如何在Grails中将特定日期格式作为JSON返回？

class DateFormatter {
    static formatDate(Date date, String format) {
        SimpleDateFormat sdf = new SimpleDateFormat(format)
        return sdf.format(date)
    }
}

grails:
    dateFormat: "yyyy-MM-dd HH:mm:ss"

import DateFormatter

def getDate() {
    Date date = new Date()
    String formattedDate = DateFormatter.formatDate(date, grailsApplication.config.grails.dateFormat)
    render([date: formattedDate] as JSON)
}

{
    "date": "${date}"
}

def getDate() {
    Date date = new Date()
    String formattedDate = DateFormatter.formatDate(date, grailsApplication.config.grails.dateFormat)
    render(view: "date", model: [date: formattedDate])
}