html 如何d出一个选择路径的对话框，只要路径，不要具体某个文件

楼主，你还在么？

四年了，你找了我四年了是吗？

我来了。你在哪？

<input type=button value=选择路径 onclick='javascript: new ActiveXObject("Shell.Application").BrowseForFolder(0, "请选择路径", 0, "")'>

BufferedWriter bw = null

OutputStreamWriter osw = null

String headStr = "attachmentfilename=\"" + fileName + "\""

response.setContentType("APPLICATION/OCTET-STREAM")

response.setHeader("Content-Disposition", headStr)

osw = new OutputStreamWriter(outs, "GB2312")

bw = new BufferedWriter(osw)