让浏览器下载文件，而不是直接打开

<a href="download.jsp?filePath=<s:property value="downloadAddr"/>&fileName=<s:property value="fileName"/>">下载</a>

download.jsp的内容（全部内容）：

<%	response.setContentType("application/octet-stream");
	String path = request.getParameter("filePath");
	String fileName = request.getParameter("fileName");
	response.addHeader("Content-Disposition","attachment; filename="+fileName);
	java.io.FileInputStream  fileInputStream = new java.io.FileInputStream(path);
	int i;
	while((i=fileInputStream.read())!=-1){
		out.write(i);
	}
	fileInputStream.close();
	out.close();
%>