//支持前端搜索 data-live-search="true"，data-live-search-placeholder="搜索"
<select class="selectpicker" data-live-search="true">....</select>

//添加 multiple 支持多选，并且设置最多选 2 项 data-max-options="2"
<select class="selectpicker form-control" multiple data-max-options="2">...</select>

//data-actions-box="true" 全选/反选
<select class="selectpicker" multiple data-live-search="true" data-live-search-placeholder="搜索" data-actions-box="true">...<select>

//js初始化,设置选定的值
$('.selectpicker').selectpicker('val','1');
$('.selectpicker').selectpicker('val',['1','2']);

//更新UI
$('.selectpicker').selectpicker('refresh');

//选中事件
$('.selectpicker').on('changed.bs.select',function(e){
});