java文件下载导出

$("#btnExport").click(function(){
                top.$.jBox.confirm("确认要导出房屋信息吗？","系统提示",function(v,h,f){
                    if(v=="ok"){
                        $("#searchForm").attr("action","${ctx}/sys_house_apply/sysHouseApply/exportsd");
                        $("#searchForm").submit();
                    }
                    $("#searchForm").attr("action","${ctx}/sys_house_apply/sysHouseApply/houseList");
                },{buttonsFocus:1});
                top.$(‘.jbox-body .jbox-icon‘).css(‘top‘,‘55px‘);
  })


<input id="btnExport" style="font-size:13px;width: 40px;padding-left: 6px;height: 26px;padding-top: 2.5px;" class="btn btn-primary" type="button" value="导出"/>

controller中代码
@RequestMapping(value = "exportsd",method=RequestMethod.POST)
    public String exportproject(SysHouseApply sysHouseApply,HttpServletRequest request,　　//SysHouseApply:前台form表单中的对象
            HttpServletResponse response,RedirectAttributes redirectAttributes)throws Exception{
    
        List<SysHouseApply> waitList = new ArrayList<SysHouseApply>() ;//查询需要的数据try{
             SimpleDateFormat sim=new SimpleDateFormat("yyyy-MM-dd");//格式化时间
             String fileName = "demo"+DateUtils.getDate("yyyyMMddHHmmss");//导出的文件名
                //用来存放导出的数据
                List<SysHouseApplyException> exporthistor = new ArrayList<SysHouseApplyException>();
                for(int i=0;i<waitList.size();i++){
                    SysHouseApplyException obj1 = new SysHouseApplyException();
　　　　　　　　　　　　obj1.setHouseId(waitList.get(i).getHouseId());//将查询出的数据 set到要导出的文件对象中
　　　　　　　　　　　　exporthistor.add(obj1);
            }
            new ExportExcel("房屋信息", SysHouseApplyException.class).setDataList(exporthistor).write(response, fileName).dispose();//SysHouseApplyException导出文件对象
            return null;
        } catch (Exception e) {
            addMessage(redirectAttributes, "导出房屋信息失败！失败信息："+e.getMessage());
        }
        
        return "redirect:"+Global.getAdminPath()+"/sys_house_apply/sysHouseApply/houseList?repage";//页面查询连接
    }

SysHouseApplyException导出文件对象

/**
* 租房信息Entity
*/
public class SysHouseApplyException extends DataEntity<SysHouseApplyException> {

　　private static final long serialVersionUID = 1L;
　　private String houseId;//房屋Id


　　@ExcelField(title="房屋ID", align=2, sort=1)
　　public String getHouseId() {
　　return houseId;
　　}

　　public void setHouseId(String houseId) {
　　this.houseId = houseId;
　　}

}