用barcode组件barbecue时产生的黑色横线的问题

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用barbecure 生成带标签的barcode时候，标签下面会带个黑色横线。

在sourceforge的barbecue的讨论区有人贴了个方法，能解决该问题。

http://sourceforge.net/p/barbecue/discussion/266281/thread/bb3d5344#

bowa
2008-01-28

i had the same problem on my development machine (windows) on the server i didnt see that line --- but there i run headles and i get the problem that the Humanreadable label is not showing up.

anyway

i got rid of that black bar by first writing the bacode out to a bytearray output stream ... oddly enough (it was by coincidence that i found this)

        //this is useless ... but it helps get rid of the black line.
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        BarcodeImageHandler.writePNG(bc, baos);

        File bcImg = File.createTempFile("bc-", ".png");
        bcImg.deleteOnExit();
        FileOutputStream fos = new FileOutputStream(bcImg);
        BarcodeImageHandler.writePNG(bc, fos);

wonder if that works for you too

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测试效果图：