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Java 8 Date & Time

java.util.Date <-> LocalDate/LocalDateTime/Instant간 변환

datetime - Convert java.util.Date to java.time.LocalDate] <code java> /** * Calls {@link #asLocalDate(Date, ZoneId)} with the system default time zone. */ public static LocalDate asLocalDate(java.util.Date date) { return asLocalDate(date, ZoneId.systemDefault()); } /** * Creates {@link LocalDate} from {@code java.util.Date} or it's subclasses. Null-safe. */ public static LocalDate asLocalDate(java.util.Date date, ZoneId zone) { if (date == null) return null; if (date instanceof java.sql.Date) { return ((java.sql.Date) date).toLocalDate(); } else { return Instant.ofEpochMilli(date.getTime()).atZone(zone).toLocalDate(); } } /** * Calls {@link #asLocalDateTime(Date, ZoneId)} with the system default time zone. */ public static LocalDateTime asLocalDateTime(java.util.Date date) { return asLocalDateTime(date, ZoneId.systemDefault()); } /** * Creates {@link LocalDateTime} from {@code java.util.Date} or it's subclasses. Null-safe. */ public static LocalDateTime asLocalDateTime(java.util.Date date, ZoneId zone) { if (date == null) return null; if (date instanceof java.sql.Timestamp) return ((java.sql.Timestamp) date).toLocalDateTime(); else return Instant.ofEpochMilli(date.getTime()).atZone(zone).toLocalDateTime(); } /** * Calls {@link #asUtilDate(Object, ZoneId)} with the system default time zone. */ public static java.util.Date asUtilDate(Object date) { return asUtilDate(date, ZoneId.systemDefault()); } /** * Creates a {@link java.util.Date} from various date objects. Is null-safe. Currently supports:<ul> * <li>{@link java.util.Date} * <li>{@link java.sql.Date} * <li>{@link java.sql.Timestamp} * <li>{@link java.time.LocalDate} * <li>{@link java.time.LocalDateTime} * <li>{@link java.time.ZonedDateTime} * <li>{@link java.time.Instant} * </ul> * * @param zone Time zone, used only if the input object is LocalDate or LocalDateTime. * * @return {@link java.util.Date} (exactly this class, not a subclass, such as java.sql.Date) */ public static java.util.Date asUtilDate(Object date, ZoneId zone) { if (date == null) return null; if (date instanceof java.sql.Date || date instanceof java.sql.Timestamp) return new java.util.Date(((java.util.Date) date).getTime()); if (date instanceof java.util.Date) return (java.util.Date) date; if (date instanceof LocalDate) return java.util.Date.from(((LocalDate) date).atStartOfDay(zone).toInstant()); if (date instanceof LocalDateTime) return java.util.Date.from(((LocalDateTime) date).atZone(zone).toInstant()); if (date instanceof ZonedDateTime) return java.util.Date.from(((ZonedDateTime) date).toInstant()); if (date instanceof Instant) return java.util.Date.from((Instant) date); throw new UnsupportedOperationException("Don't know hot to convert " + date.getClass().getName() + " to java.util.Date"); } /** * Creates an {@link Instant} from {@code java.util.Date} or it's subclasses. Null-safe. */ public static Instant asInstant(Date date) { if (date == null) { return null; } else { return Instant.ofEpochMilli(date.getTime()); } } /** * Calls {@link #asZonedDateTime(Date, ZoneId)} with the system default time zone. */ public static ZonedDateTime asZonedDateTime(Date date) { return asZonedDateTime(date, ZoneId.systemDefault()); } /** * Creates {@link ZonedDateTime} from {@code java.util.Date} or it's subclasses. Null-safe. */ public static ZonedDateTime asZonedDateTime(Date date, ZoneId zone) { if (date == null) { return null; } else { return asInstant(date).atZone(zone); } } </code> ===== Time Mocking for test ===== * refer to [[http://docs.oracle.com/javase/8/docs/api/java/time/Clock.html|java.time.Clock
Ad-Hockery - Fixing current time for tests with Java 8's date/time API

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Java 8 Date & Time

java.util.Date <-> LocalDate/LocalDateTime/Instant간 변환

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사이드바

Java 8 Date & Time

java.util.Date <-> LocalDate/LocalDateTime/Instant간 변환

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