************下载问题*********

Question

response.setHeader("ContentDisposition","attachment;filename=*。*");  
response.setHeader(  "Content-Type  ",    "application/octet-stream  ");

Answer 1

http://expert.csdn.net/Expert/topic/981/981112.xml?temp=.3152887
http://expert.csdn.net/Expert/topic/1194/1194026.xml?temp=.2346002

Answer 2

response.sendRedirect("文件路径");

Answer 3

jsp:
<a href="servlet1?url=download/&filename="+filename><%=filename%>下载</a>servlet:
        String fileName=request.getParameter("filename");
        String url=request.getParameter("url");
        response.setContentLength(1000);
        fileName = "attachment; filename="+url+fileName;
        response.setHeader("Content-Disposition", fileName);