利用java生成二维码工具类示例代码

 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; /** * * 二维码工具类 * @see [相关类/方法] * @since [产品/模块版本] */ public class QRCodeUtil { private static final Logger log = LoggerFactory.getLogger(QRCodeUtil.class); /** * * 生成二维码文件测试 * @param filePath 文件路径 * @param fileName 文件名 * @param number 编号 * @param phone 手机号 * @see [类、类#方法、类#成员] */ 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 hints = new HashMap(); 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"); } } /** * * 解析二维码内容测试 * @param filePath 二维码绝对路径 * @see [类、类#方法、类#成员] */ 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 hints = new HashMap(); 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(); } } /** * * 生成二维码输出流 *  在jsp页面中直接展示时使用 *  无须保存 即生成即展示 * @param response * @param number 编号 * @param phone 手机号 * @see [类、类#方法、类#成员] */ 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 hints = new HashMap(); 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-600","001","13019931996"); parseDecodeTest("D:\\zxing.png-600"); } }