配置全局日期和时间格式

@Configuration
public class AppConfig {

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

                return conversionService;
        }

}感谢spring提供的强大的功能，代码在于积累。