springMVC实现Excel文件下载功能

web的下载很简单就是吧流返回给浏览器就行了。

其中Controller如下：

<span style="white-space:pre"> </span>/**
* 导出查询的数据
*/
@RequestMapping(value = "/wy_topSongListExcel.do")
public Object downLoadTopSongDataExcel(HttpServletRequest request,HttpServletResponse response)throws Exception {
String top_id = request.getParameter("top_id");
String column_id = request.getParameter("column_id");
HSSFWorkbook wookBook = createTopSongListExcel(top_id,column_id);//根据查询条件创建excel
OutputStream os = response.getOutputStream();
try {
response.reset();
String filename = "视频信息列表.xls";//设置下载时客户端Excel的名称
filename = WebUtil.encodeFilename(filename, request);//处理中文文件名
response.setHeader("Content-disposition", "attachment;filename=" + filename);
//response.setContentType("application/octet-stream; charset=utf-8");
response.setContentType("application/vnd.ms-excel;charset=utf-8");
wookBook.write(os);
os.flush();
} finally {
if (os != null) { os.close(); }
}
return null;
}

其中处理中文文件名的方法如下：
<span style="white-space:pre"> </span>/**
* 设置下载文件中文件的名称
*/
public static String encodeFilename(String filename,
HttpServletRequest request) {
/**
* 获取客户端浏览器和操作系统信息 在IE浏览器中得到的是：User-Agent=Mozilla/4.0 (compatible; MSIE
* 6.0; Windows NT 5.1; SV1; Maxthon; Alexa Toolbar)
* 在Firefox中得到的是：User-Agent=Mozilla/5.0 (Windows; U; Windows NT 5.1;
* zh-CN; rv:1.7.10) Gecko/20050717 Firefox/1.0.6
*/
String agent = request.getHeader("USER-AGENT");
try {
if ((agent != null) && (-1 != agent.indexOf("MSIE"))) {
String newFileName = URLEncoder.encode(filename, "UTF-8");
newFileName = StringUtils.replace(newFileName, "+", "%20");
if (newFileName.length() > 150) {
newFileName = new String(filename.getBytes("GB2312"),
"ISO8859-1");
newFileName = StringUtils.replace(newFileName, " ", "%20");
}
return newFileName;
}
if ((agent != null) && (-1 != agent.indexOf("Mozilla")))
return MimeUtility.encodeText(filename, "UTF-8", "B");

return filename;
} catch (Exception ex) {
return filename;
}
}