zxing解析二维码抛出com.google.zxing.NotFoundException的解决过程

// 解码设置编码方式为：utf-8，
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);

/**
 * 流图片解码
 * @param 	input
 * @return 	QRResult
 */
public static QRResult decode(InputStream input) {
	
	BufferedImage image;
	try {
		if (null == input) {
			return new QRResult("得到的文件不存在！",300);
		}
		image = ImageIO.read(input);
		LuminanceSource source = new BufferedImageLuminanceSource(image);
		BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
		
		Map<DecodeHintType,Object> hints = new LinkedHashMap<DecodeHintType,Object>();
		// 解码设置编码方式为：utf-8，
		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);
		Result result = new MultiFormatReader().decode(bitmap, hints);
		String txt = result.getText();
		return new QRResult("成功解码！",200,txt);
	} catch (Exception e) {
		LoggerUtils.error(MatrixUtil.class,"解码失败。", e);
		return new QRResult("解码失败，请确认的你二维码是否正确，或者图片有多个二维码！",500);
	}
}
/**
 * 返回值处理
 * @author zhou-baicheng
 *
 */
public static class QRResult{
	public QRResult(String message,int status) {
		this.message = message;
		this.status = status;
		this.txt = "";
	}
	public QRResult(String message,int status,String txt) {
		this.message = message;
		this.status = status;
		this.txt = txt;
	}
	//解码内容
	private String txt;
	//返回的消息内容
	private String message;
	//返回的状态码，200：成功，500：错误
	private int status ;
	public String getMessage() {
		return message;
	}
	public void setMessage(String message) {
		this.message = message;
	}
	public int getStatus() {
		return status;
	}
	public void setStatus(int status) {
		this.status = status;
	}
	public String getTxt() {
		return txt;
	}
	public void setTxt(String txt) {
		this.txt = txt;
	}
}