首先需要引入两个jar文件:
下面就是生成二维码的工具类:
public class CreatrQrCode{
// logo默认边框颜色
public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
// logo默认边框宽度
public static final int DEFAULT_BORDER = 1;
// logo大小默认为照片的1/6
public static final int DEFAULT_LOGOPART = 6;
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.
*/
public CreatrQrCode() {
this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
}
public demo02(Color borderColor, int logoPart) {
this.borderColor = borderColor;
this.logoPart = logoPart;
}
public Color getBorderColor() {
return borderColor;
}
public int getBorder() {
return border;
}
public int getLogoPart() {
return logoPart;
}
/**
* 给二维码图片添加Logo
*
* @param qrPic
* @param logoPic
*/
public static void addLogo_QRCode(File qrPic, File logoPic, CreatrQrCode logoConfig) {
try {
if (!qrPic.isFile() || !logoPic.isFile()) {
System.out.print("file not find !");
System.exit(0);
}
/**
* 读取二维码图片，并构建绘图对象
*/
BufferedImage image = ImageIO.read(qrPic);
Graphics2D g = image.createGraphics();
/**
* 读取Logo图片
*/
BufferedImage logo = ImageIO.read(logoPic);
int widthLogo = image.getWidth() / logoConfig.getLogoPart();
// int heightLogo = image.getHeight()/logoConfig.getLogoPart();
int heightLogo = image.getWidth() / logoConfig.getLogoPart(); //保持二维码是正方形的
// 计算图片放置位置
int x = (image.getWidth() - widthLogo) / 2;
int y = (image.getHeight() - heightLogo) / 2;
//开始绘制图片
g.drawImage(logo, x, y, widthLogo, heightLogo, null);
g.drawRoundRect(x, y, widthLogo, heightLogo, 10, 10);
g.setStroke(new BasicStroke(logoConfig.getBorder()));
g.setColor(logoConfig.getBorderColor());
g.drawRect(x, y, widthLogo, heightLogo);
g.dispose();
ImageIO.write(image, "jpeg", new File("D:/ceshi/789.png"));
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* @param pressText 文字
* @param newImg 带文字的图片
* @param targetImg 需要添加文字的图片
* @param fontStyle
* @param color
* @param fontSize
* @param width
* @param height
* @为图片添加文字
*/
public static void pressText(String pressText, String newImg, String targetImg, int fontStyle, Color color, int fontSize, int width, int height) {
//计算文字开始的位置
//x开始的位置：（图片宽度-字体大小*字的个数）/2
int startX = (width - (fontSize * pressText.length())) / 2;
//y开始的位置：图片高度-（图片高度-图片宽度）/2
int startY = height - (height - width) / 2;
try {
public class CreatrQrCode {
// logo默认边框颜色
public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
// logo默认边框宽度
public static final int DEFAULT_BORDER = 1;
// logo大小默认为照片的1/6
public static final int DEFAULT_LOGOPART = 6;
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.
