Java生成二维码工具类（利用zxing实现）
本篇博客用于自己的小计，仅供参考。简单粗暴，直接上代码
需要引用的jar
工具类
FolderUtils.java
import java.io.File;
import org.apache.commons.io.FilenameUtils;
/**
* 文件夹工具
*
*/
public class FolderUtils {
/**
* 创建完整路径
*
* @param path a {@link java.lang.String} object.
*/
public static final void mkdirs(final String... path) {
for (String foo : path) {
final String realPath = FilenameUtils.normalizeNoEndSeparator(foo, true);
final File folder = new File(realPath);
if (!folder.exists() || folder.isFile()) {
folder.mkdirs();
}
}
}
}MatrixToImageWriterEx.java
import java.awt.BasicStroke;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import org.apache.commons.io.IOUtils;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageConfig;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
class MatrixToImageWriterEx {
private static final MatrixToLogoImageConfig DEFAULT_CONFIG = new MatrixToLogoImageConfig();
/**
* 根据内容生成二维码数据
*
* @param content
* 二维码文字内容[为了信息安全性，一般都要先进行数据加密]
* @param width
* 二维码照片宽度
* @param height
* 二维码照片高度
* @param errorCorrectionLevel
* 纠错等级
* @return a {@link com.google.zxing.common.BitMatrix} object.
* @since 0.0.7
*/
public static BitMatrix createQRCode(String content, int width, int height,
ErrorCorrectionLevel errorCorrectionLevel) {
Hashtable hints = new Hashtable();
// 设置字符编码
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
// 指定纠错等级
hints.put(EncodeHintType.ERROR_CORRECTION, errorCorrectionLevel);
BitMatrix matrix = null;
try {
matrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
} catch (WriterException e) {
e.printStackTrace();
}
return matrix;
}
/**
* 根据内容生成二维码数据
*
* @param content
* 二维码文字内容[为了信息安全性，一般都要先进行数据加密]
* @param width
* 二维码照片宽度
* @param height
* 二维码照片高度
* @return a {@link com.google.zxing.common.BitMatrix} object.
* @since 0.0.7
*/
public static BitMatrix createQRCode(String content, int width, int height) {
return createQRCode(content, width, height, ErrorCorrectionLevel.H);
}
/**
* 写入二维码、以及将照片logo写入二维码中
*
* @param matrix
* 要写入的二维码
* @param format
* 二维码照片格式
* @param imagePath
* 二维码照片保存路径
* @param logoPath
* logo路径
* @throws java.io.IOException
* if any.
* @since 0.0.7
*/
public static void writeToFile(BitMatrix matrix, String format,
String imagePath, String logoPath) throws IOException {
InputStream input = null;
try {
input = new BufferedInputStream(new FileInputStream(logoPath));
writeToFile(matrix, format, imagePath, input);
} catch (IOException e) {
throw e;
} finally {
IOUtils.closeQuietly(input);
}
}
/**
*
* writeToFile.
*
*
* @param matrix
* a {@link com.google.zxing.common.BitMatrix} object.
* @param format
* a {@link java.lang.String} object.
* @param imagePath
* a {@link java.lang.String} object.
* @param logoInputStream
* a {@link java.io.InputStream} object.
* @throws java.io.IOException
* if any.
* @since 0.0.7
*/
public static void writeToFile(BitMatrix matrix, String format,
String imagePath, InputStream logoInputStream) throws IOException {
MatrixToImageWriter.writeToPath(matrix, format, new File(imagePath).toPath(), new MatrixToImageConfig());
// 添加logo图片, 此处一定需要重新进行读取，而不能直接使用二维码的BufferedImage 对象
BufferedImage img = ImageIO.read(new File(imagePath));
MatrixToImageWriterEx.overlapImage(img, format, imagePath, logoInputStream, DEFAULT_CONFIG);
}
/**
* 写入二维码、以及将照片logo写入二维码中
*
* @param matrix
* 要写入的二维码
* @param format
* 二维码照片格式
* @param imagePath
* 二维码照片保存路径
* @param logoPath
* logo路径
* @param logoConfig
* logo配置对象
* @throws java.io.IOException
* if any.
