java讀流方式，下載網絡上的圖片

本工具類支持url的list集合，具體實現如下所示：

public static void download(ArrayList<String> listUrl,
			String downloadPath) {
		for (String url : listUrl) {
			try {
				getImageFromNetByUrl(url,downloadPath);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}
	
	
	public static void getImageFromNetByUrl(String strUrl,String path) throws Exception {
		String imageName = strUrl.substring(strUrl.lastIndexOf("/") + 1,
				strUrl.length());
		_FakeX509TrustManager.allowAllSSL();
		URL url = new URL(strUrl);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		// conn.setRequestMethod("GET");
		conn.setRequestProperty("User-Agent",
				"Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
		conn.setConnectTimeout(5 * 1000);
		InputStream inStream = conn.getInputStream();// 通過輸入流獲取圖片數據
		byte[] btImg = readInputStream(inStream);// 得到圖片的二進制數據
		inStream.close();
		conn.disconnect();
		try {
			File file = new File(path+imageName);
			DirectoryUtil.createFile(path+imageName);
			FileOutputStream fops = new FileOutputStream(file);
			fops.write(btImg);
			fops.flush();
			fops.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	public static byte[] readInputStream(InputStream inStream) throws Exception {
		ByteArrayOutputStream outStream = new ByteArrayOutputStream();
		byte[] buffer = new byte[1024];
		int len = 0;
		while ((len = inStream.read(buffer)) != -1) {
			outStream.write(buffer, 0, len);
		}
		inStream.close();
		return outStream.toByteArray();
	}

本方法支持自定義路徑：

調用事例：

//urlList 圖片的網絡地址的集合
ArrayList<String> urlList = new ArrayList<String>();
pictureFileUtil.download(urlList,"c:/demo/..下載的路徑");

 親測好使。。。