeFormatter;

public class DateTimeFormats {
    // 年月日(例: 2024年10月21日)
    public static final DateTimeFormatter YYYY_MM_DD_JP = DateTimeFormatter.ofPattern("yyyy年MM月dd日");

    // 年月日(スラッシュ区切り、例: 2024/10/21)
    public static final DateTimeFormatter YYYY_MM_DD_SLASH = DateTimeFormatter.ofPattern("yyyy/MM/dd");

    // 年月日(ハイフン区切り、例: 2024-10-21)
    public static final DateTimeFormatter YYYY_MM_DD_HYPHEN = DateTimeFormatter.ofPattern("yyyy-MM-dd");

    // 年月日時分秒(例: 2024年10月21日 15時30分45秒)
    public static final DateTimeFormatter YYYY_MM_DD_HH_MM_SS_JP = DateTimeFormatter.ofPattern("yyyy年MM月dd日 HH時mm分ss秒");

    // 年月日 時間(例: 2024/10/21 15:30:45)
    public static final DateTimeFormatter YYYY_MM_DD_HH_MM_SS_SLASH = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");

    // 年月日 時間(ハイフン区切り、例: 2024-10-21 15:30:45)
    public static final DateTimeFormatter YYYY_MM_DD_HH_MM_SS_HYPHEN = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    // ISO標準形式(例: 2024-10-21T15:30:45)
    public static final DateTimeFormatter ISO_DATE_TIME = DateTimeFormatter.ISO_LOCAL_DATE_TIME;

    // 年月のみ(例: 2024年10月)
    public static final DateTimeFormatter YYYY_MM_JP = DateTimeFormatter.ofPattern("yyyy年MM月");

    // 月日(例: 10月21日)
    public static final DateTimeFormatter MM_DD_JP = DateTimeFormatter.ofPattern("MM月dd日");

    // 時分秒(例: 15:30:45)
    public static final DateTimeFormatter HH_MM_SS = DateTimeFormatter.ofPattern("HH:mm:ss");
}
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