// 圖片轉化成base64字串
  	public static String GetImageStr(String imgFile) throws Exception {// 將圖片檔案轉化為位元組陣列字串，並對其進行Base64編碼處理
  		InputStream in = null;
  		byte[] data = null;
  		// 讀取圖片位元組陣列
  		ByteArrayOutputStream outputstream = null;
  		int index = imgFile.lastIndexOf(".");
  		String args1 = "jpg";
  		if (index > -1 && index < (imgFile.length() - 1)) {
  			args1 = imgFile.substring(index + 1);
  		} else {
  			throw new Exception("檔案字尾有誤url=" + imgFile);
  		}
  		URL url = new URL(imgFile);
  		BufferedImage bufferedImage=null;
  		try {
  			bufferedImage = ImageIO.read(url);
  		} catch (Exception e) {
  			throw new Exception("讀取圖片url["+imgFile+"]有誤！");
  		}
  		// 開始對圖片進行壓縮
  		outputstream = new ByteArrayOutputStream();
  		ImageIO.write(bufferedImage, args1, outputstream);
  		double k = outputstream.size();
  		int count = 0;
  		double com = 100 * 1024 * 0.9;// 比對基礎大小
  		BASE64Encoder encoder = new BASE64Encoder();
  		return encoder.encode(outputstream.toByteArray());
  	}