jsp页面实现文件下载或者打开

java小脚步嵌入到jsp页面实现文件下载或者打开！

<% 
	request.setCharacterEncoding("GBK");
	response.setContentType("text/html;charset=GBK");
	String myName = "bing.gif";
	// 设置响应头和下载保存的文件名
	response.reset();
	response.setContentType("application/x-msdownload");       //windows
	response.setHeader("Content-Disposition", "attachment; filename=\"" + new String(myName.getBytes("gb2312"),"iso8859-1") + "\"");      
	
	//新建文件输入输出流
	OutputStream output = null;
	FileInputStream fis = null;
	try{
	  //新建File对象
	  File f = new File("D:/bea/user_projects/domains/gszj_domain/applications/localproject/images/bing.gif");
	  //新建文件输入输出流对象
	  output = response.getOutputStream();
	  fis = new FileInputStream(f);
	  //设置每次写入缓存大小
	  byte[] b = new byte[(int)f.length()];
	  //out.print(f.length());
	  //把输出流写入客户端
	  int i = 0;
	  while((i = fis.read(b)) > 0){
	    output.write(b, 0, i);
	  }
	  output.flush();
	}
	catch(Exception e){
	  e.printStackTrace();
	}
	finally{
	  if(fis != null){
	    fis.close();
	    fis = null;
	  }
	  if(output != null){
	    output.close();
	    output = null;
	  }
	}

%>