poi(页面文件导出到excel)实现文件下载

在写好的excel结构之后，添加如下代码

//通过Response把数据以Excel格式保存  
        response.reset();  
        response.setContentType("application/msexcel;charset=UTF-8");  
        response.setCharacterEncoding("UTF-8");  
        try {  
            response.addHeader("Content-Disposition", "attachment;filename=\""  
                    + new String(("test" + ".xls").getBytes("UTF-8"),  
                            "ISO8859-1") + "\"");  
            OutputStream out = response.getOutputStream();  
            hssfWorkbook.write(out);  
            out.flush();  
            out.close();
            hssfWorkbook.close();
        } catch (Exception e) {  
            e.printStackTrace();  
        }