读取Linux上图片

/**

     * 读取图片

     * @param path

     * @param response

     * @throws Exception

     */

    public static void showImg(String path,HttpServletResponse response) throws Exception{

        File file = new File(path);

        if (file.exists()) {

            FileInputStream fileIs= new FileInputStream(path);

            int i=fileIs.available(); //得到文件大小

            byte data[]=new byte[i];

            fileIs.read(data); //读数据

            //JSP禁止图片缓存

            response.setHeader( "Pragma", "no-cache" );

            response.addHeader( "Cache-Control", "must-revalidate" );

            response.addHeader( "Cache-Control", "no-cache" );

            response.addHeader( "Cache-Control", "no-store" );

            response.setDateHeader("Expires", 0);

            response.setHeader("Content-type", "image/png");

            OutputStream outStream=response.getOutputStream(); //得到向客户端输出二进制数据的对象

            outStream.write(data); //输出数据

            outStream.flush();

            outStream.close();

            fileIs.close();

        }

    }