- 本文非原創(chuàng)，在哪找的忘了。
- 使用Google的zxing，當(dāng)前最新的版本是
3.3.3,可以訪問(wèn)maven倉(cāng)庫(kù)自行查看。
1、添加maven依賴
<!-- google qrc -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.3</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.3</version>
</dependency>
2、編寫(xiě)幫助類
package com.demo.jpa.util;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;
/**
* 二維碼工具類
* Created by fuli.shen on 2017/3/31.
*/
public class QRCodeUtil {
private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
// 二維碼尺寸
private static final int QRCODE_SIZE = 3189;
// LOGO寬度
private static final int WIDTH = 640;
// LOGO高度
private static final int HEIGHT = 640;
/**
* 生成二維碼的方法
*
* @param content 目標(biāo)URL
* @param imgPath LOGO圖片地址
* @param needCompress 是否壓縮LOGO
* @return 二維碼圖片
* @throws Exception
*/
private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
Hashtable hints = new Hashtable();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
hints.put(EncodeHintType.MARGIN, 1);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
int width = bitMatrix.getWidth();
int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
if (imgPath == null || "".equals(imgPath)) {
return image;
}
// 插入圖片
QRCodeUtil.insertImage(image, imgPath, needCompress);
return image;
}
/**
* 插入LOGO
*
* @param source 二維碼圖片
* @param imgPath LOGO圖片地址
* @param needCompress 是否壓縮
* @throws Exception
*/
private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
File file = new File(imgPath);
if (!file.exists()) {
System.err.println("" + imgPath + " 該文件不存在！");
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 壓縮LOGO
if (width > WIDTH) {
width = WIDTH;
}
if (height > HEIGHT) {
height = HEIGHT;
}
Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null); // 繪制縮小后的圖
g.dispose();
src = image;
}
// 插入LOGO
Graphics2D graph = source.createGraphics();
int x = (QRCODE_SIZE - width) / 2;
int y = (QRCODE_SIZE - height) / 2;
// logo背景
int tmp = 120;
int arc = 120;
graph.setColor(Color.WHITE);
graph.fillRoundRect(x - tmp, y - tmp, width + tmp * 2, width + tmp * 2, arc, arc);
// logo邊框
Shape shape = new RoundRectangle2D.Float(x - tmp, y - tmp, width + tmp * 2, width + tmp * 2, arc, arc);
graph.setStroke(new BasicStroke(6f));
graph.setColor(new Color(0, 166, 254));
graph.draw(shape);
// logo
graph.drawImage(src, x, y, width, height, null);
graph.dispose();
}
/**
* 生成二維碼(內(nèi)嵌LOGO)
*
* @param content 內(nèi)容
* @param imgPath LOGO地址
* @param destPath 存放目錄
* @param needCompress 是否壓縮LOGO
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
mkdirs(destPath);
String file = new Random().nextInt(99999999) + ".jpg";
ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
}
/**
* 生成二維碼(內(nèi)嵌LOGO)
*
* @param content 內(nèi)容
* @param imgPath LOGO地址
* @param destPath 存放目錄
* @param destName 保存名稱（帶后綴）
* @param needCompress 是否壓縮LOGO
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath, String destName, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
mkdirs(destPath);
ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + destName));
}
/**
* 當(dāng)文件夾不存在時(shí)，mkdirs會(huì)自動(dòng)創(chuàng)建多層目錄，區(qū)別于mkdir．(mkdir如果父目錄不存在則會(huì)拋出異常)
*
* @param destPath 存放目錄
*/
public static void mkdirs(String destPath) {
File file = new File(destPath);
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
/**
* 生成二維碼(內(nèi)嵌LOGO)
*
* @param content 內(nèi)容
* @param imgPath LOGO地址
* @param destPath 存儲(chǔ)地址
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath) throws Exception {
QRCodeUtil.encode(content, imgPath, destPath, false);
}
/**
* 生成二維碼
*
* @param content 內(nèi)容
* @param destPath 存儲(chǔ)地址
* @param needCompress 是否壓縮LOGO
* @throws Exception
*/
public static void encode(String content, String destPath, boolean needCompress) throws Exception {
QRCodeUtil.encode(content, null, destPath, needCompress);
}
/**
* 生成二維碼
*
* @param content 內(nèi)容
* @param destPath 存儲(chǔ)地址
* @throws Exception
*/
public static void encode(String content, String destPath) throws Exception {
QRCodeUtil.encode(content, null, destPath, false);
}
/**
* 生成二維碼(內(nèi)嵌LOGO)
*
* @param content 內(nèi)容
* @param imgPath LOGO地址
* @param output 輸出流
* @param needCompress 是否壓縮LOGO
* @throws Exception
*/
public static void encode(String content, String imgPath, OutputStream output, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath,
needCompress);
ImageIO.write(image, FORMAT_NAME, output);
}
/**
* 生成二維碼
*
* @param content 內(nèi)容
* @param output 輸出流
* @throws Exception
*/
public static void encode(String content, OutputStream output) throws Exception {
QRCodeUtil.encode(content, null, output, false);
}
/**
* 解析二維碼
*
* @param file 二維碼圖片
* @return
* @throws Exception
*/
public static String decode(File file) throws Exception {
BufferedImage image;
image = ImageIO.read(file);
if (image == null) {
return null;
}
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
Hashtable hints = new Hashtable();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
result = new MultiFormatReader().decode(bitmap, hints);
String resultStr = result.getText();
return resultStr;
}
/**
* 解析二維碼
*
* @param path 二維碼圖片地址
* @return 不是二維碼的內(nèi)容返回null, 是二維碼直接返回識(shí)別的結(jié)果
* @throws Exception
*/
public static String decode(String path) throws Exception {
return QRCodeUtil.decode(new File(path));
}
public static void main(String[] args) {
// 生成二維碼
String text = "www.baidu.com";
// String imagePath = System.getProperty("user.dir") + "\\logo.png";
String imagePath = "com/demo/jpa/util/logo.png";
// E:\DEVELOPE\Code\Demo\genqrc\src\main\java\com\demo\genqrc\logo.png
String destPath = System.getProperty("user.dir");
try {
QRCodeUtil.encode(text, imagePath, destPath, true);
} catch (Exception e) {
e.printStackTrace();
}
//驗(yàn)證圖片是否含有二維碼
// String destPath1 = System.getProperty("user.dir") + "/data/3.jpg";
// try {
// String result = decode(dp);
// System.out.println(result);
// } catch (Exception e) {
// e.printStackTrace();
// System.out.println(dp + "不是二維碼");
// }
}
}
