生成二维码到本地
1.循环生成多张二维码
for (int i = 1; i <= 1000; i++) {
String code = UUID.randomUUID().toString().toUpperCase().replaceAll("-", "");
BottleSn bottleSn = new BottleSn();
bottleSn.setCode(code);
bottleSnRepository.save(bottleSn);
QRCodeUtil.generateQRImage("http://pangtun.silver-fortune.com.cn/h5/trackbottle/" + code, "D:/Pic/logo-pangtun.png", "D:/Pic/Picture/", i + ".png", "png");
}
2.工具类
package com.sfec.snmgr.track.utils;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageConfig;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.sfec.snmgr.track.vo.QRCodeParams;
public class QRCodeUtil {
private static int width = 120; //二维码宽度
private static int height = 120; //二维码高度
private static int onColor = 0xFF000000; //前景色
private static int offColor = 0xFFFFFFFF; //背景色
private static int margin = 1; //白边大小,取值范围0~4
private static ErrorCorrectionLevel level = ErrorCorrectionLevel.L; //二维码容错率
/**
* 生成二维码
* @param params
* QRCodeParams属性:txt、fileName、filePath不得为空;
*/
public static void generateQRImage(QRCodeParams params)throws Exception{
if(params == null
|| params.getFileName() == null
|| params.getFilePath() == null
|| params.getTxt() == null){
throw new Exception("参数错误");
}
try{
initData(params);
String imgPath = params.getFilePath();
String imgName = params.getFileName();
String txt = params.getTxt();
if(params.getLogoPath() != null && !"".equals(params.getLogoPath().trim())){
generateQRImage(txt, params.getLogoPath(), imgPath, imgName, params.getSuffixName());
}else{
generateQRImage(txt, imgPath, imgName, params.getSuffixName());
}
}catch(Exception e){
e.printStackTrace();
}
}
/**
* 生成二维码
* @param txt //二维码内容
* @param imgPath //二维码保存物理路径
* @param imgName //二维码文件名称
* @param suffix //图片后缀名
*/
public static void generateQRImage(String txt, String imgPath, String imgName, String suffix){
File filePath = new File(imgPath);
if(!filePath.exists()){
filePath.mkdirs();
}
File imageFile = new File(imgPath,imgName);
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
// 指定纠错等级
hints.put(EncodeHintType.ERROR_CORRECTION, level);
// 指定编码格式
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
hints.put(EncodeHintType.MARGIN, margin); //设置白边
try {
MatrixToImageConfig config = new MatrixToImageConfig(onColor, offColor);
BitMatrix bitMatrix = new MultiFormatWriter().encode(txt,BarcodeFormat.QR_CODE, width, height, hints);
// bitMatrix = deleteWhite(bitMatrix);
MatrixToImageWriter.writeToPath(bitMatrix, suffix, imageFile.toPath(), config);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 生成带logo的二维码图片
* @param txt //二维码内容
* @param logoPath //logo绝对物理路径
* @param imgPath //二维码保存绝对物理路径
* @param imgName //二维码文件名称
* @param suffix //图片后缀名
* @throws Exception
*/
public static void generateQRImage(String txt, String logoPath, String imgPath, String imgName, String suffix) throws Exception{
File filePath = new File(imgPath);
if(!filePath.exists()){
filePath.mkdirs();
}
if(imgPath.endsWith("/")){
imgPath += imgName;
}else{
imgPath += "/"+imgName;
}
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.ERROR_CORRECTION, level);
hints.put(EncodeHintType.MARGIN, margin); //设置白边
BitMatrix bitMatrix = new MultiFormatWriter().encode(txt, BarcodeFormat.QR_CODE, width, height, hints);
File qrcodeFile = new File(imgPath);
writeToFile(bitMatrix, suffix, qrcodeFile, logoPath);
}
/**
*
* @param matrix 二维码矩阵相关
* @param format 二维码图片格式
* @param file 二维码图片文件
* @param logoPath logo路径
* @throws IOException
*/
public static void writeToFile(BitMatrix matrix,String format,File file,String logoPath) throws IOException {
BufferedImage image = toBufferedImage(matrix);
Graphics2D gs = image.createGraphics();
int ratioWidth = image.getWidth()*2/10;
int ratioHeight = image.getHeight()*2/10;
//载入logo
Image img = ImageIO.read(new File(logoPath));
int logoWidth = img.getWidth(null)>ratioWidth?ratioWidth:img.getWidth(null);
int logoHeight = img.getHeight(null)>ratioHeight?ratioHeight:img.getHeight(null);
int x = (image.getWidth() - logoWidth) / 2;
int y = (image.getHeight() - logoHeight) / 2;
gs.drawImage(img, x, y, logoWidth, logoHeight, null);
gs.setColor(Color.black);
gs.setBackground(Color.WHITE);
gs.dispose();
img.flush();
if(!ImageIO.write(image, format, file)){
throw new IOException("Could not write an image of format " + format + " to " + file);
}
}
public static BufferedImage toBufferedImage(BitMatrix matrix){
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for(int x=0;x<width;x++){
for(int y=0;y<height;y++){
image.setRGB(x, y, matrix.get(x, y) ? onColor : offColor);
}
}
return image;
}
public static BitMatrix deleteWhite(BitMatrix matrix){
int[] rec = matrix.getEnclosingRectangle();
int resWidth = rec[2] + 1;
int resHeight = rec[3] + 1;
BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
resMatrix.clear();
for (int i = 0; i < resWidth; i++) {
for (int j = 0; j < resHeight; j++) {
if (matrix.get(i + rec[0], j + rec[1]))
resMatrix.set(i, j);
}
}
return resMatrix;
}
private static void initData(QRCodeParams params){
if(params.getWidth() != null){
width = params.getWidth();
}
if(params.getHeight() != null){
height = params.getHeight();
}
if(params.getOnColor() != null){
onColor = params.getOnColor();
}
if(params.getOffColor() != null){
offColor = params.getOffColor();
}
if(params.getLevel() != null){
level = params.getLevel();
}
}
public static BufferedImage getBufferImage(String txt, String logoPath) throws Exception{
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.ERROR_CORRECTION, level);
hints.put(EncodeHintType.MARGIN, margin); //设置白边
BitMatrix bitMatrix = new MultiFormatWriter().encode(txt, BarcodeFormat.QR_CODE, width, height, hints);
BufferedImage image = toBufferedImage(bitMatrix);
Graphics2D gs = image.createGraphics();
int ratioWidth = image.getWidth()*2/10;
int ratioHeight = image.getHeight()*2/10;
//载入logo
Image img = ImageIO.read(new File(logoPath));
int logoWidth = img.getWidth(null)>ratioWidth?ratioWidth:img.getWidth(null);
int logoHeight = img.getHeight(null)>ratioHeight?ratioHeight:img.getHeight(null);
int x = (image.getWidth() - logoWidth) / 2;
int y = (image.getHeight() - logoHeight) / 2;
gs.drawImage(img, x, y, logoWidth, logoHeight, null);
gs.setColor(Color.black);
gs.setBackground(Color.WHITE);
gs.dispose();
return image;
}
}