Java 8 中 LocalDate 与Date 互相转换

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// 01. java.util.Date –> java.time.LocalDateTime
public void UDateToLocalDateTime() {

java.util.Date date = new java.util.Date();
Instant instant = date.toInstant();
ZoneId zone = ZoneId.systemDefault();
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
}

// 02. java.util.Date –> java.time.LocalDate
public void UDateToLocalDate() {

java.util.Date date = new java.util.Date();
Instant instant = date.toInstant();
ZoneId zone = ZoneId.systemDefault();
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
LocalDate localDate = localDateTime.toLocalDate();
}

// 03. java.util.Date –> java.time.LocalTime
public void UDateToLocalTime() {

java.util.Date date = new java.util.Date();
Instant instant = date.toInstant();
ZoneId zone = ZoneId.systemDefault();
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
LocalTime localTime = localDateTime.toLocalTime();
}

// 04. java.time.LocalDateTime –> java.util.Date
public void LocalDateTimeToUdate() {

LocalDateTime localDateTime = LocalDateTime.now();
ZoneId zone = ZoneId.systemDefault();
Instant instant = localDateTime.atZone(zone).toInstant();
java.util.Date date = Date.from(instant);
}

// 05. java.time.LocalDate –> java.util.Date
public void LocalDateToUdate() {

LocalDate localDate = LocalDate.now();
ZoneId zone = ZoneId.systemDefault();
Instant instant = localDate.atStartOfDay().atZone(zone).toInstant();
java.util.Date date = Date.from(instant);
}

// 06. java.time.LocalTime –> java.util.Date
public void LocalTimeToUdate() {

LocalTime localTime = LocalTime.now();
LocalDate localDate = LocalDate.now();
LocalDateTime localDateTime = LocalDateTime.of(localDate, localTime);
ZoneId zone = ZoneId.systemDefault();
Instant instant = localDateTime.atZone(zone).toInstant();
java.util.Date date = Date.from(instant);
}