利用java生成二维码工具类示例代码

二维码介绍

二维条形码最早发明于日本，它是用某种特定的几何图形按一定规律在平面（二维方向上）分布的黑白相间的图形记录数据符号信息的，在代码编制上巧妙地利用构成计算机内部逻辑基础的“0”、“1”比特流的概念，使用若干个与二进制相对应的几何形体来表示文字数值信息，通过图象输入设备或光电扫描设备自动识读以实现信息自动处理。

如下为java生成二维码工具类，可以选择生成文件，或者直接在页面生成，话不多说了，来一起看看详细的示例代码吧。

示例代码

import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.NIO.file.FileSystems; import java.util.HashMap; import java.util.Map;  import javax.imageio.ImageIO; import javax.servlet.Http.httpservletResponse;  import org.slf4j.Logger; import org.slf4j.LoggerFactory;  import com.alibaba.fastJSON.jsONObject; import com.Google.zxing.BarcodeFORMat; import com.google.zxing.Binarizer; 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.NotFoundException; import com.google.zxing.Result; import com.google.zxing.WriterException; 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;   public class QRCodeUtil {    private static final Logger log = LoggerFactory.getLogger(QRCodeUtil.class);        public static void generatEncodeTest(String filePath, String fileName, String number, String phone)  {      int width = 200; // 图像宽度   int height = 200; // 图像高度   String format = "png";// 图像类型      JSONObject json = new JSONObject();   json.put("number",number);   json.put("phone", phone);   String content = json.toJSONString();// 内容      Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();   hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");      try   {    BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵    String path = FileSystems.getDefault().getPath(filePath, fileName).toString();    File file = new File(path);    MatrixToImageWriter.writeToFile(bitMatrix, format, file);// 输出图像    System.out.println("二维码输出成功");    System.out.println("图片地址：" + filePath + fileName);    System.out.println("---------------------------");   }   catch (WriterException e)   {    e.printStackTrace();    System.out.println("二维码输出异常");   }   catch (IOException e)   {    e.printStackTrace();    System.out.println("二维码输出异常");   }  }      public static void parseDecodeTest(String filePath)  {   BufferedImage image;   try   {    image = ImageIO.read(new File(filePath));    LuminanceSource source = new BufferedImageLuminanceSource(image);    Binarizer binarizer = new HybridBinarizer(source);    BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);        Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();    hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");        Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码    JSONObject content = JSONObject.parseObject(result.getText());        StringBuffer sb = new StringBuffer();    sb.append("编号：")     .append(content.getString("number"))     .append("\r\n")     .append("手机号码:")     .append(content.getString("phone"));    String returnText = sb.toString();    System.out.println(returnText);   }   catch (IOException e)   {    e.printStackTrace();   }   catch (NotFoundException e)   {    e.printStackTrace();   }  }        public static void generatEncode(HttpServletResponse response, String number, String phone)  {   JSONObject json = new JSONObject();   json.put("number",number);   json.put("phone", phone);   String content = json.toJSONString();// 内容      int width = 200; // 图像宽度   int height = 200; // 图像高度   String format = "png";// 图像类型      Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();   hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");      try   {        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵    MatrixToImageWriter.writeToStream(bitMatrix, format, response.getOutputStream());// 输出图像    log.info("二维码输出成功");   }   catch (WriterException e)   {    e.printStackTrace();    log.error("二维码输出异常");   }   catch (IOException e)   {    e.printStackTrace();    log.error("二维码输出异常");   }  }    public static void main(String[] args)  {   generatEncodeTest("D:\\","zxing.png","001","13019931996");   parseDecodeTest("D:\\zxing.png");  } }