很想要用Java的时间api，但有时候还是需要转换为Date. 二者的相互转换并不是一步到位那么简单，所以，还是需要记录一下转换的api
Date to LocalDateTime
Date todayDate = new Date();
LocalDateTime ldt = todayDate.toInstant()
.atZone( ZoneId.systemDefault() )
.toLocalDateTime();
System.out.println(ldt);
//2019-05-16T19:22:12.773
LocalDateTime to Date
LocalDateTime localDateTime = LocalDateTime.now();
Date date = Date.from( localDateTime.atZone( ZoneId.systemDefault()).toInstant());
System.out.println(date);
//Thu May 16 19:22:37 CST 2019
DateUtils
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;
public class DateUtils {
public static Date asDate(LocalDate localDate) {
return Date.from(localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());
}
public static Date asDate(LocalDateTime localDateTime) {
return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
}
public static LocalDate asLocalDate(Date date) {
return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDate();
}
public static LocalDateTime asLocalDateTime(Date date) {
return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDateTime();
}
}