struts2中文件支持迅雷下载
如果采用struts2中的stream模式，在迅雷下载时显示的文件名就会类似于XXXdownload.action这种，无法显示其真正的文件，如下所示：
配置文件：
<result name="download" type="stream">
<param name="contentType">${downloadContentType}</param>
<param name="inputName">downloadStream</param>
<param name="contentDisposition">user;filename="${downloadFileName}"</param>
<param name="bufferSize">4096</param>
</result>
后台代码：
downloadContentType = "application/vnd.ms-excel;charset=UTF-8";
downloadFileName = java.net.URLEncoder.encode(title, "UTF-8") +".xls";
ByteArrayOutputStream output = new ByteArrayOutputStream();
wb.write(output);
downloadStream = new ByteArrayInputStream(output.toByteArray());
return "download";
如图：
为了实现迅雷下载时显示真正的文件名，将后台代码改成：
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("application/octet-stream");
response.setHeader("content-disposition", "attachment;filename=" + java.net.URLEncoder.encode(title, "UTF-8") + ".xls");
String downloadPath = request.getSession().getServletContext().getRealPath("/WEB-INF/downloads");
Date now = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
FileOutputStream output = new FileOutputStream(downloadPath + "/" + sdf.format(now) + ".xls");
wb.write(output);
output.flush();
output.close();
//核心代码就下面这一行
request.getRequestDispatcher("/WEB-INF/downloads/" + sdf.format(now) + ".xls").forward(request, response);
return null;
修改后效果如图：
前台链接记得加一个随机数，以免迅雷的秒传起作用
<%=basePath%>background/member_download.action?rnd=" + Math.random()
