java 新特性LocalDate、LocalDateTime与timestamp、Date的转换

LocalDate nowLocalDate = LocalDate.now();

Date date = Date.from(nowLocalDate.atStartOfDay(ZoneId.systemDefault()).toInstant());

LocalDateTime localDateTime = LocalDateTime.now();

Date date = Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());

 
Date date = new Date();

LocalDateTime localDateTime = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();

LocalDate localDate = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();

LocalDate localDate = LocalDate.now();

long timestamp = localDate.atStartOfDay(ZoneId.systemDefault()).toInstant().toEpochMilli();

LocalDateTime localDateTime = LocalDateTime.now();

long timestamp = localDateTime.toInstant(ZoneOffset.ofHours(8)).toEpochMilli();

long timestamp = System.currentTimeMillis();

LocalDate localDate = 
Instant.ofEpochMilli(timestamp).atZone(ZoneId.systemDefault()).toLocalDate();

LocalDateTime localDateTime =
 Instant.ofEpochMilli(timestamp).atZone(ZoneId.systemDefault()).toLocalDate();