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();
 }
 }

}