java生成带logo的二维码,自定义大小,logo路径取服务器端

时间:2022-11-18 22:18:15
package com.qishunet.eaehweb.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.net.HttpURLConnection;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;

import javax.imageio.ImageIO;

import net.sf.cglib.core.CollectionUtils;

import org.apache.tiles.request.collection.CollectionUtil;

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.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";
// 二维码尺寸
private static int QRCODE_SIZE = 132;
// LOGO宽度
private static int WIDTH = 34;
// LOGO高度
private static int HEIGHT = 34;

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;
}
// 插入图片
QRCodeUtil.insertImage(image, imgPath, needCompress);
return image;
}


private static void insertImage(BufferedImage source, String imgPath,
boolean needCompress) throws Exception {
URL url
= null;
HttpURLConnection httpUrl
= null;
try {
url
= new URL(imgPath);
httpUrl
= (HttpURLConnection) url.openConnection();
}
catch (Exception e) {
System.out.println(
""+imgPath+"打开logo连接失败");
}
Image src
= ImageIO.read(httpUrl.getInputStream());
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩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); // 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();
}

/**
*
*
@param content url
*
@param imgPath logo图片的路径
*
@param userid 用户id
*
@param map 二维码大小参数
*
@param needCompress 是否压缩
*
@return
*
@throws Exception
*/
public static String encode(String content, String imgPath,Long userid,Map<String,Integer> map,boolean needCompress) throws Exception {

String path
= SystemPropertiesUtil.get("uploadIp");

String uploadPath
= SystemPropertiesUtil.get("uploadPath");

String suploadPath
= "/userImg/"+ (userid % 10) + "/"+ userid + "/";

String uploadpath
= uploadPath + suploadPath;

String fileName
= "qrCode" + userid + ".png";

File file
= new File(uploadpath + fileName);

if (file.exists()) {
return path + suploadPath + fileName;
}

if (!map.isEmpty()){
if (map.containsKey("size")){
QRCODE_SIZE
= map.get("size");
}
if (map.containsKey("width")){
WIDTH
= map.get("width");
}
if (map.containsKey("size")){
HEIGHT
= map.get("height");
}
}
try {
BufferedImage image
= QRCodeUtil.createImage(content, imgPath,needCompress);
mkdirs(uploadpath);
ImageIO.write(image, FORMAT_NAME,
new File(""+file));
}
catch (Exception e) {
e.printStackTrace();
return null;
}
return path + suploadPath + fileName;
}


public static void 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();
}
}

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);
}


public static void encode(String content, OutputStream output)
throws Exception {
QRCodeUtil.encode(content,
null, output, false);
}


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;
}


public static String decode(String path) throws Exception {
return QRCodeUtil.decode(new File(path));
}


public static void main(String[] args) throws Exception {
String text
= "http://www.dans88.com.cn";
//QRCodeUtil.encode(text, "d:/MyWorkDoc/my180.jpg", "d:/MyWorkDoc", true);
}
}
package com.qishunet.eaehweb.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);
}
}