* @since 0.0.7
*/
public static void writeToFile(BitMatrix matrix, String format, String imagePath, InputStream logoPath,
MatrixToLogoImageConfig logoConfig) throws IOException {
MatrixToImageWriter.writeToPath(matrix, format, new File(imagePath).toPath(), new MatrixToImageConfig());
// 添加logo图片, 此处一定需要重新进行读取，而不能直接使用二维码的BufferedImage 对象
BufferedImage img = ImageIO.read(new File(imagePath));
MatrixToImageWriterEx.overlapImage(img, format, imagePath, logoPath, logoConfig);
}
/**
* 将照片logo添加到二维码中间
*
* @param image
* 生成的二维码照片对象
* @param imagePath
* 照片保存路径
* @param imagePath
* 照片保存路径
* @param imagePath
* 照片保存路径
* @param imagePath
* 照片保存路径
* @param imagePath
* 照片保存路径
* @param imagePath
* 照片保存路径
* @param logoInputStream
* logo输入流
* @param formate
* 照片格式
* @param logoConfig
* a {@link cn.yicha.commons.qrcode.MatrixToLogoImageConfig}
* object.
* @since 0.0.7
*/
public static void overlapImage(BufferedImage image, String formate,
String imagePath, InputStream logoInputStream,
MatrixToLogoImageConfig logoConfig) {
try {
BufferedImage logo = ImageIO.read(logoInputStream);
Graphics2D g = image.createGraphics();
// 考虑到logo照片贴到二维码中，建议大小不要超过二维码的1/5;
int width = image.getWidth() / logoConfig.getLogoPart();
int height = image.getHeight() / logoConfig.getLogoPart();
// logo起始位置，此目的是为logo居中显示
int x = (image.getWidth() - width) / 2;
int y = (image.getHeight() - height) / 2;
// 绘制图
g.drawImage(logo, x, y, width, height, null);
// 给logo画边框
// 构造一个具有指定线条宽度以及 cap 和 join 风格的默认值的实心 BasicStroke
g.setStroke(new BasicStroke(logoConfig.getBorder()));
g.setColor(logoConfig.getBorderColor());
g.drawRect(x, y, width, height);
g.dispose();
// 写入logo照片到二维码
ImageIO.write(image, formate, new File(imagePath));
} catch (Exception e) {
e.printStackTrace();
}
}
} MatrixToLogoImageConfig.java
import java.awt.Color;
class MatrixToLogoImageConfig {
// logo默认边框颜色
/** Constant DEFAULT_BORDERCOLOR */
public static final Color DEFAULT_BORDERCOLOR = Color.RED;
// logo默认边框宽度
/** Constant DEFAULT_BORDER=2 */
public static final int DEFAULT_BORDER = 2;
// logo大小默认为照片的1/5
/** Constant DEFAULT_LOGOPART=5 */
public static final int DEFAULT_LOGOPART = 5;
private final int border = DEFAULT_BORDER;
private final Color borderColor;
private final int logoPart;
/**
* Creates a default config with on color {@link #BLACK} and off color
* {@link #WHITE}, generating normal black-on-white barcodes.
*
* @since 0.0.7
*/
public MatrixToLogoImageConfig() {
this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
}
/**
*
* Constructor for MatrixToLogoImageConfig.
*
*
* @param borderColor
* a {@link java.awt.Color} object.
* @param logoPart
* a int.
* @since 0.0.7
*/
public MatrixToLogoImageConfig(Color borderColor, int logoPart) {
this.borderColor = borderColor;
this.logoPart = logoPart;
}
/**
*
* Getter for the field borderColor.
*
*
* @return a {@link java.awt.Color} object.
* @since 0.0.7
*/
public Color getBorderColor() {
return borderColor;
}
/**
*
* Getter for the field border.
*
*
* @return a int.
* @since 0.0.7
*/
public int getBorder() {
return border;
}
/**
*
* Getter for the field logoPart.
*
*
* @return a int.
