windows8运行zxing源码 生成与解码二维码 详解（含注释与图解可直接运行）

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package test;

    import java.awt.image.BufferedImage;  

    import java.io.File;  

    import java.io.IOException;  

    import java.util.Hashtable;  

    import java.util.Scanner;

    import javax.imageio.ImageIO;  

    import com.google.zxing.BarcodeFormat;  

    import com.google.zxing.BinaryBitmap;  

    import com.google.zxing.DecodeHintType;  

    import com.google.zxing.LuminanceSource;  

    import com.google.zxing.MultiFormatReader;  

    import com.google.zxing.MultiFormatWriter;  

    import com.google.zxing.Reader;  

    import com.google.zxing.ReaderException;  

    import com.google.zxing.Result;  

    import com.google.zxing.client.j2se.BufferedImageLuminanceSource;  

    import com.google.zxing.client.j2se.MatrixToImageWriter;  

    import com.google.zxing.common.BitMatrix;  

    import com.google.zxing.common.HybridBinarizer;  

    public class TestEnDeCode {  

        /** 

         *  

         */

        public TestEnDeCode() {  

            // TODO Auto-generated constructor stub           }  

        /** 

         * @param args 

         */

        public static void main(String[] args) {  

            TestEnDeCode t=new TestEnDeCode();  

            Scanner in = new Scanner(System.in);

            System.out.println("编码内容：");

            String str = in.next(); //            String str = "http://www.baidu.com";             String path = "D:/Qr_pics/test7.png";

            t.encode(str, path);  

            t.decode(path);  

        }  

        /*

         * 编码：

         * 1 将内容转换成二维矩阵

         * 2 将该二维矩阵转换成图片

         * */

        public void encode(String str, String path) {  

            try {   //                String str = "http://www.baidu.com百度看看";// 二维码内容  

//                String path = "D:/Qr_pics/test7.png"; //二维码图片生成 路径及名称                 BitMatrix byteMatrix;  

                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                  File file = new File(path);//新建矩阵文件                   MatrixToImageWriter.writeToFile(byteMatrix, "gif", file);//将矩阵文件转换成图片文件               } catch (Exception e) {  

                e.printStackTrace();  

            }  

        }  

        /*

         * 解码：

         * 1 将图片反解码为二维矩阵

         * 2 将该二维矩阵解码为内容

         * */

        public void decode(String imgPath) {  

            try {  

                Reader reader = new MultiFormatReader();   //                String imgPath = "D:/Qr_pics/test7.png";//获取即将被解码图片的路径                   File file = new File(imgPath);//获取该图片文件                   BufferedImage image;  

                try {  

                    image = ImageIO.read(file);  

                    if (image == null) {  

                        System.out.println("Could not decode image");  

                    }  

                    LuminanceSource source = new BufferedImageLuminanceSource(image);  

                    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));  

                    Result result;  

                    Hashtable hints = new Hashtable();//将图片反解码为二维矩阵                       hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");  

                    result = new MultiFormatReader().decode(bitmap, hints);//将该二维矩阵解码成内容                       String resultStr = result.getText();  

                    System.out.println("\n解码结果：\n"+resultStr);  

                } catch (IOException ioe) {  

                    System.out.println(ioe.toString());  

                } catch (ReaderException re) {  

                    System.out.println(re.toString());  

                }  

            } catch (Exception ex) {  

                System.out.println(ex.toString());

            }  

        }  

    }