下载小例子

public class DownServlet extends HttpServlet {
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		String name = req.getParameter("name");
		String n=new String(name.getBytes("iso8859-1"),"utf-8");
		ServletContext context = this.getServletContext();
		String mimeType = context.getMimeType(n);
		resp.setContentType(mimeType);
		resp.setHeader("content-disposition", "attachment;filename="+new String(n.getBytes("gbk"),"iso8859-1"));
		InputStream in = context.getResourceAsStream("/"+n);
		ServletOutputStream os = resp.getOutputStream();
		IOUtils.copy(in, os);
		in.close();
		os.close();
	}
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		doGet(req, resp);
	}
}