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本文實例為大家分享了java 二維碼的實現代碼，供大家參考，具體內容如下

這次用到的jar包是zxing，沒有用到core的jar包
先導入zxing.jar包

生成二維碼

									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;

									/**

									 * 生成二維碼

									 *

									 */

									public class CreateQRCode {

									 public static void main(String[] args) {

									 int width = 300;

									 int height = 300;

									 String format = "gif";

									 String content = "www.baidu.com";

									 //定義二維碼的參數

									 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();

									 }

									 }

									}

解析二維碼

									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;

									//解析二維碼

									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();

									 }

									 }

									}