java文件下载和在线打开

/** * @author chenzheng * @since 2013-9-10 * @Description: java下载 * @throws * @param filePath * @param response * @param isOnLine * @throws Exception * void */public void downLoad() throws Exception {String paths=ServletActionContext.getServletContext().getRealPath("/");System.out.println(paths);String filePath="F:\\哈哈.txt";boolean isOnLine=false;HttpServletResponse response = ServletActionContext.getResponse();response.setCharacterEncoding("utf-8");        File f = new File(filePath);        if (!f.exists()) {            response.sendError(404, "File not found!");            return;        }        BufferedInputStream br = new BufferedInputStream(new FileInputStream(f));        byte[] buf = new byte[1024];        int len = 0;        response.reset(); // 非常重要        String filename=new String(f.getName().getBytes("gbk"),"iso-8859-1");        if (isOnLine) { // 在线打开方式            URL u = new URL("file:///" + filePath);            response.setContentType(u.openConnection().getContentType());            response.setHeader("Content-Disposition", "inline; filename=" + f.getName());            // 文件名应该编码成UTF-8        } else { // 纯下载方式            response.setContentType("application/x-msdownload");            response.setHeader("Content-Disposition", "attachment; filename=" +filename );        }        OutputStream out = response.getOutputStream();        while ((len = br.read(buf)) > 0)            out.write(buf, 0, len);        br.close();        out.close();    }

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