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Default fallback parsing for UTC without milliseconds 

Closes gh-32856
This commit is contained in:
Juergen Hoeller 2024-05-21 17:39:06 +02:00
parent 65e1337d35
commit fee17e11ba
2 changed files with 54 additions and 12 deletions
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33
spring-context/src/main/java/org/springframework/format/datetime/DateFormatter.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2002-2023 the original author or authors.
* Copyright 2002-2024 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -22,8 +22,10 @@ import java.text.SimpleDateFormat;
import java.util.Collections;
import java.util.Date;
import java.util.EnumMap;
import java.util.LinkedHashSet;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.TimeZone;
import org.springframework.format.Formatter;
@ -35,9 +37,14 @@ import org.springframework.util.StringUtils;
/**
* A formatter for {@link java.util.Date} types.
*
* <p>Supports the configuration of an explicit date time pattern, timezone,
* locale, and fallback date time patterns for lenient parsing.
*
* <p>Common ISO patterns for UTC instants are applied at millisecond precision.
* Note that {@link org.springframework.format.datetime.standard.InstantFormatter}
* is recommended for flexible UTC parsing into a {@link java.time.Instant} instead.
*
* @author Keith Donald
* @author Juergen Hoeller
* @author Phillip Webb
@ -49,15 +56,23 @@ public class DateFormatter implements Formatter<Date> {
private static final TimeZone UTC = TimeZone.getTimeZone("UTC");
// We use an EnumMap instead of Map.of(...) since the former provides better performance.
private static final Map<ISO, String> ISO_PATTERNS;
private static final Map<ISO, String> ISO_FALLBACK_PATTERNS;
static {
// We use an EnumMap instead of Map.of(...) since the former provides better performance.
Map<ISO, String> formats = new EnumMap<>(ISO.class);
formats.put(ISO.DATE, "yyyy-MM-dd");
formats.put(ISO.TIME, "HH:mm:ss.SSSXXX");
formats.put(ISO.DATE_TIME, "yyyy-MM-dd'T'HH:mm:ss.SSSXXX");
ISO_PATTERNS = Collections.unmodifiableMap(formats);
// Fallback format for the time part without milliseconds.
Map<ISO, String> fallbackFormats = new EnumMap<>(ISO.class);
fallbackFormats.put(ISO.TIME, "HH:mm:ssXXX");
fallbackFormats.put(ISO.DATE_TIME, "yyyy-MM-dd'T'HH:mm:ssXXX");
ISO_FALLBACK_PATTERNS = Collections.unmodifiableMap(fallbackFormats);
}
@ -202,8 +217,16 @@ public class DateFormatter implements Formatter<Date> {
return getDateFormat(locale).parse(text);
}
catch (ParseException ex) {
Set<String> fallbackPatterns = new LinkedHashSet<>();
String isoPattern = ISO_FALLBACK_PATTERNS.get(this.iso);
if (isoPattern != null) {
fallbackPatterns.add(isoPattern);
}
if (!ObjectUtils.isEmpty(this.fallbackPatterns)) {
for (String pattern : this.fallbackPatterns) {
Collections.addAll(fallbackPatterns, this.fallbackPatterns);
}
if (!fallbackPatterns.isEmpty()) {
for (String pattern : fallbackPatterns) {
try {
DateFormat dateFormat = configureDateFormat(new SimpleDateFormat(pattern, locale));
// Align timezone for parsing format with printing format if ISO is set.
@ -221,8 +244,8 @@ public class DateFormatter implements Formatter<Date> {
}
if (this.source != null) {
ParseException parseException = new ParseException(
String.format("Unable to parse date time value \"%s\" using configuration from %s", text, this.source),
ex.getErrorOffset());
String.format("Unable to parse date time value \"%s\" using configuration from %s", text, this.source),
ex.getErrorOffset());
parseException.initCause(ex);
throw parseException;
}

33
spring-context/src/test/java/org/springframework/format/datetime/DateFormatterTests.java
View File

