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

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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;
26. public class QRCodeUtil {
27. //二维码编码
28. private static final String CHARSET = "utf-8";
29. //二维码图片格式
30. private static final String FORMAT_NAME = "JPG";
31. // 二维码尺寸
32. private static final int QRCODE_SIZE = 300;
33. // LOGO宽度
34. private static final int WIDTH = 60;
35. // LOGO高度
36. private static final int HEIGHT = 60;
37. private static BufferedImage createImage(String content, String imgPath,
38. boolean needCompress) throws Exception {
39. // 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
40. Hashtable hints = new Hashtable();
41. //设置二维码容错率，从大到小依次H，Q，M,L，
42. hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
43. //设置编码类型
44. hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
45. //设置二维码编辑宽度
46. hints.put(EncodeHintType.MARGIN, 1);
47. BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
48. BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
49. int width = bitMatrix.getWidth();
50. int height = bitMatrix.getHeight();
51. // 二维矩阵转为一维像素数组,也就是一直横着排了
52. BufferedImage image = new BufferedImage(width, height,
53. BufferedImage.TYPE_INT_RGB);
54. for (int x = 0; x < width; x++) {
55. for (int y = 0; y < height; y++) {
56. image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
57. : 0xFFFFFFFF);
58. }
59. }
60. if (imgPath == null || "".equals(imgPath)) {
61. return image;
62. }
63. // 插入图片
64. QRCodeUtil.insertImage(image, imgPath, needCompress);
65. return image;
66. }
67. private static void insertImage(BufferedImage source, String imgPath,
68. boolean needCompress) throws Exception {
69. File file = new File(imgPath);
70. if (!file.exists()) {
71. System.err.println(""+imgPath+" 该文件不存在！");
72. return;
73. }
74. Image src = ImageIO.read(new File(imgPath));
75. int width = src.getWidth(null);
76. int height = src.getHeight(null);
77. if (needCompress) { // 压缩LOGO
78. if (width > WIDTH) {
79. width = WIDTH;
80. }
81. if (height > HEIGHT) {
82. height = HEIGHT;
83. }
84. Image image = src.getScaledInstance(width, height,
85. Image.SCALE_SMOOTH);
86. BufferedImage tag = new BufferedImage(width, height,
87. BufferedImage.TYPE_INT_RGB);
88. Graphics g = tag.getGraphics();
89. g.drawImage(image, 0, 0, null); // 绘制缩小后的图
90. g.dispose();
91. src = image;
92. }
93. // 插入LOGO
94. Graphics2D graph = source.createGraphics();
95. int x = (QRCODE_SIZE - width) / 2;
96. int y = (QRCODE_SIZE - height) / 2;
97. graph.drawImage(src, x, y, width, height, null);
98. Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
99. graph.setStroke(new BasicStroke(3f));
100. graph.draw(shape);
101. graph.dispose();
102. }
103. public static void encode(String content, String imgPath, String destPath,
104. boolean needCompress) throws Exception {
105. BufferedImage image = QRCodeUtil.createImage(content, imgPath,
106. needCompress);
107. mkdirs(destPath);
108. // String file = new Random().nextInt(99999999)+".jpg";
109. String file = new SimpleDateFormat("yyyy_MM_dd").format(new Date()).toString()+"_"+new Random().nextInt(99999999)+".jpg";
110. ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
111. }
112. public static void mkdirs(String destPath) {
113. File file =new File(destPath);
114. //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)
115. if (!file.exists() && !file.isDirectory()) {
116. file.mkdirs();
117. }
118. }
119. //二维码带图片的logo
120. public static void encode(String content, String imgPath, String destPath)
121. throws Exception {
122. QRCodeUtil.encode(content, imgPath, destPath, false);
123. }
124. //二维码不带图片的logo
125. public static void encode(String content, String destPath,
126. boolean needCompress) throws Exception {
127. QRCodeUtil.encode(content, null, destPath, needCompress);
128. }
129. public static void encode(String content, String destPath) throws Exception {
130. QRCodeUtil.encode(content, null, destPath, false);
131. }
132. public static void encode(String content, String imgPath,
133. OutputStream output, boolean needCompress) throws Exception {
134. BufferedImage image = QRCodeUtil.createImage(content, imgPath,
135. needCompress);
136. ImageIO.write(image, FORMAT_NAME, output);
137. }
138. public static void encode(String content, OutputStream output)
139. throws Exception {
140. QRCodeUtil.encode(content, null, output, false);
141. }
142. public static String decode(File file) throws Exception {
143. BufferedImage image;
144. image = ImageIO.read(file);
145. if (image == null) {
146. return null;
147. }
148. BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(
149. image);
150. BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
151. Result result;
152. Hashtable hints = new Hashtable();
153. hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
154. result = new MultiFormatReader().decode(bitmap, hints);
155. String resultStr = result.getText();
156. return resultStr;
157. }
158. public static String decode(String path) throws Exception {
159. return QRCodeUtil.decode(new File(path));
160. }
161. public static void main(String[] args) throws Exception {
162. String text = "http://obctop.tcl.com.cn/topsale/m/examination/exam_secondary.jsp";
163. // FileUpLoadUtil ful = new FileUpLoadUtil();
164. // String targetDirectory="/var/www/topsale/topsale/train/cover/";
165. //上传图片的路径
166. // ful.beginUpload(targetDirectory);
167. //创建二维码logo
168. //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);
169. // QRCodeUtil.encode(text, "", "D:/AAAAA/AAAAA/Training---PH/July/Template-Training Summary-English June", true);
170. QRCodeUtil.encode(text, "","D:/DW/cover", true);
171. }
172. }

需要用到的jar。包