在看到了一个生成二维码的工具，于是就产生了一个想法：
为什么自己不做一个二维码的生成和解析工具呢？花了一个多钟的时间，嘿嘿，就做出来啦...
先来看看效果图吧：
CODE_QR:
CODE_128: 
PDF_417:
二维码的意思是：
下面是操作步骤：
一：下载zxing的压缩包：
可以到这里下载：
ZXing-2.1.zip：
得到：
zxing-2.1\core\core.jar
zxing-2.1\javase\javase.jar
二：把他添加进入你的项目的里面：
/QRCodes/src/com/b510/qrcode/QRCode.java
1 /** 2 * 3 */ 4 package com.b510.qrcode; 5 6 import java.awt.image.BufferedImage; 7 import java.io.File; 8 import java.io.IOException; 9 import java.util.Hashtable; 10 import java.util.Map; 11 12 import javax.imageio.ImageIO; 13 14 import com.google.zxing.BarcodeFormat; 15 import com.google.zxing.BinaryBitmap; 16 import com.google.zxing.DecodeHintType; 17 import com.google.zxing.EncodeHintType; 18 import com.google.zxing.LuminanceSource; 19 import com.google.zxing.MultiFormatReader; 20 import com.google.zxing.MultiFormatWriter; 21 import com.google.zxing.ReaderException; 22 import com.google.zxing.Result; 23 import com.google.zxing.Writer; 24 import com.google.zxing.WriterException; 25 import com.google.zxing.client.j2se.BufferedImageLuminanceSource; 26 import com.google.zxing.common.BitMatrix; 27 import com.google.zxing.common.HybridBinarizer; 28 import com.google.zxing.oned.CodaBarWriter; 29 import com.google.zxing.oned.Code128Writer; 30 import com.google.zxing.oned.Code39Writer; 31 import com.google.zxing.oned.EAN13Writer; 32 import com.google.zxing.oned.EAN8Writer; 33 import com.google.zxing.oned.ITFWriter; 34 import com.google.zxing.oned.UPCAWriter; 35 import com.google.zxing.pdf417.encoder.PDF417Writer; 36 import com.google.zxing.qrcode.QRCodeWriter; 37 38 /** 39 * 利用zxing开源工具生成二维码QRCode 40 * 41 * @date 2012-10-26 42 * @author xhw 43 * 44 */ 45 public class QRCode { 46 private static final int BLACK = 0xff000000; 47 private static final int WHITE = 0xFFFFFFFF; 48 49 /** 50 * @param args 51 */ 52 public static void main(String[] args) { 53 QRCode test = new QRCode(); 54 File file = new File("C://test.png"); 55 /** 56 * 在com.google.zxing.MultiFormatWriter类中，定义了一些我们不知道的码,二维码只是其中的一种 57 * public BitMatrix encode(String contents, 58 BarcodeFormat format, 59 int width, int height, 60 Map hints) throws WriterException { 61 Writer writer; 62 switch (format) { 63 case EAN_8: 64 writer = new EAN8Writer(); 65 break; 66 case EAN_13: 67 writer = new EAN13Writer(); 68 break; 69 case UPC_A: 70 writer = new UPCAWriter(); 71 break; 72 case QR_CODE: //这里是二维码 73 writer = new QRCodeWriter(); 74 break; 75 case CODE_39: 76 writer = new Code39Writer(); 77 break; 78 case CODE_128: //这个可以生成 79 writer = new Code128Writer(); 80 break; 81 case ITF: 82 writer = new ITFWriter(); 83 break; 84 case PDF_417: //这个可以生成 85 writer = new PDF417Writer(); 86 break; 87 case CODABAR: 88 writer = new CodaBarWriter(); 89 break; 90 default: 91 throw new IllegalArgumentException("No encoder available for format " + format); 92 } 93 return writer.encode(contents, format, width, height, hints); 94 } 95 96 */ 97 test.encode("helloworld,I'm Hongten.welcome to my zone:http://www.cnblogs.com/hongten", file, BarcodeFormat.QR_CODE, 200, 200, null); 98 test.decode(file); 99 }100 101 /**102 * 生成QRCode二维码 103 * 在编码时需要将com.google.zxing.qrcode.encoder.Encoder.java中的 104 * static final String DEFAULT_BYTE_MODE_ENCODING = "ISO8859-1"; 105 * 修改为UTF-8，否则中文编译后解析不了 106 */107 public void encode(String contents, File file, BarcodeFormat format, int width, int height, Map hints) {108 try { //消除乱码 contents = new String(contents.getBytes("UTF-8"), "ISO-8859-1"); 109 BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, format, width, height);110 writeToFile(bitMatrix, "png", file);111 } catch (Exception e) {112 e.printStackTrace();113 }114 }115 116 /**117 * 生成二维码图片 118 * 119 * @param matrix120 * @param format121 * 图片格式122 * @param file123 * 生成二维码图片位置124 * @throws IOException125 */126 public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {127 BufferedImage image = toBufferedImage(matrix);128 ImageIO.write(image, format, file);129 }130 131 /**132 * 生成二维码内容 133 * 134 * @param matrix135 * @return136 */137 public static BufferedImage toBufferedImage(BitMatrix matrix) {138 int width = matrix.getWidth();139 int height = matrix.getHeight();140 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);141 for (int x = 0; x < width; x++) {142 for (int y = 0; y < height; y++) {143 image.setRGB(x, y, matrix.get(x, y) == true ? BLACK : WHITE);144 }145 }146 return image;147 }148 149 /**150 * 解析QRCode二维码151 */152 @SuppressWarnings("unchecked")153 public void decode(File file) {154 try {155 BufferedImage image;156 try {157 image = ImageIO.read(file);158 if (image == null) {159 System.out.println("Could not decode image");160 }161 LuminanceSource source = new BufferedImageLuminanceSource(image);162 BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));163 Result result;164 @SuppressWarnings("rawtypes")165 Hashtable hints = new Hashtable();166 //解码设置编码方式为：utf-8167 hints.put(DecodeHintType.CHARACTER_SET, "utf-8");168 result = new MultiFormatReader().decode(bitmap, hints);169 String resultStr = result.getText();170 System.out.println("解析后内容：" + resultStr);171 } catch (IOException ioe) {172 System.out.println(ioe.toString());173 } catch (ReaderException re) {174 System.out.println(re.toString());175 }176 } catch (Exception ex) {177 System.out.println(ex.toString());178 }179 }180 } 是不是很简单.....
源码下载：