1、jar包： zxing-core-3.3.0.jar http://mvnrepository.com/artifact/com.google.zxing/core
ZXing-javase-3.3.0.jar http://mvnrepository.com/artifact/com.google.zxing/javase
BufferedImageLuminanceSource.java
package com.webos.util;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import com.google.zxing.LuminanceSource;
public class BufferedImageLuminanceSource extends LuminanceSource {
private final BufferedImage image;
private final int left;
private final int top;
public BufferedImageLuminanceSource(BufferedImage image) {
this(image, 0, 0, image.getWidth(), image.getHeight());
}
public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
super(width, height);
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
if (left + width > sourceWidth || top + height > sourceHeight) {
throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
}
for (int y = top; y < top + height; y++) {
for (int x = left; x < left + width; x++) {
if ((image.getRGB(x, y) & 0xFF000000) == 0) {
image.setRGB(x, y, 0xFFFFFFFF); // = white
}
}
}
this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
this.image.getGraphics().drawImage(image, 0, 0, null);
this.left = left;
this.top = top;
}
public byte[] getRow(int y, byte[] row) {
if (y < 0 || y >= getHeight()) {
throw new IllegalArgumentException("Requested row is outside the image: " + y);
}
int width = getWidth();
if (row == null || row.length < width) {
row = new byte[width];
}
image.getRaster().getDataElements(left, top + y, width, 1, row);
return row;
}
public byte[] getMatrix() {
int width = getWidth();
int height = getHeight();
int area = width * height;
byte[] matrix = new byte[area];
image.getRaster().getDataElements(left, top, width, height, matrix);
return matrix;
}
public boolean isCropSupported() {
return true;
}
public LuminanceSource crop(int left, int top, int width, int height) {
return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
}
public boolean isRotateSupported() {
return true;
}
public LuminanceSource rotateCounterClockwise() {
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
Graphics2D g = rotatedImage.createGraphics();
g.drawImage(image, transform, null);
g.dispose();
int width = getWidth();
return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
}
}
立即学习“Java免费学习笔记（深入）”；
QRCodeUtil.java
package com.webos.util;
import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
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;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/**
* @ClassName: QRCodeUtil
* @Description: 二维码编码
* @author Liuy
* @date 2016年7月9日 下午3:03:24
*
*/
public class QRCodeUtil {
// 设置二维码编码格式
private static final String CHARSET = "utf-8";
// 保存的二维码格式
private static final String FORMAT_NAME = "JPG";
// 二维码尺寸
private static final int QRCODE_SIZE = 800;
// LOGO宽度
private static final int LOGO_WIDTH = 80;
// LOGO高度
private static final int LOGO_HEIGHT = 80;
/**
* @Title: createImage
* @Description: 将二维码内容创建到Image流
* @param content 二维码内容
* @param imgPath logo图片地址
* @param needCompress 是否压缩logo图片大小
* @return
* @throws Exception 参数说明
* @return BufferedImage 返回类型
* @throws
*/
private static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
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 (logoPath == null || "".equals(logoPath)) {
return image;
}
// 插入logo
QRCodeUtil.insertImage(image, logoPath, needCompress);
return image;
}
/**
* @Title: insertImage
* @Description: 将logo插入到二维码中
* @param source 二维码Image流
* @param imgPath logo地址
* @param needCompress 是否压缩大小
* @throws Exception 参数说明
* @return void 返回类型
* @throws
*/
private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception {
File file = new File(logoPath);
if (!file.exists()) {
System.err.println("" + logoPath + " 该文件不存在！");
return;
}
Image src = ImageIO.read(new File(logoPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩LOGO
if (width > LOGO_WIDTH) {
width = LOGO_WIDTH;
}
if (height > LOGO_HEIGHT) {
height = LOGO_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); // 绘制缩小后的图
g.dispose();
src = image;
}
// 插入LOGO
Graphics2D graph = source.createGraphics();
int x = (QRCODE_SIZE - width) / 2;
int y = (QRCODE_SIZE - height) / 2;
graph.drawImage(src, x, y, width, height, null);
Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
graph.setStroke(new BasicStroke(3f));
graph.draw(shape);
graph.dispose();
}
/**
* @Title: mkdirs
* @Description: 创建文件夹
* @param destPath 文件夹地址
* @return void 返回类型
* @throws
*/
private static boolean mkdirs(String destPath) {
File file = new File(destPath);
// 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
return true;
}
return false;
}
/**
* @Title: encode
* @Description: 生成二维码
* @param content 二维码内容
* @param imgPath logo图片地址
* @param destPath 目标保存地址
* @param needCompress 是否压缩logo图片大小
* @throws Exception 参数说明
* @return void 返回类型
* @throws
*/
private static void encode(String content, String logoPath, String destPath, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
if (mkdirs(destPath)) {
String file = new Random().nextInt(99999999) + ".jpg";
ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
}
}
/**
* @Title: encode
* @Description: 生成二维码
* @param content 二维码内容
* @param destPath 目标保存地址
* @throws Exception 参数说明
* @return void 返回类型
* @throws
*/
public static void encode(String content, String destPath) throws Exception {
QRCodeUtil.encode(content, null, destPath, false);
}
/**
* @Title: encode
* @Description: 生成二维码
* @param content 二维码内容
* @param imgPath logo图片地址
* @param output 输出流
* @param needCompress 是否压缩logo图片大小
* @throws Exception 参数说明
* @return void 返回类型
* @throws
*/
public static void encode(String content, String logoPath, OutputStream output, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
ImageIO.write(image, FORMAT_NAME, output);
}
/**
* @Title: encode
* @Description: 生成二维码
* @param content 二维码内容
* @param output 输出流
* @throws Exception 参数说明
* @return void 返回类型
* @throws
*/
public static void encode(String content, OutputStream output) throws Exception {
QRCodeUtil.encode(content, null, output, false);
}
/**
* @Title: decode
* @Description: 对二维码解码
* @param file 文件对象
* @return 解码后的二维码内容字符串
* @throws Exception 参数说明
* @return String 返回类型
* @throws
*/
private 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));
Hashtable<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
return new MultiFormatReader().decode(bitmap, hints).getText();
}
/**
* @Title: decode
* @Description: 对二维码解码
* @param path 文件路径
* @return
* @throws Exception 参数说明
* @return String 返回类型
* @throws
*/
public static String decode(String path) throws Exception {
return QRCodeUtil.decode(new File(path));
}
}
立即学习“Java免费学习笔记（深入）”；
QRCodeServlet.java
package com.webos.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.webos.util.QRCodeUtil;
/*
* Servlet implementation class QRCodeServlet
*/
@WebServlet("/QRCodeServlet")
public class QRCodeServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/*
* @see HttpServlet#HttpServlet()
*/
public QRCodeServlet() {
super();
}
/*
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
String text = "http://www.baidu.com?timestamp=" + System.currentTimeMillis();
QRCodeUtil.encode(text, response.getOutputStream());
} catch (Exception e) {
e.printStackTrace();
}
}
/*
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
立即学习“Java免费学习笔记（深入）”；
以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持PHP中文网！
更多java ZXing生成二维码及条码实例分享相关文章请关注PHP中文网！
