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);//-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
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();
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