* @since 0.0.7
*/
public int getLogoPart() {
return logoPart;
}
}最重要的QrcodeUtils.java
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import javax.imageio.ImageIO;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.ArrayUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.SystemUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Reader;
import com.google.zxing.ReaderException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
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 QrcodeUtils {
private static final transient Logger LOGGER = LoggerFactory.getLogger(QrcodeUtils.class);
private static transient String DEFAULT_FORMAT = "jpg";
private static transient int DEFAULT_WIDTH = 200;
private static transient int DEFAULT_HEIGHT = 200;
static {
try {
final String[] foo = new String[] { "240", "240" };
final String format = "jpg";
if (StringUtils.isNotBlank(format)) {
DEFAULT_FORMAT = StringUtils.strip(format).toLowerCase();
}
if (ArrayUtils.isNotEmpty(foo) && foo.length == 2) {
Integer tmpWidth = Integer.valueOf(foo[0]);
Integer tmpHeight = Integer.valueOf(foo[1]);
if (tmpWidth > 0 && tmpHeight > 0) {
DEFAULT_WIDTH = tmpWidth;
DEFAULT_HEIGHT = tmpHeight;
} else {
LOGGER.warn("qrcode size must be lager than zero.");
}
}
} catch (Throwable e) {
LOGGER.warn("read default qrcode size config error: ", e);
}
}
/**
* 生成二维码（无中间logo）
*
* @param content 二维码文本内容
* @param destFile 输出文件
*/
public static final void gen(final String content, File destFile) throws Exception {
gen(content, destFile, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param destFile 目的文件
* @param logoFile 中间logo文件
*
*/
public static final void gen(final String content, final File destFile, final File logoFile) throws Exception {
gen(content, destFile, logoFile, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param destFile 目的文件
* @param logoFile 中间logo文件
* @param width 宽度
* @param height 高度
*/
public static final void gen(final String content, final File destFile, final File logoFile, int width, int height)
throws Exception {
FolderUtils.mkdirs(destFile.getParent());
OutputStream output = null;
InputStream input = null;
try {
output = new BufferedOutputStream(new FileOutputStream(destFile));
if (logoFile != null && logoFile.exists() && logoFile.isFile()) {
input = new BufferedInputStream(new FileInputStream(logoFile));
}
gen(content, output, input, width, height);
} catch (FileNotFoundException e) {
e.printStackTrace();
throw new Exception(e);
} finally {
IOUtils.closeQuietly(output);
IOUtils.closeQuietly(input);
}
}
/**
* 生成二维码（无中间logo）
*
* @param content 二维码文本内容
* @param destFile 输出文件
* @param width 宽度
* @param height 高度
*/
public static final void gen(final String content, File destFile, int width, int height) throws Exception {
FolderUtils.mkdirs(destFile.getParent());
OutputStream output = null;
try {
output = new BufferedOutputStream(new FileOutputStream(destFile));
gen(content, output, width, height);
} catch (FileNotFoundException e) {
e.printStackTrace();
throw new Exception(e);
} catch (Exception e) {
throw e;
} finally {
IOUtils.closeQuietly(output);
}
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param output 输出流
*/
public static final void gen(final String content, final OutputStream output) throws Exception {
gen(content, output, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param output 输出流
* @param logoInput 中间logo输入流，为空时中间无logo
*/
public static final void gen(final String content, final OutputStream output, final InputStream logoInput)
throws Exception {
gen(content, output, logoInput, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param output 输出流
* @param logoInput 中间logo输入流，为空时中间无logo
* @param width 宽度
* @param height 高度
*/
public static final void gen(final String content, final OutputStream output, final InputStream logoInput,
int width, int height) throws Exception {
gen(content, output, logoInput, width, height, ErrorCorrectionLevel.M);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param output 输出流
* @param logoInput 中间logo输入流，为空时中间无logo
* @param width 宽度
* @param height 高度
* @param errorCorrectionLevel 容错级别
*/
public static final void gen(final String content, final OutputStream output, final InputStream logoInput,
int width, int height, ErrorCorrectionLevel errorCorrectionLevel) throws Exception {
if (StringUtils.isEmpty(content)) {
