java生成二维码图片（有logo），并在图片下方附文字

/**
* Created by Amber Wang on 2017/11/27 17:25.
*/

import java.awt.*;

public class LogoConfig {
// 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 = 2;
// logo大小默认为二维码照片的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 LogoConfig() {
this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
}

public LogoConfig(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;
}
}

/**
* Created by Amber Wang on 2017/11/27 17:24.
*/

import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

public final class MatrixToImageWriter {

private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;

private MatrixToImageWriter() {
}

public static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height - 50; y++) {
image.setRGB(x, y, matrix.get(x, y + 50) ? BLACK : WHITE);
}
}
return image;
}

public static BufferedImage writeToFile(BitMatrix matrix, String format)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
return image;
}

public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
}

}

/**
* 给二维码图片添加Logo
*
* @param barCodeImage
* @param logoPic
*/
public static BufferedImage addLogo_QRCode(BufferedImage barCodeImage, File logoPic, LogoConfig logoConfig) {
try {
if (!logoPic.isFile()) {
System.out.print("file not find !");
throw new IOException("file not find !");
}

/**
* 读取二维码图片，并构建绘图对象
*/
Graphics2D g = barCodeImage.createGraphics();

/**
* 读取Logo图片
*/
BufferedImage logo = ImageIO.read(logoPic);

int widthLogo = barCodeImage.getWidth() / logoConfig.getLogoPart();
int heightLogo = barCodeImage.getWidth() / logoConfig.getLogoPart(); //保持二维码是正方形的

// 计算图片放置位置
int x = (barCodeImage.getWidth() - widthLogo) / 2;
int y = (barCodeImage.getHeight() - heightLogo) / 2 - 50;

//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();

4000
return barCodeImage;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* @param pressText 文字
* @param newImg    带文字的图片
* @param image     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, BufferedImage image, 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())) - 10;
//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 - 30;

System.out.println("startX: " + startX);
System.out.println("startY: " + startY);
System.out.println("height: " + height);
System.out.println("width: " + width);
System.out.println("fontSize: " + fontSize);
System.out.println("pressText.length(): " + pressText.length());

try {
//            File file = new File(targetImg);
//            Image src = ImageIO.read(file);
int imageW = image.getWidth();
int imageH = image.getHeight();
//            BufferedImage image = new BufferedImage(imageW, imageH, BufferedImage.TYPE_INT_RGB);
Graphics g = image.createGraphics();
g.drawImage(image, 0, 0, imageW, imageH, null);
g.setColor(color);
g.setFont(new Font("粗体", Font.BOLD, 30));
g.drawString(pressText, startX, startY);
g.drawString("广 告 牌 0 1", startX + 30, startY + 30);
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) {
e.printStackTrace();
System.out.println(e);
}
}

//二维码表示的内容
private static String content = "http://www.changxingnanjing.com?qr_code=01900302|773f3c8f872bf34cc3fe97022720330e";

//存放logo的文件夹
private static String path = "E:/QRCodeImage";

public static void main(String args[]) {
try {
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, 2);
//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 = 352;//352
int height = 500;//612

//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 logoFile = new File(path, "logo.jpg");

//开始画二维码
BufferedImage barCodeImage = MatrixToImageWriter.writeToFile(bitMatrix, "jpg");

//在二维码中加入图片
LogoConfig logoConfig = new LogoConfig(); //LogoConfig中设置Logo的属性
BufferedImage image = addLogo_QRCode(barCodeImage, logoFile, logoConfig);

int font = 18; //字体大小
int fontStyle = 1; //字体风格

//用来存放带有logo+文字的二维码图片
String newImageWithText = path + "/imageWithText.jpg";
//附加在图片上的文字信息
String text = "0 1 1 0 9 0 2 9";

//在二维码下方添加文字（文字居中）
pressText(text, newImageWithText, image, fontStyle, Color.black, font, width, height);

} catch (Exception e) {
e.printStackTrace();
}
}