图片显示+文件下载

图片显示 

//图片的显示public String loadDown() throws Exception {System.out.println("下载测试");HttpServletResponse response = ServletActionContext.getResponse();File url = new File(ServletActionContext.getRequest().getSession().getServletContext().getRealPath("/images/quality/QLoveLady.gif"));BufferedInputStream bis = null;OutputStream os = null;if (url != null) {bis = new BufferedInputStream(new FileInputStream(url));byte[] buffer = new byte[1024 * 8];int result = -1;os = response.getOutputStream();while ((result = bis.read(buffer)) != -1) {os.write(buffer, 0, result);}os.flush();bis.close();os.close();}return null;}//文件下载//下载    public String download1() {    HttpServletResponse response = ServletActionContext.getResponse();    // path是指欲下载的文件的路径。    String fn="json转换.doc";    File file = new File(ServletActionContext.getRequest().getSession().getServletContext().getRealPath("/acc_file/"+fn));        try {        if(file.isFile()){        // 取得文件名。        String filename = file.getName();        // 取得文件的后缀名。        String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();        System.out.println(ext);        // 以流的形式下载文件。        InputStream fis = new BufferedInputStream(new FileInputStream(file));        byte[] buffer = new byte[fis.available()];        fis.read(buffer);        fis.close();        // 清空response        response.reset();        // 设置response的Header        response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes()));        response.addHeader("Content-Length", "" + file.length());        OutputStream toClient = new BufferedOutputStream(response.getOutputStream());        response.setContentType("application/octet-stream");        toClient.write(buffer);        toClient.flush();        toClient.close();        }        } catch (IOException ex) {            ex.printStackTrace();        }        return null;    }