原创

生成二维码以及带logo二维码

相关工具类如下所示:

package com.ixincheng.modules.qrcode;

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 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.Result;
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;

public class QRCodeUtil {

private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
private static final int QRCODE_SIZE = 200; // 二维码尺寸,宽度和高度均是300
private static final int WIDTH = 80; //LOGO宽度
private static final int HEIGHT = 80; //LOGO高度
/**
* 生成二维码的方法
* @param content 目标url
* @param imgPath logo图片地址
* @param needCompress 是否压缩logo
* @return 二维码图片
* @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);//指定二维码的纠错等级为高级
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);//指定字符编码为“utf-8”
hints.put(EncodeHintType.MARGIN, 1); //设置图片的边距
//参数1:内容,目标url,参数2:固定写法,参数3:二维码的宽度,参数4:二维码的高度,参数5:二维码属性设置
BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
int width = bitMatrix.getWidth();//二维码的宽度
int height = bitMatrix.getHeight();//二维码的高度
BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);//生成的二维码image
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)) {//logo图片地址为null或空时
return image; //只返回二维码图片,无中间的logo
}
// 插入logo图片 参数1:二维码图片,参数2:logo图片地址,参数3:压缩图片
QRCodeUtil.insertImage(image, imgPath, needCompress);
return image;
}
/**
* 插入logo图片
* @param source 二维码图片
* @param imgPath LOGO图片地址
* @param needCompress 是否压缩
* @throws Exception
*/
private static void insertImage(BufferedImage source, String imgPath,boolean needCompress) throws Exception {
File file = new File(imgPath);//logo图片地址放入文件
if (!file.exists()) {
System.err.println("" + imgPath + " 该文件不存在!");
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩LOGO
if (width > WIDTH) { //如果上传logo宽 >60
width = WIDTH;
}
if (height > HEIGHT) { //如果上传logo高>60
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); // 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();
}
/**
* 生成二维码(内嵌LOGO)
* @param content 内容
* @param imgPath logo地址
* @param destPath 存放目录
* @param needCompress 是否压缩logo
* @param fileName 文件名称
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath, boolean needCompress,String fileName) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress); //生成二维码
mkdirs(destPath);
String file = fileName + ".jpg";
ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
}
/**
* 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)
* @param destPath 存放目录
*/
public static void mkdirs(String destPath) {
File file = new File(destPath);
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
/**
* 生成二维码(内嵌LOGO),没有压缩
*
* @param content 内容
* @param imgPath LOGO地址
* @param destPath 存储地址
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath,String fileName)throws Exception {
QRCodeUtil.encode(content, imgPath, destPath, false, fileName);
}

/**
* 生成二维码,无内嵌logo
*
* @param content 内容
* @param destPath 存储地址
* @param needCompress 是否压缩LOGO
* @throws Exception
*/
public static void encode(String content, String destPath,boolean needCompress,String fileName) throws Exception {
QRCodeUtil.encode(content, null, destPath, needCompress,fileName);
}
/**
* 生成二维码
*
* @param content 内容
* @param destPath 存储地址
* @throws Exception
*/
public static void encode(String content, String destPath,String fileName) throws Exception {
QRCodeUtil.encode(content, null, destPath, false,fileName);
}

/**
* 生成二维码(内嵌LOGO)
*
* @param content 内容
* @param imgPath LOGO地址
* @param output 输出流
* @param needCompress 是否压缩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);
}
/**
* 生成二维码
*
* @param content 内容
* @param output 输出流
* @throws Exception
*/
public static void encode(String content, OutputStream output)throws Exception {
QRCodeUtil.encode(content, null, output, false);
}

/**
* 解析二维码
* 按文件参数解析
* @param file 二维码图片
* @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);//指定字符编码为“utf-8”
result = new MultiFormatReader().decode(bitmap, hints);
String resultStr = result.getText();//二维码文本内容
return resultStr;
}

/**
* 解析二维码
* 按二维码图片地址解析
* @param path 二维码图片地址
* @return 不是二维码的内容返回null,是二维码直接返回识别的结果
* @throws Exception
*/
public static String decode(String path) throws Exception {
/**
* http://www.test.com/page/weizhi.html?devicesName=消防栓_WRbb&devicesNumber=2018092512094659f6aee7&hydrantId=d88219b0-c07e-11e8-87a3-2302a122c883
* &equipment=触发器01,撞到触发器;触发器02,开盖触发器;触发器03,漏水触发器;
*/
return QRCodeUtil.decode(new File(path));
}
}

测试main方法

public static void main(String[] args) {
//生成二维码
String content= "";//二维码内容(一般为网址)
String imgPath="";//logo地址
String destPath ="";//生成的二维码存放位置
String roomNum = "";//不能二维码参数
try {
QRCodeUtil.encode(content,imgPath,destPath, false,roomNum);
} catch (Exception e1) {
e1.printStackTrace();
}
}

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