如何生成一维码

/**
*
* 一维码图片生成器
* @author winter.liu
*
*/
public class OneBarcodeUtil {

/**
* 生成一维码
* @param value 值
* @return
*/
public static byte[] createBarcodeDefault(String value){
return createBarcode(Code39Encoder.class,value,false);
}

//产生一维码图片
public static byte[] createBarcode(Class<?> clazz,String value,boolean checkDigit){
try{
JBarcode localJBarcode = new JBarcode(getInstance(clazz),WidthCodedPainter.getInstance(),EAN13TextPainter.getInstance());
localJBarcode.setPainter(WideRatioCodedPainter.getInstance());
localJBarcode.setTextPainter(BaseLineTextPainter.getInstance());
localJBarcode.setCheckDigit(checkDigit);
localJBarcode.setShowCheckDigit(checkDigit);
return getBytes(localJBarcode.createBarcode(value));
}catch (Exception e) {
e.printStackTrace();
return null;
}
}

//获取单例的对象
private static BarcodeEncoder getInstance(Class<?> clazz) throws Exception{
Constructor<?>[] constructors=clazz.getDeclaredConstructors();
Constructor<?> privateConstructor = constructors[0];
privateConstructor.setAccessible(true);
return (BarcodeEncoder)privateConstructor.newInstance();

}

//获取图片字节码数组
private static byte[] getBytes(BufferedImage paramBufferedImage) throws IOException{
return ImageUtil.encode(paramBufferedImage,"jpeg", 96, 96);
}

}