使用jar ：barcode4j.jar

代码如下：

package com.test;


import java.io.File;


import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;


import org.krysalis.barcode4j.impl.code128.Code128Bean;
import org.krysalis.barcode4j.output.svg.SVGCanvasProvider;
import org.krysalis.barcode4j.tools.UnitConv;
import org.w3c.dom.DocumentFragment;


public class BarcodeTest {
 public static void main(String[] args) throws Exception {
     Double moduleWidth = Double.valueOf(1.0D);
     double dpi = 150;
     Double width = 11d;
     Code128Bean bean = new Code128Bean();
     String barcode = "test123zxc";
     Integer barcodeLength = Integer.valueOf(barcode.length());
     if (barcodeLength.intValue() < 8)
     {
       moduleWidth = Double.valueOf(2.0D * width.doubleValue());
     }
     else if (barcodeLength.intValue() < 16)
     {
       moduleWidth = width;
     }
     if (moduleWidth.doubleValue() < 1.0D)
     {
       moduleWidth = Double.valueOf(1.0D);
     }
     bean.setModuleWidth(UnitConv.in2mm(moduleWidth.doubleValue() / dpi));
     SVGCanvasProvider canvas = new SVGCanvasProvider(false, 0);
     bean.generateBarcode(canvas, barcode);
     DocumentFragment frag = canvas.getDOMFragment();
     TransformerFactory factory = TransformerFactory.newInstance();
     Transformer trans = factory.newTransformer();
     Source src = new DOMSource(frag);
     Result res = new StreamResult(new File("D://barcode" + File.separator + 1 + ".svg"));
     trans.transform(src, res);
}
}