爬取网页，对资源文件进行存储时，抛出java.io.IOException: Server returned HTTP response code: 403 for URL 异常

处理方法：

URLConnection openConnection = new URL(href).openConnection();

			openConnection.addRequestProperty("User-Agent", Config.DEFAULT_USER_AGENT);

			openConnection.connect();

			//InputStream in = url.openStream();

			InputStream in = openConnection.getInputStream();

			OutputStream out = new BufferedOutputStream(new FileOutputStream(savePath));

			for (int len; (len = in.read()) != -1;) {

				out.write(len);

			}

			out.close();

			in.close();

主要是第二行代码，设置User-Agent，如果不设置，有些网站服务器设置禁止爬取，就会抛出code:403异常