如何生成二维码过程详解
1 下载zxing2.1
2 本代码配置环境:eclipse、java1.6、windows8、zxing2.1
3 解压后将文件夹里面core/src下面的com文件夹导入到eclipse工程(工程可以自己建,如QrCode)中,图示如下:
注意:在源码中需要修改其编码配置为UTF-8,否则后面解码后面的文件中中文会乱码,修改图示如下:
4 TestEnDeCode.java源代码
1 package test; 2 import java.awt.image.BufferedImage; 3 import java.io.File; 4 import java.io.IOException; 5 import java.util.Hashtable; 6 import java.util.Scanner; 7 import javax.imageio.ImageIO; 8 import com.google.zxing.BarcodeFormat; 9 import com.google.zxing.BinaryBitmap; 10 import com.google.zxing.DecodeHintType; 11 import com.google.zxing.LuminanceSource; 12 import com.google.zxing.MultiFormatReader; 13 import com.google.zxing.MultiFormatWriter; 14 import com.google.zxing.Reader; 15 import com.google.zxing.ReaderException; 16 import com.google.zxing.Result; 17 import com.google.zxing.client.j2se.BufferedImageLuminanceSource; 18 import com.google.zxing.client.j2se.MatrixToImageWriter; 19 import com.google.zxing.common.BitMatrix; 20 import com.google.zxing.common.HybridBinarizer; 21 22 public class TestEnDeCode { 23 24 /** 25 * 26 */ 27 public TestEnDeCode() { 28 // TODO Auto-generated constructor stub 29 } 30 31 /** 32 * @param args 33 */ 34 public static void main(String[] args) { 35 TestEnDeCode t=new TestEnDeCode(); 36 Scanner in = new Scanner(System.in); 37 System.out.println("编码内容:"); 38 String str = in.next(); 39 // String str = "http://www.baidu.com"; 40 String path = "D:/Qr_pics/test7.png"; 41 t.encode(str, path); 42 t.decode(path); 43 } 44 45 /* 46 * 编码: 47 * 1 将内容转换成二维矩阵 48 * 2 将该二维矩阵转换成图片 49 * */ 50 public void encode(String str, String path) { 51 try { 52 // String str = "http://www.baidu.com百度看看";// 二维码内容 53 // String path = "D:/Qr_pics/test7.png"; //二维码图片生成 路径及名称 54 BitMatrix byteMatrix; 55 byteMatrix = new MultiFormatWriter().encode(new String(str.getBytes("UTF-8"),"UTF-8"), BarcodeFormat.QR_CODE, 800, 800); //将文字转换成二维矩阵,并设置矩阵大小,这里的矩阵大小就是后面生成的图片像素大小 56 File file = new File(path);//新建矩阵文件 57 MatrixToImageWriter.writeToFile(byteMatrix, "gif", file);//将矩阵文件转换成图片文件 58 } catch (Exception e) { 59 e.printStackTrace(); 60 } 61 } 62 63 /* 64 * 解码: 65 * 1 将图片反解码为二维矩阵 66 * 2 将该二维矩阵解码为内容 67 * */ 68 public void decode(String imgPath) { 69 try { 70 Reader reader = new MultiFormatReader(); 71 // String imgPath = "D:/Qr_pics/test7.png";//获取即将被解码图片的路径 72 File file = new File(imgPath);//获取该图片文件 73 BufferedImage image; 74 try { 75 image = ImageIO.read(file); 76 if (image == null) { 77 System.out.println("Could not decode image"); 78 } 79 LuminanceSource source = new BufferedImageLuminanceSource(image); 80 BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); 81 Result result; 82 Hashtable hints = new Hashtable();//将图片反解码为二维矩阵 83 hints.put(DecodeHintType.CHARACTER_SET, "UTF-8"); 84 result = new MultiFormatReader().decode(bitmap, hints);//将该二维矩阵解码成内容 85 String resultStr = result.getText(); 86 System.out.println("\n解码结果:\n"+resultStr); 87 88 } catch (IOException ioe) { 89 System.out.println(ioe.toString()); 90 } catch (ReaderException re) { 91 System.out.println(re.toString()); 92 } 93 94 } catch (Exception ex) { 95 System.out.println(ex.toString()); 96 } 97 } 98 99 }
5 运行结果:
6 生成的二维码如下图所示:
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时间: 2024-10-10 23:48:51