如何使用bootstrap实现年月日的时间选择

<script type="text/javascript">
$('.form_datetime').datetimepicker({
    language:  'zh-CN',
    minView: 4,         format: 'yyyy',
    startDate:2019,
    autoclose: 1,
    startView: 4,
});
</script>

<script type="text/javascript">
$('.form_datetime').datetimepicker({
    format: 'mm',
    autoclose:true,
    startView:3,
    minView:3,
    maxView:3,
    initialDate:new Date(),
    language:'zh-CN'
});
</script>

<script type="text/javascript">
$('.form_datetime').datetimepicker({
     format: 'yyyymmdd',
     weekStart: 1,
     autoclose: true,
     startView: 2,
     minView: 2,
    language:'zh-CN'
});
</script>