正则表达式去掉字符串中的“-”以及删除最后三个字符

[xiaobo000000]

如代码所示，td标签里的字符串为2016-08-09 07:04:56，我想用正则表达式将其改为20160809 07:04的格式，请大神帮忙。<td class = 'time_info'>2016-08-09 07:04:56</td>

<script>
(使用正则表达式和JavaScript)
$('.time_info').html()
</script>

[老鼠拧刀满街找猫]

一楼的方法可行，和我的思路一致

[似梦飞花]

var reg=/-|(?::\d+$)/g;
var str='2016-08-09 07:04:56';
str=str.replace(reg,'');
alert(str);

[cn00439805]

方法1(不管不顾替换法)：

  var ele = document.querySelector(".time_info");
  ele.innerHTML =  ele.innerHTML.replace(/-/g,"");

方法2(整体提取拼装法)：

  var str = "2016-8-9 7:04:56.540";
  var reg = /^(\d{4})-(\d{1,2})-(\d{1,2})(\s|T)(\d{1,2})(:(\d{1,2}))?(:(\d{1,2}))?(\.(\d{1,3}))?$/g;
  arr = reg.exec(str);
  var result = "我在今年" + arr[1] + "年" + arr[2] + "月" + arr[3] + "日" + arr[5] + ":" + arr[7] + ":" + arr[9]  + "又" + arr[11] + "毫秒，发了一个帖子";
  document.querySelector(".time_info").innerHTML = result ;