split
//   和数组的join方法相对应(join->按照指定的分隔符把数组拆分成字符串)
//   把一个字符串按照指定的分隔符,拆分成数组中的每一项
//    var ary = [12, 23, 34, 45];
//    var str = ary.join("+");
//    console.log(str);//->"12+23+34+45"

//    var newAry = str.split("+");
//    console.log(newAry);//->["12", "23", "34", "45"]

 var str = "2016-1-2 13:1:23";
    //->"2016年01月02日 13时01分23秒"

    var ary = str.split(" ");//->["2016-1-2", "13:1:23"]
    var leftAry = ary[0].split("-");//->"2016-1-2" ->["2016", "1", "2"]
    var rightAry = ary[1].split(":");//->"13:1:23" ->["13", "1", "23"]
    var time = leftAry[0] + "年" + addZero(leftAry[1]) + "月" + addZero(leftAry[2]) + "日 " + addZero(rightAry[0]) + "时" + addZero(rightAry[1]) + "分" + addZero(rightAry[2]) + "秒";
    console.log(time);

    function addZero(value) {
       if (value < 10) {
          value = "http://www.mamicode.com/0" + value;
       }
       return value;
       // return value < 10 ? "0" + value : value;
    }

格式化时间字符串