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A Simple Tool Operations Class
package com.luues.util.qrcode;
import com.luues.util.logs.LogUtil;
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.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.EnumMap;
import java.util.HashMap;
import java.util.Map;
public class QRCodeUtil {
/**
* 绘制二维码
*
* @param contents 二维码内容
* @return image 二维码图片
*/
public static BufferedImage encodeImg(String contents) {
BufferedImage image = null;
try {
BitMatrix matrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);
//1.1去白边
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);
}
}
}
//2
int width = resMatrix.getWidth();
int height = resMatrix.getHeight();
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, resMatrix.get(x, y) == true ?
Color.BLACK.getRGB() : Color.WHITE.getRGB());
}
}
/*image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
int width = matrix.getWidth();
int height = matrix.getHeight();
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
}
}*/
} catch (Exception e) {
LogUtil.error("生成二维码失败" + e.getMessage());
}
return image;
}
/**
* 绘制二维码
*
* @param contents 二维码内容
* @param logPath log地址
* @return image 二维码图片
*/
public static BufferedImage encodeImgLogo(String contents, String logPath) {
BufferedImage image = null;
try {
BitMatrix matrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);
//1.1去白边
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);
}
}
}
int width = resMatrix.getWidth();
int height = resMatrix.getHeight();
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, resMatrix.get(x, y) == true ?
Color.BLACK.getRGB() : Color.WHITE.getRGB());
}
}
//获取画笔
Graphics2D g = image.createGraphics();
//读取logo图片
BufferedImage logo = ImageIO.read(new File(logPath));
//设置二维码大小，太大，会覆盖二维码，此处20%
int logoWidth = logo.getWidth(null) > image.getWidth() * 2 / 10 ? (image.getWidth() * 2 / 10) : logo.getWidth(null);
int logoHeight = logo.getHeight(null) > image.getHeight() * 2 / 10 ? (image.getHeight() * 2 / 10) : logo.getHeight(null);
//设置logo图片放置位置
//中心
int x = (image.getWidth() - logoWidth) / 2;
int y = (image.getHeight() - logoHeight) / 2;
//右下角，15为调整值
// int x = twodimensioncode.getWidth() - logoWidth-15;
// int y = twodimensioncode.getHeight() - logoHeight-15;
//开始合并绘制图片
g.drawImage(logo, x, y, logoWidth, logoHeight, null);
g.drawRoundRect(x, y, logoWidth, logoHeight, 15, 15);
//logo边框大小
g.setStroke(new BasicStroke(2));
//logo边框颜色
g.setColor(Color.WHITE);
g.drawRect(x, y, logoWidth, logoHeight);
g.dispose();
logo.flush();
image.flush();
} catch (Exception e) {
LogUtil.error("生成二维码失败" + e.getMessage());
}
return image;
}
/**
* 二维码绘制logo
*
* @param twodimensioncodeImg 二维码图片文件
* @param logoImg logo图片文件
*/
public static BufferedImage encodeImgLogo(File twodimensioncodeImg, File logoImg) {
BufferedImage twodimensioncode = null;
try {
if (!twodimensioncodeImg.isFile() || !logoImg.isFile()) {
LogUtil.error("输入非图片");
return null;
}
//读取二维码图片
twodimensioncode = ImageIO.read(twodimensioncodeImg);
//获取画笔
Graphics2D g = twodimensioncode.createGraphics();
//读取logo图片
BufferedImage logo = ImageIO.read(logoImg);
//设置二维码大小，太大，会覆盖二维码，此处20%
int logoWidth = logo.getWidth(null) > twodimensioncode.getWidth() * 2 / 10 ? (twodimensioncode.getWidth() * 2 / 10) : logo.getWidth(null);
