java 二维码生成和解析

<!-- 二维码   -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.0</version>
</dependency>

package com.hxkj.springboot.core.utils;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Hashtable;

import javax.imageio.ImageIO;

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.Result;
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;

public class QrCodeUtils {

/**
* @Title: encodeQrCode
* @Description: zixing普通二维码生成
* @param content
*            二维码内容
* @param prePath
*            保存路径前缀
* @param qrCodeName
*            二维码文件保存名称
* @return
* @return String
* @author huzhihui_c@qq.com
* @date 2016年10月10日 上午10:55:54
*/
public static String encodeQrCode(String content, String prePath, String qrCodeName) {
try {
int width = 300; // 二维码图片宽度
int height = 300; // 二维码图片高度
String format = "png";// 二维码的图片格式

Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); // 内容所使用字符集编码
hints.put(EncodeHintType.MARGIN, "2");
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
// 生成二维码
Path path = Paths.get(prePath, qrCodeName);
MatrixToImageWriter.writeToPath(bitMatrix, format, path);
System.out.println("success:-------------------生成二维码成功");
} catch (Exception e) {
System.out.println("error:-------------------生成二维码失败" + e.getMessage());
return null;
}
return qrCodeName;
}

/**
* @Title: decodeQrCode
* @Description: zixing二维码解析
* @param qrCodeUrl
* @return
* @return String
* @author huzhihui_c@qq.com
* @date 2016年10月10日 上午11:35:21
*/
public static String decodeQrCode(String qrCodeUrl) {
String retStr = "";
try {
BufferedImage bufferedImage = ImageIO.read(new FileInputStream(qrCodeUrl));
LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap bitmap = new BinaryBitmap(binarizer);
HashMap<DecodeHintType, Object> hintTypeObjectHashMap = new HashMap<>();
hintTypeObjectHashMap.put(DecodeHintType.CHARACTER_SET, "UTF-8");
Result result = new MultiFormatReader().decode(bitmap, hintTypeObjectHashMap);
retStr = result.getText();
System.out.println("success:-------------------二维码解析成功");
} catch (Exception e) {
System.out.println("error:-------------------二维码解析失败" + e.getMessage());
}
return retStr;
}

/**
* @Title: encodeLogoQrCode
* @Description:     生成带logo的二维码
* @param content
* @param prePath
* @param qrCodeName
* @param logoPath
* @return
* @return String
* @author huzhihui_c@qq.com
* @date 2016年10月10日 下午1:23:22
*/
public static String encodeLogoQrCode(String content, String prePath, String qrCodeName, String logoPath) {
try {
// 基本二维码生成
int width = 300; // 二维码图片宽度
int height = 300; // 二维码图片高度
String format = "png";// 二维码的图片格式

Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); // 内容所使用字符集编码
hints.put(EncodeHintType.MARGIN, "2");
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);

BufferedImage bufferQrCodeImage = MatrixToImageWriter.toBufferedImage(bitMatrix);// 普通二维码的图片流
BufferedImage bufferLogoImage = ImageIO.read(new File(logoPath));// logo文件
Graphics2D g2 = bufferQrCodeImage.createGraphics();
int matrixWidth = bufferQrCodeImage.getWidth();
int matrixHeigh = bufferQrCodeImage.getHeight();
g2.drawImage(bufferLogoImage, matrixWidth / 5 * 2, matrixHeigh / 5 * 2, matrixWidth / 5, matrixHeigh / 5,null);// logo绘制
BasicStroke stroke = new BasicStroke(5, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
g2.setStroke(stroke);// 设置笔画对象
// 指定弧度的圆角矩形
RoundRectangle2D.Float round = new RoundRectangle2D.Float(matrixWidth / 5 * 2, matrixHeigh / 5 * 2,matrixWidth / 5, matrixHeigh / 5, 20, 20);
g2.setColor(Color.white);
g2.draw(round);// 绘制圆弧矩形

// 设置logo 有一道灰色边框
BasicStroke stroke2 = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
g2.setStroke(stroke2);// 设置笔画对象
RoundRectangle2D.Float round2 = new RoundRectangle2D.Float(matrixWidth / 5 * 2 + 2, matrixHeigh / 5 * 2 + 2,
matrixWidth / 5 - 4, matrixHeigh / 5 - 4, 20, 20);
g2.setColor(new Color(128, 128, 128));
g2.draw(round2);// 绘制圆弧矩形

g2.dispose();
bufferQrCodeImage.flush();
ImageIO.write(bufferQrCodeImage, format, new File(prePath+qrCodeName));
System.out.println("success:-------------------生成带logo二维码成功");
} catch (Exception e) {
e.printStackTrace();
System.out.println("error:-------------------生成带logo二维码失败" + e.getMessage());
}

return "";
}

public static void main(String[] args) {
encodeLogoQrCode("nihao a ","D:/","aaa.jpg","D:/logo.jpg");
}
}