条形码/二维码

来源：互联网发布：阿里云agent插件离线编辑：程序博客网时间：2024/04/29 11:50

1-1. ZXing是一个开源Java类库用于解析多种格式的条形码和二维码.

官网：http://code.google.com/p/zxing/

提供以下编码格式的支持：

UPC-A and UPC-E
EAN-8 and EAN-13
Code 39
Code 93
Code 128
QR Code
ITF
Codabar
RSS-14 (all variants)
Data Matrix
PDF 417 ('alpha' quality)
Aztec ('alpha' quality)

同时官网提供了 Android、cpp、C#、iPhone、j2me、j2se、jruby、objc、rim、symbian等多种应用的类库，具体详情可以参考下载的源码包中。

可以将文档中core、javase文件夹中的源码打包成jar供如下使用：

package org.hz.recode;import java.awt.image.BufferedImage;import java.io.File;import java.util.Hashtable;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.EncodeHintType;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;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;public class ZxingHandler {/**      * 编码      * @param contents      * @param width      * @param height      * @param imgPath      */      public void encode(String contents, int width, int height, String imgPath) {          Hashtable<Object, Object> hints = new Hashtable<Object, Object>();          // 指定纠错等级          hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);          // 指定编码格式          hints.put(EncodeHintType.CHARACTER_SET, "GBK");          try {              BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,                      BarcodeFormat.QR_CODE, width, height, hints);                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));                Hashtable<Object, Object> hints = new Hashtable<Object, Object>();              hints.put(DecodeHintType.CHARACTER_SET, "GBK");                result = new MultiFormatReader().decode(bitmap, hints);              return result.getText();          } catch (Exception e) {              e.printStackTrace();          }          return null;      }        /**      * @param args      */      public static void main(String[] args) {  String imgPath = "d:/michael_zxing.png";String contents = "Hi! welcome to Zxing!";  int width = 300, height = 300;ZxingHandler encodeHandler = new ZxingHandler();encodeHandler.encode(contents, width, height, imgPath);            ZxingHandler decodeDandler = new ZxingHandler();          String decodeContent = decodeDandler.decode(imgPath);          System.out.println("解码内容如下：");          System.out.println(decodeContent);      }  }