LocalDateTime 解析为纪元秒

Question

我正在尝试将以下形式的字符串 2010-10-12-18-43-55 解析为当前时区纪元以来的秒数。这是我试过的

DateTimeFormatter dateTimeFormatter = 
          DateTimeFormatter.ofPattern("yyyy-MM-dd-HH-mm-ss");

我.

String datatetime = "2010-10-12-18-43-55";
Instant.parse(datetime).toEpochMilli; 
//Throws 
//java.time.format.DateTimeParseException: 
//Text '2010-10-12-18-43-55' could not be parsed at index 10

二.

String datatetime = "2010-10-12-18-43-55";
Instant.from(LocalDateTime.parse(datetime, dateTimeFormatter)).toEpochMilli
//Throws 
//java.time.DateTimeException: Unable to obtain Instant from 
//TemporalAccessor: 2010-10-12T18:43:55 of type 
//java.time.LocalDateTime type java.time.LocalDateTime

三.

String datatetime = "2010-10-12-18-43-55";
Instant.from(dateTimeFormatter.parse(datetime, new ParsePosition(0))).toEpochMilli
//Throws 
//java.time.DateTimeException: Unable to obtain Instant from 
//TemporalAccessor: {},ISO resolved to 2010-10-12T18:43:55 
//of type java.time.format.Parsed

有人可以帮我解决这个任务吗？

Answer 1

从 Instant javadocs 开始，String 必须采用 2007-12-03T10:15:30.00Z.
String 无法解析为 Instant，因为缺少时区。试试这个： ZonedDateTime zonedDateTime = ZonedDateTime.of(localDateTime, ZoneId.systemDefault());
我不确定你想做什么。

LocalDateTime 解析为纪元秒

LocalDateTime parse to epoch seconds

java

java-8

localdate