java--实现将文字生成二维码图片，并在中间附上logo，下方附上文字

 1 package QRCode;
 2 
 3 import com.google.zxing.common.BitMatrix;
 4 import javax.imageio.ImageIO;
 5 import java.io.File;
 6 import java.io.OutputStream;
 7 import java.io.IOException;
 8 import java.awt.image.BufferedImage;
 9 
10 public final class MatrixToImageWriter {
11 
12     private static final int BLACK = 0xFF000000;
13     private static final int WHITE = 0xFFFFFFFF;
14 
15     private MatrixToImageWriter() {}
16 
17 
18     public static BufferedImage toBufferedImage(BitMatrix matrix) {
19         int width = matrix.getWidth();
20         int height = matrix.getHeight();
21         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
22         for (int x = 0; x < width; x++) {
23             for (int y = 0; y < height; y++) {
24                 image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
25             }
26         }
27         return image;
28     }
29 
30 
31     public static void writeToFile(BitMatrix matrix, String format, File file)
32             throws IOException {
33         BufferedImage image = toBufferedImage(matrix);
34         if (!ImageIO.write(image, format, file)) {
35             throw new IOException("Could not write an image of format " + format + " to " + file);
36         }
37     }
38 
39 
40     public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
41             throws IOException {
42         BufferedImage image = toBufferedImage(matrix);
43         if (!ImageIO.write(image, format, stream)) {
44             throw new IOException("Could not write an image of format " + format);
45         }
46     }
47 
48 }

 1 package QRCode;
 2 
 3 import java.awt.Color;
 4 
 5 public class LogoConfig {
 6     // logo默认边框颜色
 7     public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
 8     // logo默认边框宽度
 9     public static final int DEFAULT_BORDER = 2;
10     // logo大小默认为照片的1/6
11     public static final int DEFAULT_LOGOPART = 6;
12  
13     private final int border = DEFAULT_BORDER;
14     private final Color borderColor;
15     private final int logoPart;
16  
17     /**
18      * Creates a default config with on color {@link #BLACK} and off color
19      * {@link #WHITE}, generating normal black-on-white barcodes.
20      */
21     public LogoConfig()
22     {
23         this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
24     }
25  
26     public LogoConfig(Color borderColor, int logoPart)
27     {
28         this.borderColor = borderColor;
29         this.logoPart = logoPart;
30     }
31  
32     public Color getBorderColor()
33     {
34         return borderColor;
35     }
36  
37     public int getBorder()
38     {
39         return border;
40     }
41  
42     public int getLogoPart()
43     {
44         return logoPart;
45     }
46 }

 1 /**
 2      * 给二维码图片添加Logo
 3      * 
 4      * @param qrPic
 5      * @param logoPic
 6      */
 7     public static void addLogo_QRCode(File qrPic, File logoPic, LogoConfig logoConfig)
 8     {
 9         try
10         {
11             if (!qrPic.isFile() || !logoPic.isFile())
12             {
13                 System.out.print("file not find !");
14                 System.exit(0);
15             }
16 
17             /**
18              * 读取二维码图片，并构建绘图对象
19              */
20             BufferedImage image = ImageIO.read(qrPic);
21             Graphics2D g = image.createGraphics();
22 
23             /**
24              * 读取Logo图片
25              */
26             BufferedImage logo = ImageIO.read(logoPic);
27 
28             int widthLogo = image.getWidth()/logoConfig.getLogoPart(); 
29         //    int    heightLogo = image.getHeight()/logoConfig.getLogoPart();
30             int    heightLogo = image.getWidth()/logoConfig.getLogoPart(); //保持二维码是正方形的
31 
32             // 计算图片放置位置
33             int x = (image.getWidth() - widthLogo) / 2;
34             int y = (image.getHeight() - heightLogo) / 2 ;        
35 
36 
37             //开始绘制图片
38             g.drawImage(logo, x, y, widthLogo, heightLogo, null);
39             g.drawRoundRect(x, y, widthLogo, heightLogo, 10, 10);
40             g.setStroke(new BasicStroke(logoConfig.getBorder()));
41             g.setColor(logoConfig.getBorderColor());
42             g.drawRect(x, y, widthLogo, heightLogo);
43 
44             g.dispose();
45 
46             ImageIO.write(image, "jpeg", new File("D:/newPic.jpg"));
47         }
48         catch (Exception e)
49         {
50             e.printStackTrace();
51         }
52     }

