二维码的生成方式(java)

  介绍三种二维码的生成方式：

  第一种:使用google的zxing生成

package com.zxing;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
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 TestZXing {

	public static void main(String[] args) throws Exception {
		// testEncode();
		testDecode();
	}

	/**
	 * 生成二维码
	 * 
	 * @throws WriterException
	 * @throws IOException
	 */
	public static void testEncode() throws WriterException, IOException {
		String filePath = "D://";
		String fileName = "zxing.png";
		String content = "测试zxing生成二维码";
		int width = 300; // 图像宽度
		int height = 300; // 图像高度
		String format = "png";// 图像类型
		Map hints = new HashMap();
		hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
		BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
				BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵
		Path path = FileSystems.getDefault().getPath(filePath, fileName);
		MatrixToImageWriter.writeToPath(bitMatrix, format, path);// 输出图像
		System.out.println("输出成功.");
	}

	/**
	 * 解析二维码
	 */
	public static void testDecode() {
		String filePath = "D://zxing.png";
		BufferedImage image;
		try {
			image = ImageIO.read(new File(filePath));
			LuminanceSource source = new BufferedImageLuminanceSource(image);
			Binarizer binarizer = new HybridBinarizer(source);
			BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
			Map hints = new HashMap();
			hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
			Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码
			System.out.println("图片中内容：  ");
			System.out.println("author： " + result.getText());
			System.out.println("图片中格式：  ");
			System.out.println("encode： " + result.getBarcodeFormat());
		} catch (IOException e) {
			e.printStackTrace();
		} catch (NotFoundException e) {
			e.printStackTrace();
		}
	}

}

第二种方式:使用qrCode方式

package com.qrCode;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import com.swetake.util.Qrcode;
import jp.sourceforge.qrcode.QRCodeDecoder;
import jp.sourceforge.qrcode.exception.DecodingFailedException;

public class QRCode {

	/**
	 * 解析二维码(QRCode)
	 * 
	 * @param imgPath
	 * @return
	 */
	public static String decoderQRCode(String imgPath) {
		// QRCode 二维码图片的文件
		File imageFile = new File(imgPath);
		BufferedImage bufImg = null;
		String content = null;
		try {
			bufImg = ImageIO.read(imageFile);
			QRCodeDecoder decoder = new QRCodeDecoder();
			content = new String(decoder.decode(new QRCodeImageBean(bufImg)), "utf-8");
		} catch (IOException e) {
			System.out.println("Error: " + e.getMessage());
			e.printStackTrace();
		} catch (DecodingFailedException dfe) {
			System.out.println("Error: " + dfe.getMessage());
			dfe.printStackTrace();
		}
		return content;
	}

	/**
	 * 生成二维码(QRCode)图片
	 * 
	 * @param content  存储内容
	 * @param imgPath 图片路径
	 * @param imgType  图片类型
	 */
	public static void encoderQRCode(String content, String imgPath, String imgType) {
		encoderQRCode(content, imgPath, imgType, 7);
	}

	/**
	 * 生成二维码(QRCode)图片
	 * 
	 * @param content   存储内容
	 * @param imgPath  图片路径
	 * @param imgType 图片类型
	 * @param size 二维码尺寸
	 */
	public static void encoderQRCode(String content, String imgPath, String imgType, int size) {
		try {
			BufferedImage bufImg = qRCodeCommon(content, imgType, size);
			File imgFile = new File(imgPath);
			// 生成二维码QRCode图片
			ImageIO.write(bufImg, imgType, imgFile);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 生成二维码(QRCode)图片的公共方法
	 * 
	 * @param content  存储内容
	 * @param imgType 图片类型
	 * @param size 二维码尺寸（1-40）
	 * @return
	 */
	private static BufferedImage qRCodeCommon(String content, String imgType, int size) {
		BufferedImage bufImg = null;
		try {
			Qrcode qrcodeHandler = new Qrcode();
			// 设置二维码排错率，可选L(7%)、M(15%)、Q(25%)、H(30%)，排错率越高可存储的信息越少，但对二维码清晰度的要求越小
			qrcodeHandler.setQrcodeErrorCorrect('M');
			qrcodeHandler.setQrcodeEncodeMode('B');
			// 设置设置二维码尺寸，取值范围1-40，值越大尺寸越大，可存储的信息越大
			qrcodeHandler.setQrcodeVersion(size);
			// 获得内容的字节数组，设置编码格式
			byte[] contentBytes = content.getBytes("utf-8");
			// 图片尺寸
			int imgSize = 67 + 12 * (size - 1);
			bufImg = new BufferedImage(imgSize, imgSize, BufferedImage.TYPE_INT_RGB);
			Graphics2D gs = bufImg.createGraphics();
			// 设置背景颜色
			gs.setBackground(Color.WHITE);
			gs.clearRect(0, 0, imgSize, imgSize);

			// 设定图像颜色> BLACK
			gs.setColor(Color.BLACK);
			// 设置偏移量，不设置可能导致解析出错
			int pixoff = 2;
			// 输出内容> 二维码
			if (contentBytes.length > 0 && contentBytes.length < 800) {
				boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);
				for (int i = 0; i < codeOut.length; i++) {
					for (int j = 0; j < codeOut.length; j++) {
						if (codeOut[j][i]) {
							gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);
						}
					}
				}
			} else {
				throw new Exception("QRCode content bytes length = " + contentBytes.length + " not in [0, 800].");
			}
			gs.dispose();
			bufImg.flush();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return bufImg;
	}

}

package com.qrCode;

import java.awt.image.BufferedImage;
import jp.sourceforge.qrcode.data.QRCodeImage;

public class QRCodeImageBean implements QRCodeImage {

    BufferedImage bufImg;  
    
    public QRCodeImageBean(BufferedImage bufImg) {  
        this.bufImg = bufImg;  
    }  
    public int getHeight() {  
        return bufImg.getHeight();  
    }  
    public int getPixel(int x, int y) {  
        return bufImg.getRGB(x, y);  
    }  
    public int getWidth() {  
        return bufImg.getWidth();  
    }  
}

package com.qrCode;

public class TestQRCode {

	public static void main(String[] args) {
		 
		//生成二维码
		 String imgPath = "d:/qrCode.png";
		 String encoderContent = "http://www.qrCode.com";
		 QRCode.encoderQRCode(encoderContent, imgPath, "png");
		 System.out.println("encoder success!!!");
		 
		 //解析二维码
		 String imgPath2 = "d:/qrCode.png";
		 String qrCon = QRCode.decoderQRCode(imgPath2);
		 System.out.println("decoder success!!!");
		 System.out.println("二维码内容为:" + qrCon);
	}
}

第三种方式：这也是最简单的方式使用jQuery的qrCode插件

资源可以在这里下载： http://download.csdn.net/detail/qq_21916331/9594641