Fallstudie einer Java-Generierungs-QR-Code-Toolklasse (Bild)

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<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"); 
  } 
 } 
  
 /** 
  * 
  * 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<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(); 
  } 
 } 
  
  
 /** 
  * 
  * 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<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"); 
 } 
}