 1 /**
 2      * @为图片添加文字
 3      * @param pressText 文字
 4      * @param newImg    带文字的图片
 5      * @param targetImg 需要添加文字的图片
 6      * @param fontStyle 
 7      * @param color
 8      * @param fontSize
 9      * @param width
10      * @param heigh
11      */
12     public static void pressText(String pressText, String newImg, String targetImg, int fontStyle, Color color, int fontSize, int width, int height) {
13         
14         //计算文字开始的位置
15         //x开始的位置：（图片宽度-字体大小*字的个数）/2
16         int startX = (width-(fontSize*pressText.length()))/2;
17         //y开始的位置：图片高度-（图片高度-图片宽度）/2
18         int startY = height-(height-width)/2;        
19         
20         try {
21             File file = new File(targetImg);
22             Image src = ImageIO.read(file);
23             int imageW = src.getWidth(null);
24             int imageH = src.getHeight(null);
25             BufferedImage image = new BufferedImage(imageW, imageH, BufferedImage.TYPE_INT_RGB);
26             Graphics g = image.createGraphics();
27             g.drawImage(src, 0, 0, imageW, imageH, null);
28             g.setColor(color);
29             g.setFont(new Font(null, fontStyle, fontSize));
30             g.drawString(pressText, startX, startY);
31             g.dispose();
32 
33             FileOutputStream out = new FileOutputStream(newImg);
34             ImageIO.write(image, "JPEG", out);
35             JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
36             encoder.encode(image);
37             out.close();
38             System.out.println("image press success");
39         } catch (Exception e) {
40             System.out.println(e);
41         }
42     }

 1 public static void main(String args[]) {
 2         try {
 3             //二维码表示的内容
 4             String content = "http://www.cnblogs.com/";
 5             
 6             //存放logo的文件夹
 7             String path = "E:/QRCodeImage";
 8 
 9             MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
10 
11             @SuppressWarnings("rawtypes")
12             Map hints = new HashMap();
13             
14             //设置UTF-8， 防止中文乱码
15             hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
16             //设置二维码四周白色区域的大小
17             hints.put(EncodeHintType.MARGIN,1);
18             //设置二维码的容错性
19             hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); 
20             
21             //width:图片完整的宽;height:图片完整的高
22             //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）
23             int width = 400;
24             int height = 450;
25             
26             //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
27             BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
28             
29             //qrcFile用来存放生成的二维码图片（无logo，无文字）
30             File qrcFile = new File(path,"myPicture.jpg");
31             //logoFile用来存放带有logo的二维码图片（二维码+logo，无文字）
32             File logoFile = new File(path,"logo.jpg");
33             
34             //开始画二维码
35             MatrixToImageWriter.writeToFile(bitMatrix, "jpg", qrcFile);
36 
37             //在二维码中加入图片
38             LogoConfig logoConfig = new LogoConfig(); //LogoConfig中设置Logo的属性
39             addLogo_QRCode(qrcFile, logoFile, logoConfig);
40             
41     
42             int font = 18; //字体大小
43             int fontStyle = 1; //字体风格
44             
45             //用来存放带有logo+文字的二维码图片
46             String newImageWithText = "D:/imageWithText.jpg"; 
47             //带有logo的二维码图片
48             String targetImage = "D:/newPic.jpg";
49             //附加在图片上的文字信息
50             String text = "文字测试一二三四五六123";
51 
52             //在二维码下方添加文字（文字居中）
53             pressText(text, newImageWithText, targetImage, fontStyle, Color.BLUE, font,  width,  height) ;
54 
55         } catch (Exception e) {
56             e.printStackTrace();
57         }
58     }