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Support parsing long millisecond timestamps in InstantFormatter

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This commit adds support of parsing a simple long from a String and
turning it to an `Instant` by considering it represents a timestamp in
milliseconds (see `Instant.ofEpochMilli`). Failing to parse a long from
the String, the previous algorithm is used: first check for an RFC-1123
representation then an ISO_INSTANT representation.

See gh-30312
Closes gh-30546
This commit is contained in:
Remus Richard Dumitrache
2023-05-26 12:08:26 +02:00
committed by GitHub
parent 7150c23e93
commit 4d8f6c1b41
3 changed files with 49 additions and 6 deletions
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17
spring-context/src/main/java/org/springframework/format/datetime/standard/InstantFormatter.java
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@@ -41,13 +41,18 @@ public class InstantFormatter implements Formatter<Instant> {
@Override
public Instant parse(String text, Locale locale) throws ParseException {
if (text.length() > 0 && Character.isAlphabetic(text.charAt(0))) {
// assuming RFC-1123 value a la "Tue, 3 Jun 2008 11:05:30 GMT"
return Instant.from(DateTimeFormatter.RFC_1123_DATE_TIME.parse(text));
try {
return Instant.ofEpochMilli(Long.parseLong(text));
}
else {
// assuming UTC instant a la "2007-12-03T10:15:30.00Z"
return Instant.parse(text);
catch (NumberFormatException ex) {
if (text.length() > 0 && Character.isAlphabetic(text.charAt(0))) {
// assuming RFC-1123 value a la "Tue, 3 Jun 2008 11:05:30 GMT"
return Instant.from(DateTimeFormatter.RFC_1123_DATE_TIME.parse(text));
}
else {
// assuming UTC instant a la "2007-12-03T10:15:30.00Z"
return Instant.parse(text);
}
}
}