@Override
public FormattingConversionService mvcConversionService() {
FormattingConversionService formattingConversionService = super.mvcConversionService();
if(env.getProperty("input.trimToNull", Boolean.class, Boolean.TRUE)){
formattingConversionService.addConverter(new Converter<String, String>() {
public String convert(String source) { return StringUtils.trimToNull(source); }});
}
return formattingConversionService;
}