JAVA流在页面上显示图片

在系统需要上传图片,但是不要把图片放到web路径下,这个时候就在硬盘上的另外地方

设置一个图片文件夹,

然后再读取硬盘上的图片,然后显示到JSP页面上

代码如下:

 String path=request.getParameter("path");

   File picFile = new File(path);
   if(!picFile.exists()){
    String uploadDir=WebUtils.getRealPath(request.getSession().getServletContext(), "/");
    path=uploadDir+"//crmres//images//error.gif" ;
    picFile = new File(path);
   }
   response.setContentType("image/jpeg; charset=GBK");
   //response.setHeader("Content-Disposition", "attachment; filename="+new String("temp.jpg".getBytes("GBK"),"ISO8859_1"));
   ServletOutputStream outputStream = response.getOutputStream();
   FileInputStream inputStream = new FileInputStream(picFile);
   byte[] buffer = new byte[1024];
   int i = -1;
   while ((i = inputStream.read(buffer)) != -1) {
      outputStream.write(buffer, 0, i);
   }
   outputStream.flush();
   outputStream.close();
   inputStream.close();
   outputStream = null;
   return null;