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 程式師世界 >> 編程語言 >> JAVA編程 >> 關於JAVA >> java ZXing生成二維碼及條碼

java ZXing生成二維碼及條碼

編輯:關於JAVA

java ZXing生成二維碼及條碼。本站提示廣大學習愛好者:(java ZXing生成二維碼及條碼)文章只能為提供參考,不一定能成為您想要的結果。以下是java ZXing生成二維碼及條碼正文


1、jar包:  ZXing-core-3.3.0.jar    http://mvnrepository.com/artifact/com.google.zxing/core

       ZXing-javase-3.3.0.jar   http://mvnrepository.com/artifact/com.google.zxing/javase

 

BufferedImageLuminanceSource.java

 1 package com.webos.util;
 2 import java.awt.Graphics2D;
 3 import java.awt.geom.AffineTransform;
 4 import java.awt.image.BufferedImage;
 5 
 6 import com.google.zxing.LuminanceSource;
 7 
 8 public class BufferedImageLuminanceSource extends LuminanceSource {
 9     private final BufferedImage image;
10     private final int left;
11     private final int top;
12 
13     public BufferedImageLuminanceSource(BufferedImage image) {
14         this(image, 0, 0, image.getWidth(), image.getHeight());
15     }
16 
17     public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
18         super(width, height);
19 
20         int sourceWidth = image.getWidth();
21         int sourceHeight = image.getHeight();
22         if (left + width > sourceWidth || top + height > sourceHeight) {
23             throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
24         }
25 
26         for (int y = top; y < top + height; y++) {
27             for (int x = left; x < left + width; x++) {
28                 if ((image.getRGB(x, y) & 0xFF000000) == 0) {
29                     image.setRGB(x, y, 0xFFFFFFFF); // = white
30                 }
31             }
32         }
33 
34         this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
35         this.image.getGraphics().drawImage(image, 0, 0, null);
36         this.left = left;
37         this.top = top;
38     }
39 
40     public byte[] getRow(int y, byte[] row) {
41         if (y < 0 || y >= getHeight()) {
42             throw new IllegalArgumentException("Requested row is outside the image: " + y);
43         }
44         int width = getWidth();
45         if (row == null || row.length < width) {
46             row = new byte[width];
47         }
48         image.getRaster().getDataElements(left, top + y, width, 1, row);
49         return row;
50     }
51 
52     public byte[] getMatrix() {
53         int width = getWidth();
54         int height = getHeight();
55         int area = width * height;
56         byte[] matrix = new byte[area];
57         image.getRaster().getDataElements(left, top, width, height, matrix);
58         return matrix;
59     }
60 
61     public boolean isCropSupported() {
62         return true;
63     }
64 
65     public LuminanceSource crop(int left, int top, int width, int height) {
66         return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
67     }
68 
69     public boolean isRotateSupported() {
70         return true;
71     }
72 
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, 0.0, 0.0, sourceWidth);
77         BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
78         Graphics2D g = rotatedImage.createGraphics();
79         g.drawImage(image, transform, null);
80         g.dispose();
81         int width = getWidth();
82         return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
83     }
84 }

 

