HttpURLConnection

 

 

 

1 用HttpURLConnection来读取网络上的文件 

	public static  void genFile(HttpServletRequest request, String name,
			) throws Exception {
			 
			String rootPath = request.getRealPath("/");
			 
			String saveDir = rootPath+ "htmlDir"+File.separator  +videoID;
			File saveDirFile = new File(saveDir);
			 
			if( !saveDirFile.exists()){
				saveDirFile.mkdirs();
			}
			 
			StringBuffer pagUrl = new StringBuffer("http://localhost:").append(
			request.getLocalPort()).append("/user?");
			pagUrl.append("name="+name );
			 
			 
			URL url = new URL(pagUrl.toString());
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setConnectTimeout(5000);
			conn.setReadTimeout(5000);
			conn.connect();
			InputStream os = conn.getInputStream();
			FileOutputStream fos = new FileOutputStream( new File(saveDir , "userlist.shtml"));
			byte[] b = new byte[10240];
			int n = -1;
			while ((n = os.read(b)) != -1) {
				fos.write(b, 0, n);
			}
			fos.close();
			os.close();
			conn.disconnect();
			url = null;
	}