int logoHeight = logo.getHeight(null) > twodimensioncode.getHeight() * 2 / 10 ? (twodimensioncode.getHeight() * 2 / 10) : logo.getHeight(null);
//设置logo图片放置位置
//中心
int x = (twodimensioncode.getWidth() - logoWidth) / 2;
int y = (twodimensioncode.getHeight() - logoHeight) / 2;
//右下角，15为调整值
// int x = twodimensioncode.getWidth() - logoWidth-15;
// int y = twodimensioncode.getHeight() - logoHeight-15;
//开始合并绘制图片
g.drawImage(logo, x, y, logoWidth, logoHeight, null);
g.drawRoundRect(x, y, logoWidth, logoHeight, 15, 15);
//logo边框大小
g.setStroke(new BasicStroke(2));
//logo边框颜色
g.setColor(Color.WHITE);
g.drawRect(x, y, logoWidth, logoHeight);
g.dispose();
logo.flush();
twodimensioncode.flush();
} catch (Exception e) {
LogUtil.error("二维码绘制logo失败");
}
return twodimensioncode;
}
/**
* 图片绘制其他图片
*
* @param twodimensioncodeImg 主图片文件
* @param Img 另一个图片文件
*/
public static BufferedImage encodeOtherImg(File twodimensioncodeImg, File Img, int yy) {
BufferedImage twodimensioncode = null;
try {
if (!twodimensioncodeImg.isFile() || !Img.isFile()) {
LogUtil.error("输入非图片");
return null;
}
//读取二维码图片
twodimensioncode = ImageIO.read(twodimensioncodeImg);
//获取画笔
Graphics2D g = twodimensioncode.createGraphics();
//读取logo图片
BufferedImage logo = ImageIO.read(Img);
//设置二维码大小，太大，会覆盖二维码，此处20%
int logoWidth = 300;//logo.getWidth(null) > twodimensioncode.getWidth()*2 /10 ? (twodimensioncode.getWidth()*2 /10) : logo.getWidth(null);
int logoHeight = 300;//logo.getHeight(null) > twodimensioncode.getHeight()*2 /10 ? (twodimensioncode.getHeight()*2 /10) : logo.getHeight(null);
//设置logo图片放置位置
//中心
int x = (twodimensioncode.getWidth() - logoWidth) / 2;
int y = (twodimensioncode.getHeight() - logoHeight) / 2;
//右下角，15为调整值
// int x = twodimensioncode.getWidth() - logoWidth-15;
// int y = twodimensioncode.getHeight() - logoHeight-15;
//开始合并绘制图片
g.drawImage(logo, x, y + yy, logoWidth, logoHeight, null);
g.drawRoundRect(x, y + yy, logoWidth, logoHeight, 15, 15);
//logo边框大小
g.setStroke(new BasicStroke(2));
//logo边框颜色
g.setColor(Color.WHITE);
g.drawRect(x, y + yy, logoWidth, logoHeight);
g.dispose();
logo.flush();
twodimensioncode.flush();
} catch (Exception e) {
LogUtil.error("二维码绘制logo失败");
}
return twodimensioncode;
}
public static String Decode(File file) {
BufferedImage image;
try {
image = ImageIO.read(file);
LuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map hints = new HashMap();
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码
return result.getText();
} catch (IOException e) {
} catch (NotFoundException e) {
}
return null;
}
private static int width = 400;
private static int height = 400;
// 二维码颜色
private static final int BLACK = 0xFF000000;// 0xFFFF0000，红色
// 二维码背景色
private static final int WHITE = 0xFFFFFFFF;// 0xFF0000FF，蓝色
// 注：二维码颜色色差大，扫描快，但如果"BLACK'设置为黑色外其他颜色，可能无法扫描
// 二维码格式参数
private static final EnumMap hints = new EnumMap(EncodeHintType.class);
static {
/*
* 二维码的纠错级别(排错率),4个级别： L (7%)、 M (15%)、 Q (25%)、 H (30%)(最高H)
* 纠错信息同样存储在二维码中，纠错级别越高，纠错信息占用的空间越多，那么能存储的有用讯息就越少；共有四级； 选择M，扫描速度快。
*/
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 二维码边界空白大小 1,2,3,4 (4为默认,最大)
hints.put(EncodeHintType.MARGIN, 0);
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
hints.put(EncodeHintType.MAX_SIZE, 350);
hints.put(EncodeHintType.MIN_SIZE, 150);
}
}