QRCodeUtil.java

  1 package com.webos.util;
  2 
  3 import java.awt.BasicStroke;
  4 import java.awt.Graphics;
  5 import java.awt.Graphics2D;
  6 import java.awt.Image;
  7 import java.awt.Shape;
  8 import java.awt.geom.RoundRectangle2D;
  9 import java.awt.image.BufferedImage;
 10 import java.io.File;
 11 import java.io.OutputStream;
 12 import java.util.Hashtable;
 13 import java.util.Random;
 14 
 15 import javax.imageio.ImageIO;
 16 
 17 import com.google.zxing.BarcodeFormat;
 18 import com.google.zxing.BinaryBitmap;
 19 import com.google.zxing.DecodeHintType;
 20 import com.google.zxing.EncodeHintType;
 21 import com.google.zxing.MultiFormatReader;
 22 import com.google.zxing.MultiFormatWriter;
 23 import com.google.zxing.common.BitMatrix;
 24 import com.google.zxing.common.HybridBinarizer;
 25 import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
 26 
 27 /**
 28 * @ClassName: QRCodeUtil 
 29 * @Description:    二維碼編碼
 30 * @author Liuy
 31 * @date 2016年7月9日 下午3:03:24 
 32 *  
 33 */
 34 public class QRCodeUtil {
 35     // 設置二維碼編碼格式
 36     private static final String CHARSET = "utf-8";
 37     // 保管的二維碼格式
 38     private static final String FORMAT_NAME = "JPG";
 39     // 二維碼尺寸
 40     private static final int QRCODE_SIZE = 800;
 41     // LOGO寬度
 42     private static final int LOGO_WIDTH = 80;
 43     // LOGO高度
 44     private static final int LOGO_HEIGHT = 80;
 45 
 46     /**
 47      * @Title: createImage
 48      * @Description: 將二維碼內容創立到Image流
 49      * @param content 二維碼內容
 50      * @param imgPath logo圖片地址
 51      * @param needCompress 能否緊縮logo圖片大小
 52      * @return
 53      * @throws Exception 參數闡明
 54      * @return BufferedImage 前往類型
 55      * @throws
 56      */
 57     private static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {
 58         Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
 59         hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
 60         hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
 61         hints.put(EncodeHintType.MARGIN, 1);
 62         BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
 63         int width = bitMatrix.getWidth();
 64         int height = bitMatrix.getHeight();
 65         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 66         for (int x = 0; x < width; x++) {
 67             for (int y = 0; y < height; y++) {
 68                 image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
 69             }
 70         }
 71         if (logoPath == null || "".equals(logoPath)) {
 72             return image;
 73         }
 74         // 拔出logo
 75         QRCodeUtil.insertImage(image, logoPath, needCompress);
 76         return image;
 77     }
 78 
 79     /**
 80      * @Title: insertImage
 81      * @Description: 將logo拔出到二維碼中
 82      * @param source 二維碼Image流
 83      * @param imgPath logo地址
 84      * @param needCompress 能否緊縮大小
 85      * @throws Exception 參數闡明
 86      * @return void 前往類型
 87      * @throws
 88      */
 89     private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception {
 90         File file = new File(logoPath);
 91         if (!file.exists()) {
 92             System.err.println("" + logoPath + "   該文件不存在!");
 93             return;
 94         }
 95         Image src = ImageIO.read(new File(logoPath));
 96         int width = src.getWidth(null);
 97         int height = src.getHeight(null);
 98         if (needCompress) { // 緊縮LOGO
 99             if (width > LOGO_WIDTH) {
100                 width = LOGO_WIDTH;
101             }
102             if (height > LOGO_HEIGHT) {
103                 height = LOGO_HEIGHT;
104             }
105             Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
106             BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
107             Graphics g = tag.getGraphics();
108             g.drawImage(image, 0, 0, null); // 繪制減少後的圖
109             g.dispose();
110             src = image;
111         }
112         // 拔出LOGO
113         Graphics2D graph = source.createGraphics();
114         int x = (QRCODE_SIZE - width) / 2;
115         int y = (QRCODE_SIZE - height) / 2;
116         graph.drawImage(src, x, y, width, height, null);
117         Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
118         graph.setStroke(new BasicStroke(3f));
119         graph.draw(shape);
120         graph.dispose();
121     }
122 
123     /**
124      * @Title: mkdirs
125      * @Description: 創立文件夾
126      * @param destPath 文件夾地址
127      * @return void 前往類型
128      * @throws
129      */
130     private static boolean mkdirs(String destPath) {
131         File file = new File(destPath);
132         // 當文件夾不存在時,mkdirs會自動創立多層目錄,區別於mkdir.(mkdir假如父目錄不存在則會拋出異常)
133         if (!file.exists() && !file.isDirectory()) {
