日期字符串 格式化为 日期类型

//日期字符串 格式化为 日期类型
var parseDate = function (str) {
        if (typeof str == 'string') {
            var results = str.match(/^ *(\d{4})-(\d{1,2})-(\d{1,2}) *$/);
            if (results && results.length > 3)
                return new Date(parseInt(results[1], 10), parseInt(results[2], 10) - 1, parseInt(results[3], 10));
            results = str.match(/^ *(\d{4})-(\d{1,2})-(\d{1,2}) +(\d{1,2}):(\d{1,2}) *$/);
            if (results && results.length > 5)
                return new Date(parseInt(results[1], 10), parseInt(results[2], 10) - 1, parseInt(results[3], 10), parseInt(results[4], 10), parseInt(results[5], 10));
            results = str.match(/^ *(\d{4})-(\d{1,2})-(\d{1,2}) +(\d{1,2}):(\d{1,2}):(\d{1,2}) *$/);
            if (results && results.length > 6)
                return new Date(parseInt(results[1], 10), parseInt(results[2], 10) - 1, parseInt(results[3], 10), parseInt(results[4], 10), parseInt(results[5], 10), parseInt(results[6], 10));
            results = str.match(/^ *(\d{4})-(\d{1,2})-(\d{1,2}) +(\d{1,2}):(\d{1,2}):(\d{1,2})\.(\d{1,9}) *$/);
            if (results && results.length > 7)
                return new Date(parseInt(results[1], 10), parseInt(results[2], 10) - 1, parseInt(results[3], 10), parseInt(results[4], 10), parseInt(results[5], 10), parseInt(results[6], 10), parseInt(results[7], 10));
        }
        else if (typeof str == 'number') {
            return new Date(str * 1000);
        }
        return null;
    };
console.log(parseDate("2017-12-12 12:00:00"))//Tue Dec 12 2017 12:00:00 GMT+0800 (中国标准时间)

拿到日期后日期简单封装http://blog.csdn.net/caohoucheng/article/details/79129747