Date日期类型显示{object Object}问题处理

function dateToStr (date0) {
    var date = new Date(date0.time);
    var year = date.getFullYear();
    var month = date.getMonth() + 1;
    var day = date.getDate();
    var hour = date.getHours();
    var min = date.getMinutes();
    var sec = date.getSeconds();
    if (month >= 1 && month <= 9) {
        month = '0' + month
    }
    if (day >= 0 && day <= 9) {
        day = '0' + day
    }
    if (hour >= 0 && hour <= 9) {
        hour = '0' + hour
    }
    if (min >= 0 && min <= 9) {
        min = '0' + min
    }
    if (sec >= 0 && sec <= 9) {
        sec = '0' + sec
    }
    var str = year + "-" + month + "-" + day + " " + hour + ":" + min + ":" + sec;
    return str;
}