java实现生成二维码

1. package com.cn.test;
2. import java.awt.Graphics2D;
3. import java.awt.geom.AffineTransform;
4. import java.awt.image.BufferedImage;
5. import com.google.zxing.LuminanceSource;
6. public class BufferedImageLuminanceSource extends LuminanceSource{
7. private final BufferedImage image;
8. private final int left;
9. private final int top;
12. public BufferedImageLuminanceSource(BufferedImage image) {
13. this(image, 0, 0, image.getWidth(), image.getHeight());
14. }
15. public BufferedImageLuminanceSource(BufferedImage image, int left,
16. int top, int width, int height) {
17. super(width, height);
18. int sourceWidth = image.getWidth();
19. int sourceHeight = image.getHeight();
20. if (left + width > sourceWidth || top + height > sourceHeight) {
21. throw new IllegalArgumentException(
22. "Crop rectangle does not fit within image data.");
23. }
24. for (int y = top; y < top + height; y++) {
25. for (int x = left; x < left + width; x++) {
26. if ((image.getRGB(x, y) & 0xFF000000) == 0) {
27. image.setRGB(x, y, 0xFFFFFFFF); // = white
28. }
29. }
30. }
31. this.image = new BufferedImage(sourceWidth, sourceHeight,
32. BufferedImage.TYPE_BYTE_GRAY);
33. this.image.getGraphics().drawImage(image, 0, 0, null);
34. this.left = left;
35. this.top = top;
36. }
38. public byte[] getRow(int y, byte[] row) {
39. if (y < 0 || y >= getHeight()) {
40. throw new IllegalArgumentException(
41. "Requested row is outside the image: " + y);
42. }
43. int width = getWidth();
44. if (row == null || row.length < width) {
45. row = new byte[width];
46. }
47. image.getRaster().getDataElements(left, top + y, width, 1, row);
48. return row;
49. }
51. public byte[] getMatrix() {
52. int width = getWidth();
53. int height = getHeight();
54. int area = width * height;
55. byte[] matrix = new byte[area];
56. image.getRaster().getDataElements(left, top, width, height, matrix);
57. return matrix;
58. }
60. public boolean isCropSupported() {
61. return true;
62. }
64. public LuminanceSource crop(int left, int top, int width, int height) {
65. return new BufferedImageLuminanceSource(image, this.left + left,
66. this.top + top, width, height);
67. }
69. public boolean isRotateSupported() {
70. return true;
71. }
73. public LuminanceSource rotateCounterClockwise() {
74. int sourceWidth = image.getWidth();
75. int sourceHeight = image.getHeight();
76. AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0,
77. 0.0, 0.0, sourceWidth);
78. BufferedImage rotatedImage = new BufferedImage(sourceHeight,
79. sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
80. Graphics2D g = rotatedImage.createGraphics();
81. g.drawImage(image, transform, null);
82. g.dispose();
83. int width = getWidth();
84. return new BufferedImageLuminanceSource(rotatedImage, top,
85. sourceWidth - (left + width), getHeight(), width);
86. }
87. }