134             file.mkdirs();
135             return true;
136         }
137 
138         return false;
139     }
140 
141     /**
142      * @Title: encode
143      * @Description: 生成二維碼
144      * @param content 二維碼內容
145      * @param imgPath logo圖片地址
146      * @param destPath 目的保管地址
147      * @param needCompress 能否緊縮logo圖片大小
148      * @throws Exception 參數闡明
149      * @return void 前往類型
150      * @throws
151      */
152     private static void encode(String content, String logoPath, String destPath, boolean needCompress) throws Exception {
153         BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
154         if (mkdirs(destPath)) {
155             String file = new Random().nextInt(99999999) + ".jpg";
156             ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
157         }
158     }
159 
160     /**
161      * @Title: encode
162      * @Description: 生成二維碼
163      * @param content 二維碼內容
164      * @param destPath 目的保管地址
165      * @throws Exception 參數闡明
166      * @return void 前往類型
167      * @throws
168      */
169     public static void encode(String content, String destPath) throws Exception {
170         QRCodeUtil.encode(content, null, destPath, false);
171     }
172 
173     /**
174      * @Title: encode
175      * @Description: 生成二維碼
176      * @param content 二維碼內容
177      * @param imgPath logo圖片地址
178      * @param output 輸入流
179      * @param needCompress 能否緊縮logo圖片大小
180      * @throws Exception 參數闡明
181      * @return void 前往類型
182      * @throws
183      */
184     public static void encode(String content, String logoPath, OutputStream output, boolean needCompress) throws Exception {
185         BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
186         ImageIO.write(image, FORMAT_NAME, output);
187     }
188 
189     /**
190      * @Title: encode
191      * @Description: 生成二維碼
192      * @param content 二維碼內容
193      * @param output 輸入流
194      * @throws Exception 參數闡明
195      * @return void 前往類型
196      * @throws
197      */
198     public static void encode(String content, OutputStream output) throws Exception {
199         QRCodeUtil.encode(content, null, output, false);
200     }
201 
202     /**
203      * @Title: decode
204      * @Description: 對二維碼解碼
205      * @param file 文件對象
206      * @return 解碼後的二維碼內容字符串
207      * @throws Exception 參數闡明
208      * @return String 前往類型
209      * @throws
210      */
211     private static String decode(File file) throws Exception {
212         BufferedImage image;
213         image = ImageIO.read(file);
214         if (image == null) {
215             return null;
216         }
217         BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
218         BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
219         Hashtable<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();
220         hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
221         return new MultiFormatReader().decode(bitmap, hints).getText();
222     }
223 
224     /**
225      * @Title: decode
226      * @Description: 對二維碼解碼
227      * @param path 文件途徑
228      * @return
229      * @throws Exception 參數闡明
230      * @return String 前往類型
231      * @throws
232      */
233     public static String decode(String path) throws Exception {
234         return QRCodeUtil.decode(new File(path));
235     }
236 }

 

 

QRCodeServlet.java

 1 package com.webos.servlet;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.ServletException;
 6 import javax.servlet.annotation.WebServlet;
 7 import javax.servlet.http.HttpServlet;
 8 import javax.servlet.http.HttpServletRequest;
 9 import javax.servlet.http.HttpServletResponse;
10 
11 import com.webos.util.QRCodeUtil;
12 
13 
14 /*
15  * Servlet implementation class QRCodeServlet
16  */
17 @WebServlet("/QRCodeServlet")
18 public class QRCodeServlet extends HttpServlet {
19     private static final long serialVersionUID = 1L;
20 
21     /*
22      * @see HttpServlet#HttpServlet()
23      */
24     public QRCodeServlet() {
25         super();
26     }
27 
28     /*
29      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
30      * response)
31      */
32     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
33         try {
34             String text = "http://www.baidu.com?timestamp=" + System.currentTimeMillis();
35             QRCodeUtil.encode(text, response.getOutputStream());
36         } catch (Exception e) {
37             e.printStackTrace();
38         }
39     }
40 
41     /*
42      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
43      * response)
44      */
45     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
46         // TODO Auto-generated method stub
47         doGet(request, response);
48     }
49 
50 }

 

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