throw new IllegalArgumentException("qr code content cannot be empty.");
}
if (output == null) {
throw new IllegalArgumentException("qr code output stream cannot be null.");
}
final BitMatrix matrix = MatrixToImageWriterEx.createQRCode(content, width, height, errorCorrectionLevel);
if (logoInput == null) {
try {
MatrixToImageWriter.writeToStream(matrix, DEFAULT_FORMAT, output);
return;
} catch (IOException e) {
e.printStackTrace();
throw new Exception(e);
}
}
final MatrixToLogoImageConfig logoConfig = new MatrixToLogoImageConfig(Color.BLUE, 4);
final String destPath = FilenameUtils.normalizeNoEndSeparator(
SystemUtils.getJavaIoTmpDir() + File.separator + UUID.randomUUID().toString() + ".tmp");
InputStream tmpInput = null;
final File destFile = new File(destPath);
try {
MatrixToImageWriterEx.writeToFile(matrix, DEFAULT_FORMAT, destPath, logoInput, logoConfig);
tmpInput = new BufferedInputStream(new FileInputStream(destFile));
IOUtils.copy(tmpInput, output);
} catch (IOException e) {
e.printStackTrace();
throw new Exception(e);
} finally {
IOUtils.closeQuietly(tmpInput);
destFile.delete();
}
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param output 输出流
* @param width 宽度
* @param height 高度
*/
public static final void gen(final String content, final OutputStream output, int width, int height)
throws Exception {
gen(content, output, null, width, height);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param destPath 输出文件路径
*/
public static final void gen(final String content, final String destPath) throws Exception {
gen(content, destPath, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param destPath 输出文件路径
* @param width 宽度
* @param height 高度
*/
public static final void gen(final String content, final String destPath, int width, int height) throws Exception {
gen(content, new File(destPath), width, height);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param destPath 目的文件路径
* @param logoPath 中间logo文件路径
*/
public static final void gen(final String content, final String destPath, final String logoPath) throws Exception {
gen(content, destPath, logoPath, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
/**
* 生成二维码
*
* @param content 二维码文本内容
* @param destPath 目的文件路径
* @param logoPath 中间logo文件路径
* @param width 宽度
* @param height 高度
*/
public static final void gen(final String content, final String destPath, final String logoPath, int width,
int height) throws Exception {
File foo = new File(destPath);
File bar = new File(logoPath);
gen(content, foo, bar, width, height);
}
/**
* 解析二维码
*
* @param input 二维码输入流
*/
public static final String parse(InputStream input) throws Exception {
Reader reader = null;
BufferedImage image;
try {
image = ImageIO.read(input);
if (image == null) {
throw new Exception("cannot read image from inputstream.");
}
final LuminanceSource source = new BufferedImageLuminanceSource(image);
final BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
final Map hints = new HashMap();
hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
// 解码设置编码方式为：utf-8，
reader = new MultiFormatReader();
return reader.decode(bitmap, hints).getText();
} catch (IOException e) {
e.printStackTrace();
throw new Exception("parse QR code error: ", e);
} catch (ReaderException e) {
e.printStackTrace();
throw new Exception("parse QR code error: ", e);
}
}
/**
* 解析二维码
*
* @param url 二维码url
*/
public static final String parse(URL url) throws Exception {
InputStream in = null;
try {
in = url.openStream();
return parse(in);
} catch (IOException e) {
e.printStackTrace();
throw new Exception("parse QR code error: ", e);
} finally {
IOUtils.closeQuietly(in);
}
}
/**
* 解析二维码
*
* @param file 二维码图片文件
*/
public static final String parse(File file) throws Exception {
InputStream in = null;
try {
in = new BufferedInputStream(new FileInputStream(file));
return parse(in);
} catch (FileNotFoundException e) {
e.printStackTrace();
throw new Exception("parse QR code error: ", e);
} finally {
IOUtils.closeQuietly(in);
}
}
/**
* 解析二维码
*
* @param filePath 二维码图片文件路径
*/
public static final String parse(String filePath) throws Exception {
InputStream in = null;
try {
in = new BufferedInputStream(new FileInputStream(filePath));
return parse(in);
} catch (FileNotFoundException e) {
e.printStackTrace();
throw new Exception("parse QR code error: ", e);
} finally {
IOUtils.closeQuietly(in);
}
}
}