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1. package com.cn.test;
2. import java.awt.BasicStroke;
3. import java.awt.Graphics;
4. import java.awt.Graphics2D;
5. import java.awt.Image;
6. import java.awt.Shape;
7. import java.awt.geom.RoundRectangle2D;
8. import java.awt.image.BufferedImage;
9. import java.io.File;
10. import java.io.OutputStream;
11. import java.text.SimpleDateFormat;
12. import java.util.Date;
13. import java.util.Hashtable;
14. import java.util.Random;
15. import javax.imageio.ImageIO;
16. import com.google.zxing.BarcodeFormat;
17. import com.google.zxing.BinaryBitmap;
18. import com.google.zxing.DecodeHintType;
19. import com.google.zxing.EncodeHintType;
20. import com.google.zxing.MultiFormatReader;
21. import com.google.zxing.MultiFormatWriter;
22. import com.google.zxing.Result;
23. import com.google.zxing.common.BitMatrix;
24. import com.google.zxing.common.HybridBinarizer;
25. import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
27. public class QRCodeUtil {
28. //二维码编码
29. private static final String CHARSET = "utf-8";
30. //二维码图片格式
31. private static final String FORMAT_NAME = "JPG";
32. // 二维码尺寸
33. private static final int QRCODE_SIZE = 300;
34. // LOGO宽度
35. private static final int WIDTH = 60;
36. // LOGO高度
37. private static final int HEIGHT = 60;
38. private static BufferedImage createImage(String content, String imgPath,
39. boolean needCompress) throws Exception {
40. // 生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
41. Hashtable hints = new Hashtable();
42. //设置二维码容错率，从大到小依次H，Q，M,L，
43. hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
44. //设置编码类型
45. hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
46. //设置二维码编辑宽度
47. hints.put(EncodeHintType.MARGIN, 1);
48. BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
49. BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
50. int width = bitMatrix.getWidth();
51. int height = bitMatrix.getHeight();
52. // 二维矩阵转为一维像素数组,也就是一直横着排了
53. BufferedImage image = new BufferedImage(width, height,
54. BufferedImage.TYPE_INT_RGB);
55. for (int x = 0; x < width; x++) {
56. for (int y = 0; y < height; y++) {
57. image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
58. : 0xFFFFFFFF);
59. }
60. }
61. if (imgPath == null || "".equals(imgPath)) {
62. return image;
63. }
64. // 插入图片
65. QRCodeUtil.insertImage(image, imgPath, needCompress);
66. return image;
67. }
69. private static void insertImage(BufferedImage source, String imgPath,
70. boolean needCompress) throws Exception {
71. File file = new File(imgPath);
72. if (!file.exists()) {
73. System.err.println(""+imgPath+" 该文件不存在！");
74. return;
75. }
76. Image src = ImageIO.read(new File(imgPath));
77. int width = src.getWidth(null);
78. int height = src.getHeight(null);
79. if (needCompress) { // 压缩LOGO
80. if (width > WIDTH) {
81. width = WIDTH;
82. }
83. if (height > HEIGHT) {
84. height = HEIGHT;
85. }
86. Image image = src.getScaledInstance(width, height,
87. Image.SCALE_SMOOTH);
88. BufferedImage tag = new BufferedImage(width, height,
89. BufferedImage.TYPE_INT_RGB);
90. Graphics g = tag.getGraphics();
91. g.drawImage(image, 0, 0, null); // 绘制缩小后的图
92. g.dispose();
93. src = image;
94. }
95. // 插入LOGO
96. Graphics2D graph = source.createGraphics();
97. int x = (QRCODE_SIZE - width) / 2;
98. int y = (QRCODE_SIZE - height) / 2;
99. graph.drawImage(src, x, y, width, height, null);
100. Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
101. graph.setStroke(new BasicStroke(3f));
102. graph.draw(shape);
103. graph.dispose();
104. }
106. public static void encode(String content, String imgPath, String destPath,
107. boolean needCompress) throws Exception {
108. BufferedImage image = QRCodeUtil.createImage(content, imgPath,
109. needCompress);
110. mkdirs(destPath);
111. // String file = new Random().nextInt(99999999)+".jpg";
112. String file = new SimpleDateFormat("yyyy_MM_dd").format(new Date()).toString()+"_"+new Random().nextInt(99999999)+".jpg";
113. ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
114. }
116. public static void mkdirs(String destPath) {
117. File file =new File(destPath);
118. //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)
119. if (!file.exists() && !file.isDirectory()) {
120. file.mkdirs();
121. }
122. }
123. //二维码带图片的logo
124. public static void encode(String content, String imgPath, String destPath)
125. throws Exception {
126. QRCodeUtil.encode(content, imgPath, destPath, false);
127. }
128. //二维码不带图片的logo
129. public static void encode(String content, String destPath,
130. boolean needCompress) throws Exception {
131. QRCodeUtil.encode(content, null, destPath, needCompress);
132. }
134. public static void encode(String content, String destPath) throws Exception {
135. QRCodeUtil.encode(content, null, destPath, false);
136. }
138. public static void encode(String content, String imgPath,
139. OutputStream output, boolean needCompress) throws Exception {
140. BufferedImage image = QRCodeUtil.createImage(content, imgPath,
141. needCompress);
142. ImageIO.write(image, FORMAT_NAME, output);
143. }
145. public static void encode(String content, OutputStream output)
146. throws Exception {
147. QRCodeUtil.encode(content, null, output, false);
148. }
150. public static String decode(File file) throws Exception {
151. BufferedImage image;
152. image = ImageIO.read(file);
153. if (image == null) {
154. return null;
155. }
156. BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(
157. image);
158. BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
159. Result result;
160. Hashtable hints = new Hashtable();
161. hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
162. result = new MultiFormatReader().decode(bitmap, hints);
163. String resultStr = result.getText();
164. return resultStr;
165. }
167. public static String decode(String path) throws Exception {
168. return QRCodeUtil.decode(new File(path));
169. }
171. public static void main(String[] args) throws Exception {
172. String text = "http://obctop.tcl.com.cn/topsale/m/examination/exam_secondary.jsp";
173. // FileUpLoadUtil ful = new FileUpLoadUtil();
174. // String targetDirectory="/var/www/topsale/topsale/train/cover/";
175. //上传图片的路径
176. // ful.beginUpload(targetDirectory);
177. //创建二维码logo
178. //QRCodeUtil.encode(text, "D:/AAAAA/AAAAA/Training---PH/July/Template-Training Summary-English June/幻灯片1.jpg", "D:/AAAAA/AAAAA/Training---PH/July/Template-Training Summary-English June", true);
179. // QRCodeUtil.encode(text, "", "D:/AAAAA/AAAAA/Training---PH/July/Template-Training Summary-English June", true);
180. QRCodeUtil.encode(text, "","D:/DW/cover", true);
181. }
182. }

 

需要用到的jar。包