多个二维码的图片读取返回数组，在异常里处理
public static String decode(File file) throws Exception {BufferedImage image;image = ImageIO.read(file);if (image == null) {return null;}BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));Result result=null;Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();hints.put(DecodeHintType.CHARACTER_SET, CHARSET);//优化精度hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);//复杂模式，开启PURE_BARCODE模式hints.put(DecodeHintType.PURE_BARCODE, Boolean.TRUE);try{result = new MultiFormatReader().decode(bitmap, hints);}catch(Exception e){e.printStackTrace();QRCodeMultiReader qc = new QRCodeMultiReader();//一张图片有多张二维码取最后一个Result[] r = qc.decodeMultiple(bitmap, hints);if(r!=null && r.length>0){String resultStrTemp = r[r.length-1].getText();return resultStrTemp;}}String resultStr = result.getText();return resultStr;}