* 在颜色{@ link #黑}和颜色上创建一个默认配置
* {@link # WHITE}，生成正常的黑白条码。
*/
public CreatrQrCode() {
this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
}
public CreatrQrCode(Color borderColor, int logoPart) {
this.borderColor = borderColor;
this.logoPart = logoPart;
}
public Color getBorderColor() {
return borderColor;
}
public int getBorder() {
return border;
}
public int getLogoPart() {
return logoPart;
}
/**
* 给二维码图片添加Logo
*
* @param qrPic
* @param logoPic
*/
public static void addLogo_QRCode(File qrPic, File logoPic, CreatrQrCode creatrQrCode) {
try {
if (!qrPic.isFile() || !logoPic.isFile()) {
System.out.print("file not find !");
System.exit(0);
}
/**
* 读取二维码图片，并构建绘图对象
*/
BufferedImage image = ImageIO.read(qrPic);
Graphics2D g = image.createGraphics();
/**
* 读取Logo图片
*/
BufferedImage logo = ImageIO.read(logoPic);
int widthLogo = image.getWidth() / creatrQrCode.getLogoPart();
// int heightLogo = image.getHeight()/logoConfig.getLogoPart();
int heightLogo = image.getWidth() / creatrQrCode.getLogoPart(); //保持二维码是正方形的
// 计算图片放置位置
int x = (image.getWidth() - widthLogo) / 2;
int y = (image.getHeight() - heightLogo) / 2;
//开始绘制图片
g.drawImage(logo, x, y, widthLogo, heightLogo, null);
g.drawRoundRect(x, y, widthLogo, heightLogo, 10, 10);
g.setStroke(new BasicStroke(creatrQrCode.getBorder()));
g.setColor(creatrQrCode.getBorderColor());
g.drawRect(x, y, widthLogo, heightLogo);
g.dispose();
ImageIO.write(image, "jpeg", new File("D:/ceshi/789.png"));
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* @param pressText 文字
* @param newImg 带文字的图片
* @param targetImg 需要添加文字的图片
* @param fontStyle
* @param color
* @param fontSize
* @param width
* @param height
* @为图片添加文字
*/
public static void pressText(String pressText, String newImg, String targetImg, int fontStyle, Color color, int fontSize, int width, int height) {
//计算文字开始的位置
//x开始的位置：（图片宽度-字体大小*字的个数）/2
int startX = (width - (fontSize * pressText.length())) / 300;
//y开始的位置：图片高度-（图片高度-图片宽度）/2
int startY = height - (height - width) / 3;
try {
File file = new File(targetImg);
Image src = ImageIO.read(file);
int imageW = src.getWidth(null);
int imageH = src.getHeight(null);
BufferedImage image = new BufferedImage(imageW, imageH, BufferedImage.TYPE_INT_RGB);
Graphics g = image.createGraphics();
g.drawImage(src, 0, 0, imageW, imageH, null);
g.setColor(color);
g.setFont(new Font(null, fontStyle, fontSize));
g.drawString(pressText, startX, startY);
g.dispose();
FileOutputStream out = new FileOutputStream(newImg);
ImageIO.write(image, "JPEG", out);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(image);
out.close();
System.out.println("image press success");
} catch (Exception e) {
System.out.println(e);
}
}
}
在主函数中测试一下我们的的工具类有没有问题:
public static void main(String args[]) {
try {
//二维码表示的内容
String content = "http://www.baidu.com";
//存放logo的文件夹
String path = "D:/ceshi/";
MultiFormatWriter
multiFormatWriter = new MultiFormatWriter();
@SuppressWarnings("rawtypes")
Map hints = new HashMap();
//设置UTF-8， 防止中文乱码
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
//设置二维码四周白色区域的大小
hints.put(EncodeHintType.MARGIN,0);
//设置二维码的容错性
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
//width:图片完整的宽;height:图片完整的高
//因为要在二维码下方附上文字，所以把图片设置为长方形（高大于宽）
int width = 400;
int height = 460;
//画二维码，记得调用multiFormatWriter.encode()时最后要带上hints参数，不然上面设置无效
BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
//qrcFile用来存放生成的二维码图片（无logo，无文字）
File qrcFile = new File(path,"wutu.jpg");
//logoFile准备放在二维码中的图片(path:图片路径,图片名称)
File logoFile = new File(path,"shilinwei.jpg");
//开始画二维码
MatrixToImageWriter.writeToFile(bitMatrix, "jpg", qrcFile);
//在二维码中加入图片
CreatrQrCode creatrQrCode = new CreatrQrCode(); //LogoConfig中设置Logo的属性
addLogo_QRCode(qrcFile, logoFile, creatrQrCode);
int font = 20; //字体大小
int fontStyle = 4; //字体风格
//用来存放的带有logo+文字的二维码图片
String newImageWithText = "D:/ceshi/456.jpg";
//带有logo二维码图片
String targetImage = "D:/ceshi/789.png";
//附加在图片上的文字信息
String text = "my name is Shi Linwei";
//在二维码下方添加文字（文字居中）
pressText(text, newImageWithText, targetImage, fontStyle, Color.red, font, width, height) ;
} catch (Exception e) {
e.printStackTrace();
}
}
原文链接：https://blog.csdn.net/qq_36481052/article/details/78922725