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	public static void testFile(String url,String savepath) {
		
		FileOutputStream fos = null;
		int SIZE = 8096; // 缓冲区大小
		byte[] buf = new byte[SIZE];
		int size = 0;
		String fileName = savepath;
		try {
		
			int b=url.lastIndexOf("/");
			fileName=""+fileName+""+System.currentTimeMillis()+url.substring(b+1, url.length());
			URL url2 = new URL(url);
			HttpURLConnection httpUrl = (HttpURLConnection) url2
					.openConnection();
			// 连接指定的网络资源
			httpUrl.connect();
			// 获取网络输入流
			BufferedInputStream bis = new BufferedInputStream(httpUrl
					.getInputStream());

			// 建立文件
			fos = new FileOutputStream(fileName);
			while ((size = bis.read(buf)) != -1)
				fos.write(buf, 0, size);

			fos.close();
			bis.close();
			httpUrl.disconnect();
			System.out.println("Test.testFile() sucess" + fileName);
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("Test.testFile() fail" );
		}

	}