Combobox组件官方文档：   http://www.jeasyui.com/documentation/index.php#

配置示例

<input class="easyui-combobox" id="themes" name="themes" data-options="url:'<%=basePath %>resources/json/KeyType.json',
       	  		 method:'get', valueField:'value',  textField:'text', multiple:true,  panelHeight:'auto' ">

[{
	"value":"sidaluanjian",
	"text":"私搭乱建"
},{
	"value":"cnuisance",
	"text":"施工扰民"
},{
	"value":"roaddamage",
	"text":"道路破损"
},{
	"value":"sdtrash",
	"text":"暴漏垃圾"
}]

combobox获取单个值
$(‘#mycomBox‘).combobox(‘getValue‘);

combobox获取多个值
$(‘#mycomBox‘).combobox(‘getValues‘);

如果是获得文本内容，将getValue改为getText即可

jQuery easyui combobox获取值（多个）