File uploading and downloading (c) download file

 download:

//下载文件
　　　　public void downloadFile(HttpServletResponse response, String url)throws IOException {
        response.reset();
        response.setContentType("application/x-msdownload; charset=GBK");
        String fileName = new String(url.getBytes("gb2312"), "ISO-8859-1");
        response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName);
         // 获取文件路径
        String filePath="d:\\upload\\"+url;
        File file=new File(filePath);
        FileInputStream in = new FileInputStream(file);
        BufferedInputStream bis=new BufferedInputStream(in);
        byte[] buffer = new byte[512];
        int i=bis.read(buffer);
        OutputStream outputStream=response.getOutputStream();
        while(i!=-1){
            outputStream.write(buffer,0,i);
            i=bis.read(buffer);
        }
        outputStream.flush();
        in.close();
        bis.close();
        outputStream.close();
        
    }

 

Show pictures

public static final String showImg(HttpServletResponse response, String path) throws IOException {
          FileInputStream fileIs=null;
          try {
              fileIs = new FileInputStream(path);
          } catch (Exception e) {
           return null;
          }
          int I = fileIs.available (); // get the file size    
          byte Data [] = new new  byte [I];   
          fileIs.read (Data);   // read data    
          the response.setContentType ( "Image / *"); // set the type of picture file return 
          the OutputStream the outStream response.getOutputStream = (); // get the object output binary data to the client    
          outStream.write (data);   // output data       
          outStream.flush ();  
          outStream.close();   
          fileIs.close();
          return path;
    }

 

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