有什么方法可以改进Grails 4JSON转换器处理LocalDate对象的方式吗？

import grails.converters.JSON
import grails.web.converters.converters.JsonConverter

class LocalDateJsonConverter extends JsonConverter {
    boolean canConvert(Object object) {
        object instanceof LocalDate
    }

    void marshall(Object value, JSON json) {
        json.value(value.toString())
    }
}

import com.example.LocalDateJsonConverter

beans = {
    jsonConverter(LocalDateJsonConverter)
}

import grails.converters.JSON

class MyController {
    @JSON(converters = LocalDateJsonConverter)
    def action() {
        LocalDate localDate = LocalDate.now()
        render localDate as JSON
    }
}