Java LocalDateTime 和 Date 互转

1 LocalDateTime -> Date2 Date -> LocalDateTime3 str -> LocalDateTime4 LocalDateTime -> str

1 LocalDateTime -> Date

@Testpublic void test() {// DateTimeFormatter / SimpleDateFormatDateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// LocalDateTime -> DateLocalDateTime time1 = LocalDateTime.now();Date date = Date.from(time1.atZone(ZoneId.systemDefault()).toInstant());// PrintSystem.out.println(format.format(date));}

-04-13 16:01:42

2 Date -> LocalDateTime

@Testpublic void test() {// DateTimeFormatter / SimpleDateFormatDateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// Date -> LocalDateTimeLocalDateTime time2 = new Date().toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();// PrintSystem.out.println(formatter.format(time2));}

-04-13 16:01:42

3 str -> LocalDateTime

@Testpublic void test() {// DateTimeFormatterDateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss", Locale.US);// str -> LocalDateTimeLocalDateTime time2 = LocalDateTime.parse("-04-13 16:01:42", formatter);// PrintSystem.out.println(formatter.format(time2));}

-04-13 16:01:42

4 LocalDateTime -> str

@Testpublic void test() {// DateTimeFormatterDateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss", Locale.US);// LocalDateTimeLocalDateTime time2 = LocalDateTime.now();// PrintSystem.out.println(formatter.format(time2));}

-04-13 16:01:42

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