Problem

When using a date parameter in a API call with a Swagger generated Controller interface I noticed some problems concerning the date format.

I was struggling to find a solution to receive the dates without adding the @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) annotation to the date parameter, which defeats the purpose of using generated code.

Solution

The solution I found here is to add a formatter to a WebMvcConfigurer class.

Example:

@Configuration
public class RestConfiguration extends WebMvcConfigurerAdapter {

    @Override
    public void addFormatters(FormatterRegistry registry) {
        DateTimeFormatterRegistrar registrar = new DateTimeFormatterRegistrar();
        registrar.setUseIsoFormat(true);
        registrar.registerFormatters(registry);
    }
}