项目中要实现多选，选择了 bootstrap-select 插件。
实例代码
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap-select 多选下拉框实现</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<link href="https://cdn.bootcss.com/bootstrap-select/1.12.1/css/bootstrap-select.min.css" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
<script src="https://cdn.bootcss.com/bootstrap-select/1.12.1/js/bootstrap-select.min.js"></script>
</head>
<body>
<div class="form-group">
<label class="col-lg-1 control-label">水果类型：</label>
<div class="col-lg-6">
<select id="fruits" class="selectpicker show-menu-arrow form-control" multiple>
<option value="0">苹果</option>
<option value="1">菠萝</option>
<option value="2">香蕉</option>
<option value="3">火龙果</option>
<option value="4">梨子</option>
<option value="5">草莓</option>
<option value="6">哈密瓜</option>
</select>
</div>
<button class="col-lg-1" onclick="getVal()">获取值</button>
</div>
<script>
// 获取值
function getVal() {
console.log($('#fruits').val());
}
// 回显操作
// var str = '3,4,5,6';
// var arr = str.split(',');
// $('#fruits').selectpicker('val', arr);
</script>
</body>
</html>
重点：
- 获取值
$('#fruits').val();
- 回显操作
$('#fruits').selectpicker('val', 数组);
页面效果
