想要访问一个地址，然后把下载的东西放到一个文件夹里，求思路，有需要用的类最好！

Question

 
java IO流上传，下载文件。好好看看。

Answer 1

HttpURLConnection urlConn = null;
                
                        url = new URL(strUrl);
                        urlConn = (HttpURLConnection) url.openConnection();
                        urlConn.setConnectTimeout(1000 * 20);
                       InputStreamReader in = new InputStreamReader(urlConn.getInputStream());
获取到inputstream，你就写到你的文件夹下去
                        

Answer 2

String filePath=request.getRealPath("/..");
   String filename = "total.zip";
       File fileLoad = new File(filePath, filename);         FileInputStream in = null; // 输入流  
       OutputStream out = response.getOutputStream();  
       byte b[] = new byte[1024];  
  
        try {  
 
             response.setContentType("application/x-msdownload;");  
  
            response.setHeader("Content-disposition", "attachment; filename="  
                   + new String(filename.getBytes("UTF-8"), "UTF-8"));  
  
            // download the file.  
            in = new FileInputStream(fileLoad);  
           int n = 0;  
            while ((n = in.read(b)) != -1) {  
                out.write(b, 0, n);  
           }         } catch (Throwable e) {  
            e.printStackTrace();  
      } finally {  
           try {  
               in.close();  
            out.close();  
                    } catch (Throwable e) {  
                e.printStackTrace();  
           }  
       }