Grails中的自定义标记库不起作用

Question

我是grails的新手，并尝试学习grails。我做了很多谷歌搜索，但无法找到原因，请帮忙。必要的代码如下： 控制器：

class TagLibTestController {
def dateTest() {
    def Date date=new Date()
    date.setTime(1379874600000)
    render date
 }
}

的TagLib：

 class DateTagLib {
def dateFromNow = { attrs,body ->
    def date = attrs.date1
    println "DateTagLib"
    def niceDate = getNiceDate(date)
    out << niceDate
}

 String getNiceDate(Date date) {
    def now = new Date()
    def diff = Math.abs(now.time - date.time)
    final long second = 1000
    final long minute = second * 60
    final long hour = minute * 60
    final long day = hour * 24
    def niceTime = ""
    long calc = 0;
    calc = Math.floor(diff / day)
    if (calc) {
    niceTime += calc + " day" + (calc > 1 ? "s " : " ")
    diff %= day
    }
    calc = Math.floor(diff / hour)
    if (calc) {
    niceTime += calc + " hour" + (calc > 1 ? "s " : " ")
    diff %= hour
    }
    calc = Math.floor(diff / minute)
    if (calc) {
    niceTime += calc + " minute" + (calc > 1 ? "s " : " ")
    diff %= minute
    }
    if (!niceTime) {
    niceTime = "Right now"
    } else {
    niceTime += (date.time > now.time) ? "from now" : "ago"
    }
    return niceTime
    }
}

GSP页面：

 <g:dateFromNow date1="${date}"/>

我们只获得日期值。 Tag Lib Class甚至不执行任何行。需要更多配置吗？