java二维码生成的方法

package cn.huse.erweima;import java.io.File;import java.util.HashMap;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/** * 生成二维码 * */public class CreateQRCode { public static void main(String[] args) { int width = 300; int height = 300;  String format = "gif"; String content = "www.baidu.com";  //定义二维码的参数 HashMap hints = new HashMap<>(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M); try {  BitMatrix matrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height,hints);  File file = new File("e:"+File.separator+"new.gif");  MatrixToImageWriter.writeToFile(matrix, format, file); } catch (Exception e) {  e.printStackTrace(); } }}

package cn.huse.erweima;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.util.HashMap;import javax.imageio.ImageIO;import com.google.zxing.BinaryBitmap;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatReader;import com.google.zxing.NotFoundException;import com.google.zxing.Result;import com.google.zxing.client.j2se.BufferedImageLuminanceSource;import com.google.zxing.common.HybridBinarizer;//解析二维码public class ReadQRCode { public static void main(String[] args) {  MultiFormatReader formatReader = new MultiFormatReader(); File file = new File("e:"+File.separator+"new.gif"); try {  BufferedImage image = ImageIO.read(file);  BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));  HashMap hints = new HashMap<>();  hints.put(EncodeHintType.CHARACTER_SET, "utf-8");    Result result = formatReader.decode(binaryBitmap,hints);  System.out.println(result.toString());  System.out.println(result.getBarcodeFormat());  System.out.println(result.getText()); } catch (NotFoundException e) {  e.printStackTrace(); } catch (IOException e) {  e.printStackTrace(); } }}