下拉框自动获取数据库字段值代码

java代码：
public void ajax() throws IOException, InvocationTargetException, NoSuchMethodException, IllegalAccessException
{
Map map = new HashMap();
List list = getUserService().queryForList(map);
responseText(EasyuiUtil.toComboboxData(list, "user_id,user_name"));
}

JAVASCRIPT代码
$('#diray_project_id').combobox({
url:'${ctx}project_ajax_list.do',
valueField:'project_id',
textField:'project_name',
editable:false,
value:'',
panelHeight:60
});

$('#finddiray_project_id').combobox({
url:'${ctx}project_ajax_list.do',
valueField:'project_id',
textField:'project_name',
editable:false,
value:'',
panelHeight:60,
onChange:function(){
easyui_form_query('dg_diray');
}
});

添加/编辑页面
<tr>
<th>项目名称:</th>
<td>
<input type="text" id="diray_project_id" name="diray.project_id" value="${diray.project_id}" />

</td>
</tr>