zxing条形码的生成和解码
转载:http://sjsky.iteye.com/blog/1142177

package michael.zxing;    import java.awt.image.BufferedImage;import java.io.File;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;import com.google.zxing.BinaryBitmap;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.MultiFormatWriter;import com.google.zxing.Result;import com.google.zxing.client.j2se.BufferedImageLuminanceSource;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;  /**  * @blog http://sjsky.iteye.com  * @author Michael  */  public class ZxingEAN13EncoderHandler {        /**      * 编码      * @param contents      * @param width      * @param height      * @param imgPath      */      public void encode(String contents, int width, int height, String imgPath) {          int codeWidth = 3 + // start guard                  (7 * 6) + // left bars                  5 + // middle guard                  (7 * 6) + // right bars                  3; // end guard          codeWidth = Math.max(codeWidth, width);          try {              BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,                      BarcodeFormat.EAN_13, codeWidth, height, null);                MatrixToImageWriter                      .writeToFile(bitMatrix, "png", new File(imgPath));            } catch (Exception e) {              e.printStackTrace();          }      }          /**      * @param imgPath      * @return String      */      public String decode(String imgPath) {          BufferedImage image = null;          Result result = null;          try {              image = ImageIO.read(new File(imgPath));              if (image == null) {                  System.out.println("the decode image may be not exit.");              }              LuminanceSource source = new BufferedImageLuminanceSource(image);              BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));                result = new MultiFormatReader().decode(bitmap, null);              return result.getText();          } catch (Exception e) {              e.printStackTrace();          }          return null;      }      /**      * @param args      */      public static void main(String[] args) {          String imgPath = "zxing_EAN13.png";          // 益达无糖口香糖的条形码          String contents = "6923450657713";            int width = 105, height = 50;          ZxingEAN13EncoderHandler handler = new ZxingEAN13EncoderHandler();          handler.encode(contents, width, height, imgPath);          String decode = handler.decode(imgPath);        System.out.println(decode);        System.out.println("Michael ,you have finished zxing EAN13 encode.");      }  }