html页面显示乱码原因

最近用bootstrap树形插件

 

html

<div class="col-md-3">
       <div id="treeview4" class=""></div>
</div>

引用的js

<script src="../../dist/js/bootstrap-treeview.js"></script>
<script src="../../dist/js/treeview.js"></script> //为数据

<script type="text/javascript">
    $(function() {
        $('#treeview4').treeview({
          color: "#428bca",
          data: defaultData
        });
    });
   </script>

最后显示为乱码，查找原因后treeview.js 格式改为UTF-8