利用google开源工具生成二维码

Posted 2020-06-13

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);
}
}

 

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.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.OutputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;

import java.util.Date;

import java.util.HashMap;

import java.util.Hashtable;

import java.util.List;

import java.util.Map;

import java.util.Random;

import javax.imageio.ImageIO;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.poifs.filesystem.POIFSFileSystem;

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;

/**

* 二维码工具类

*

*/

public class QRCodeUtil {

private static final String CHARSET = "utf-8";

private static final String FORMAT_NAME = "JPG";

// 二维码尺寸

private static final int QRCODE_SIZE = 300;

// LOGO宽度

private static final int WIDTH = 60;

// LOGO高度

private static final int HEIGHT = 60;

private static BufferedImage createImage(String content, String imgPath,

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 (imgPath == null || "".equals(imgPath)) {

return image;

}

// 插入图片

QRCodeUtil.insertImage(image, imgPath, needCompress);

return image;

}

/**

* 插入LOGO

*

* @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);

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) {

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();
}

/**

* 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

* @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));

}

/**

* 生成嵌套logo的二维码

* @param content 二维码内容

* @param imgPath logo图片

* @param destPath 嵌套后生成新图片的目录

* @param fileName 新图片名称

* @param needCompress 是否截取

* @throws Exception

*/

public static void encodeFile(String content, String imgPath, String destPath, String fileName,

boolean needCompress) throws Exception {

BufferedImage image = QRCodeUtil.createImage(content, imgPath,

needCompress);

mkdirs(destPath);

ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+fileName));
}

/**

* 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)

* @author lanyuan

* Email: [email protected]

* @date 2013-12-11 上午10:16:36

* @param destPath 存放目录

*/

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();

}

}

 

/**

* 生成二维码(内嵌LOGO)

*

* @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)

throws Exception {

QRCodeUtil.encode(content, imgPath, destPath, false);

}

 

/**

* 生成二维码

*

* @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) throws Exception {

QRCodeUtil.encode(content, null, destPath, needCompress);

}

/**

* 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) throws Exception {

QRCodeUtil.encode(content, null, destPath, false);

}

 

/**

* 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

*

* @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<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();

hints.put(DecodeHintType.CHARACTER_SET, CHARSET);

result = new MultiFormatReader().decode(bitmap, hints);

String resultStr = result.getText();

return resultStr;

}

/**

* 解析二维码

*

* @param path

* 二维码图片地址

* @return

* @throws Exception

*/

public static String decode(String path) throws Exception {

return QRCodeUtil.decode(new File(path));

}

 

public static String[][] getData(File file, int ignoreRows)

throws FileNotFoundException, IOException {

List<String[]> result = new ArrayList<String[]>();

int rowSize = 0;

BufferedInputStream in = new BufferedInputStream(new FileInputStream(

file));

// 打开HSSFWorkbook

POIFSFileSystem fs = new POIFSFileSystem(in);

HSSFWorkbook wb = new HSSFWorkbook(fs);

HSSFCell cell = null;

for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {

HSSFSheet st = wb.getSheetAt(sheetIndex);

// 第一行为标题，不取

for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {

HSSFRow row = st.getRow(rowIndex);

if (row == null) {

continue;

}

int tempRowSize = row.getLastCellNum() + 1;

if (tempRowSize > rowSize) {

rowSize = tempRowSize;

}

String[] values = new String[rowSize];

Arrays.fill(values, "");

boolean hasValue = false;

for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {

String value = "";

cell = row.getCell(columnIndex);

if (cell != null) {

// 注意：一定要设成这个，否则可能会出现乱码

switch (cell.getCellType()) {

case HSSFCell.CELL_TYPE_STRING:

value = cell.getStringCellValue();

break;

case HSSFCell.CELL_TYPE_NUMERIC:

if (HSSFDateUtil.isCellDateFormatted(cell)) {

Date date = cell.getDateCellValue();

if (date != null) {

value = new SimpleDateFormat("yyyy-MM-dd")

.format(date);

} else {

value = "";

}

} else {

value = new DecimalFormat("0").format(cell

.getNumericCellValue());

}

break;

case HSSFCell.CELL_TYPE_FORMULA:

// 导入时如果为公式生成的数据则无值

if (!cell.getStringCellValue().equals("")) {

value = cell.getStringCellValue();

} else {

value = cell.getNumericCellValue() + "";

}

break;

case HSSFCell.CELL_TYPE_BLANK:

break;

case HSSFCell.CELL_TYPE_ERROR:

value = "";

break;

case HSSFCell.CELL_TYPE_BOOLEAN:

value = (cell.getBooleanCellValue() == true ? "Y"

: "N");

break;

default:

value = "";

}

}

if (columnIndex == 0 && value.trim().equals("")) {

break;

}

values[columnIndex] = rightTrim(value);

hasValue = true;

}

if (hasValue) {

result.add(values);

}

}

}

in.close();

String[][] returnArray = new String[result.size()][rowSize];

for (int i = 0; i < returnArray.length; i++) {

returnArray[i] = (String[]) result.get(i);

}

return returnArray;

}

public static String rightTrim(String str) {

if (str == null) {

return "";

}

int length = str.length();

for (int i = length - 1; i >= 0; i--) {

if (str.charAt(i) != 0x20) {

break;

}

length--;

}

return str.substring(0, length);

}

 

public static void main(String[] args) throws Exception {

QRCodeUtil.encodeFile("http://fujian.njcdata.com:80/iweb/jyfx/wsdc/dywjdj.so?type=externalDj&ffid=Wt62S9E88R5mXu5d5origi", "d://fujianlogo//仰恩大学.png","d://fujiantwocode//","仰恩大学.png",true);
QRCodeUtil.encodeFile("http://fujian.njcdata.com:80/iweb/jyfx/wsdc/dywjdj.so?type=externalDj&ffid=KN3syFv5yMvnD9n2891TaZ", "d://fujianlogo//漳州城市职业学院.png","d://fujiantwocode//","漳州城市职业学院.png",true);
QRCodeUtil.encodeFile("http://fujian.njcdata.com:80/iweb/jyfx/wsdc/dywjdj.so?type=externalDj&ffid=6rJpc1L8iTvF8EBtPGW48E", "d://fujianlogo//福州大学.png","d://fujiantwocode//","福州大学.png",true);

/* File file = new File("f:/123.xls");

String[][] result = getData(file, 1);

int rowLength = result.length;

for(int i=0;i<rowLength;i++) {

QRCodeUtil.encodeFile(""+result[i][1].trim()+"", "d://fujianlogo//"+result[i][0].trim()+".png","d://fujiantwocode//",""+result[i][0].trim()+".png",true);

}

System.out.println("success");*/

}

}