Solve the problem that Preview PDF cannot be downloaded

1. background

It's been developed recently A The data archived by the system should be transferred into B System , stay B System generated PDF file . After that A The system previews and downloads .

2. problem

1. File names cannot be backfilled

2. Save type no pdf

3. solve

 /**
     *  Implement the asset system through the interface mode 
     *                PDF preview 
     * @author chenf
     */
    @RequestMapping(value = "/sign-process/queryFile", method = RequestMethod.GET)
    public RestfulResult queryFile(String assetUrl,
    		HttpServletRequest request,HttpServletResponse response) throws UnsupportedEncodingException 
    {   	
    	String param = assetUrl;
    	param = URLDecoder.decode(URLDecoder.decode(param, "utf-8"),"utf-8");
    	param = StringEscapeUtil.encode(param);
    	OutputStream out = null;
    	RestfulResult result = new RestfulResult();
    	try 
    	{
    		out = response.getOutputStream();
    		//  Executive business 
    		this.signAssetservice.getAssetFile(request,response,param,out);
    		return null;
    	} catch (Exception e) 
    	{
    		log.setState(" error ");
    		log.setDescribe(e.toString());
    		logManage.addLog(log);
    		result.setCode(RestfulResult.ERROR_CODE);
			result.setMsg(log.getDescribe());
			return result;
    	}finally 
    	{
			try
			{
				if(out != null)
				{
					out.close();
				}
			} catch (IOException e)
			{
				e.printStackTrace();
			}
    	}
    }
	
	
	@Override
	public void getAssetFile(HttpServletRequest request,HttpServletResponse response,String param,OutputStream out) {
		FileInputStream in = null;
		String fileurl = null;
		fileurl = param;
		
		try {
			File file = new File(fileurl);
			String fileName = file.getName();
			// Chinese compatible Firefox browser 
			if (request.getHeader("User-Agent").toLowerCase().indexOf("firefox") > 0) {
				downShowName = "=?UTF-8?B?"+(new String(Base64.encode(fileName.getBytes("UTF-8")))) + "?=";
			} else {
				downShowName = java.net.URLEncoder.encode(fileName,"UTF-8");
			}
			response.setContentType("application/pdf");// Tell the browser that the output is pdf
			response.setHeader("Content-Disposition", "inline;filename="+downShowName);//inline Show |attachment download 
			in = new FileInputStream(file);
			byte[] date = new byte[in.available()];// Get file size 
			in.read(date);// Read the file as a byte stream 
			out.write(date);
		}catch (Exception e) {
			throw new RuntimeException(e.toString());
		}finally {
			if(in!=null){
				try
				{
					in.close();
				} catch (IOException e)
				{
					e.printStackTrace();
				}
			}
		}
	}