Js 使用 Format()

<script type="text/javascript">
  function Format(str, json){
   return str.replace(/{(\d)}/g, function(a, key) {
    return json[key];
   });
  }
</script>
<script type="text/javascript">document.write(Format("{0}是{1}的{2}",["这句话","测试","结果"]));</script>