@ -35,6 +35,7 @@ import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
*
* @author Keith Donald
* @author Phillip Webb
* @author Juergen Hoeller
*/
class DateFormatterTests {
@ -45,6 +46,7 @@ class DateFormatterTests {
void shouldPrintAndParseDefault() throws Exception {
DateFormatter formatter = new DateFormatter();
formatter.setTimeZone(UTC);
Date date = getDate(2009, Calendar.JUNE, 1);
assertThat(formatter.print(date, Locale.US)).isEqualTo("Jun 1, 2009");
assertThat(formatter.parse("Jun 1, 2009", Locale.US)).isEqualTo(date);
@ -54,6 +56,7 @@ class DateFormatterTests {
void shouldPrintAndParseFromPattern() throws ParseException {
DateFormatter formatter = new DateFormatter("yyyy-MM-dd");
formatter.setTimeZone(UTC);
Date date = getDate(2009, Calendar.JUNE, 1);
assertThat(formatter.print(date, Locale.US)).isEqualTo("2009-06-01");
assertThat(formatter.parse("2009-06-01", Locale.US)).isEqualTo(date);
@ -64,6 +67,7 @@ class DateFormatterTests {
DateFormatter formatter = new DateFormatter();
formatter.setTimeZone(UTC);
formatter.setStyle(DateFormat.SHORT);
Date date = getDate(2009, Calendar.JUNE, 1);
assertThat(formatter.print(date, Locale.US)).isEqualTo("6/1/09");
assertThat(formatter.parse("6/1/09", Locale.US)).isEqualTo(date);
@ -74,6 +78,7 @@ class DateFormatterTests {
DateFormatter formatter = new DateFormatter();
formatter.setTimeZone(UTC);
formatter.setStyle(DateFormat.MEDIUM);
Date date = getDate(2009, Calendar.JUNE, 1);
assertThat(formatter.print(date, Locale.US)).isEqualTo("Jun 1, 2009");
assertThat(formatter.parse("Jun 1, 2009", Locale.US)).isEqualTo(date);
@ -84,6 +89,7 @@ class DateFormatterTests {
DateFormatter formatter = new DateFormatter();
formatter.setTimeZone(UTC);
formatter.setStyle(DateFormat.LONG);
Date date = getDate(2009, Calendar.JUNE, 1);
assertThat(formatter.print(date, Locale.US)).isEqualTo("June 1, 2009");
assertThat(formatter.parse("June 1, 2009", Locale.US)).isEqualTo(date);
@ -94,16 +100,18 @@ class DateFormatterTests {
DateFormatter formatter = new DateFormatter();
formatter.setTimeZone(UTC);
formatter.setStyle(DateFormat.FULL);
Date date = getDate(2009, Calendar.JUNE, 1);
assertThat(formatter.print(date, Locale.US)).isEqualTo("Monday, June 1, 2009");
assertThat(formatter.parse("Monday, June 1, 2009", Locale.US)).isEqualTo(date);
}
@Test
void shouldPrintAndParseISODate() throws Exception {
void shouldPrintAndParseIsoDate() throws Exception {
DateFormatter formatter = new DateFormatter();
formatter.setTimeZone(UTC);
formatter.setIso(ISO.DATE);
Date date = getDate(2009, Calendar.JUNE, 1, 14, 23, 5, 3);
assertThat(formatter.print(date, Locale.US)).isEqualTo("2009-06-01");
assertThat(formatter.parse("2009-6-01", Locale.US))
@ -111,33 +119,44 @@ class DateFormatterTests {
}
@Test
void shouldPrintAndParseISOTime() throws Exception {
void shouldPrintAndParseIsoTime() throws Exception {
DateFormatter formatter = new DateFormatter();
formatter.setTimeZone(UTC);
formatter.setIso(ISO.TIME);
Date date = getDate(2009, Calendar.JANUARY, 1, 14, 23, 5, 3);
assertThat(formatter.print(date, Locale.US)).isEqualTo("14:23:05.003Z");
assertThat(formatter.parse("14:23:05.003Z", Locale.US))
.isEqualTo(getDate(1970, Calendar.JANUARY, 1, 14, 23, 5, 3));
date = getDate(2009, Calendar.JANUARY, 1, 14, 23, 5, 0);
assertThat(formatter.print(date, Locale.US)).isEqualTo("14:23:05.000Z");
assertThat(formatter.parse("14:23:05Z", Locale.US))
.isEqualTo(getDate(1970, Calendar.JANUARY, 1, 14, 23, 5, 0).toInstant());
}
@Test
void shouldPrintAndParseISODateTime() throws Exception {
void shouldPrintAndParseIsoDateTime() throws Exception {
DateFormatter formatter = new DateFormatter();
formatter.setTimeZone(UTC);
formatter.setIso(ISO.DATE_TIME);
Date date = getDate(2009, Calendar.JUNE, 1, 14, 23, 5, 3);
assertThat(formatter.print(date, Locale.US)).isEqualTo("2009-06-01T14:23:05.003Z");
assertThat(formatter.parse("2009-06-01T14:23:05.003Z", Locale.US)).isEqualTo(date);
date = getDate(2009, Calendar.JUNE, 1, 14, 23, 5, 0);
assertThat(formatter.print(date, Locale.US)).isEqualTo("2009-06-01T14:23:05.000Z");
assertThat(formatter.parse("2009-06-01T14:23:05Z", Locale.US)).isEqualTo(date.toInstant());
}
@Test
void shouldThrowOnUnsupportedStylePattern() {
DateFormatter formatter = new DateFormatter();
formatter.setStylePattern("OO");
assertThatIllegalStateException().isThrownBy(() ->
formatter.parse("2009", Locale.US))
.withMessageContaining("Unsupported style pattern 'OO'");
assertThatIllegalStateException().isThrownBy(() -> formatter.parse("2009", Locale.US))
.withMessageContaining("Unsupported style pattern 'OO'");
}
@Test
@ -148,8 +167,8 @@ class DateFormatterTests {
formatter.setStylePattern("L-");
formatter.setIso(ISO.DATE_TIME);
formatter.setPattern("yyyy");
Date date = getDate(2009, Calendar.JUNE, 1, 14, 23, 5, 3);
Date date = getDate(2009, Calendar.JUNE, 1, 14, 23, 5, 3);
assertThat(formatter.print(date, Locale.US)).as("uses pattern").isEqualTo("2009");
formatter.setPattern("");