Configuring a Global Date and Time Format

By default, date and time fields not annotated with @DateTimeFormat are converted from strings by using the DateFormat.SHORT style. If you prefer, you can change this by defining your own global format.spring-doc.cn

To do that, ensure that Spring does not register default formatters. Instead, register formatters manually with the help of:spring-doc.cn

org.springframework.format.datetime.standard.DateTimeFormatterRegistrarspring-doc.cn
org.springframework.format.datetime.DateFormatterRegistrarspring-doc.cn

For example, the following configuration registers a global yyyyMMdd format:spring-doc.cn

@Configuration
public class ApplicationConfiguration {

	@Bean
	public FormattingConversionService conversionService() {

		// Use the DefaultFormattingConversionService but do not register defaults
		DefaultFormattingConversionService conversionService =
				new DefaultFormattingConversionService(false);

		// Ensure @NumberFormat is still supported
		conversionService.addFormatterForFieldAnnotation(
				new NumberFormatAnnotationFormatterFactory());

		// Register JSR-310 date conversion with a specific global format
		DateTimeFormatterRegistrar dateTimeRegistrar = new DateTimeFormatterRegistrar();
		dateTimeRegistrar.setDateFormatter(DateTimeFormatter.ofPattern("yyyyMMdd"));
		dateTimeRegistrar.registerFormatters(conversionService);

		// Register date conversion with a specific global format
		DateFormatterRegistrar dateRegistrar = new DateFormatterRegistrar();
		dateRegistrar.setFormatter(new DateFormatter("yyyyMMdd"));
		dateRegistrar.registerFormatters(conversionService);

		return conversionService;
	}
}

@Configuration
class ApplicationConfiguration {

	@Bean
	fun conversionService(): FormattingConversionService {
		// Use the DefaultFormattingConversionService but do not register defaults
		return DefaultFormattingConversionService(false).apply {

			// Ensure @NumberFormat is still supported
			addFormatterForFieldAnnotation(NumberFormatAnnotationFormatterFactory())

			// Register JSR-310 date conversion with a specific global format
			val dateTimeRegistrar = DateTimeFormatterRegistrar()
			dateTimeRegistrar.setDateFormatter(DateTimeFormatter.ofPattern("yyyyMMdd"))
			dateTimeRegistrar.registerFormatters(this)

			// Register date conversion with a specific global format
			val dateRegistrar = DateFormatterRegistrar()
			dateRegistrar.setFormatter(DateFormatter("yyyyMMdd"))
			dateRegistrar.registerFormatters(this)
		}
	}
}

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
	<property name="registerDefaultFormatters" value="false" />
	<property name="formatters">
		<set>
			<bean class="org.springframework.format.number.NumberFormatAnnotationFormatterFactory" />
		</set>
	</property>
	<property name="formatterRegistrars">
		<set>
			<bean class="org.springframework.format.datetime.standard.DateTimeFormatterRegistrar">
				<property name="dateFormatter">
					<bean class="org.springframework.format.datetime.standard.DateTimeFormatterFactoryBean">
						<property name="pattern" value="yyyyMMdd"/>
					</bean>
				</property>
			</bean>
		</set>
	</property>
</bean>

Note there are extra considerations when configuring date and time formats in web applications. Please see WebMVC Conversion and Formatting or WebFlux Conversion and Formatting.spring-doc.cn