java生成二维码使用QRCode和ZXing两种方式

QRCode开发需要包 http://download.csdn.net/detail/xiaokui_wingfly/7957815

ZXing开发需要包 http://download.csdn.net/detail/u010457960/5301392

QRCode方式

package cn.utils;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.io.UnsupportedEncodingException;

import javax.imageio.ImageIO;

import jp.sourceforge.qrcode.QRCodeDecoder;

import jp.sourceforge.qrcode.data.QRCodeImage;

import jp.sourceforge.qrcode.exception.DecodingFailedException;

import com.swetake.util.Qrcode;

public class QRCodeUtils {

/**

* 编码字符串内容到目标File对象中

*

* @param encodeddata 编码的内容

* @param destFile 生成file文件 1381090722 5029067275903

* @throws IOException

*/

public static void qrCodeEncode(String encodeddata, File destFile) throws IOException {

Qrcode qrcode = new Qrcode();

qrcode.setQrcodeErrorCorrect(‘M’); // 纠错级别（L 7%、M 15%、Q 25%、H 30%）和版本有关

qrcode.setQrcodeEncodeMode(‘B’);

qrcode.setQrcodeVersion(7); // 设置Qrcode包的版本

byte[] d = encodeddata.getBytes("GBK"); // 字符集
BufferedImage bi = new BufferedImage(139, 139, BufferedImage.TYPE_INT_RGB);
// createGraphics   // 创建图层
Graphics2D g = bi.createGraphics();

g.setBackground(Color.WHITE);   // 设置背景颜色（白色）
g.clearRect(0, 0, 139, 139);    // 矩形 X、Y、width、height
g.setColor(Color.BLACK);    // 设置图像颜色（黑色）

if (d.length > 0 && d.length < 123) {
boolean[][] b = qrcode.calQrcode(d);
for (int i = 0; i < b.length; i++) {
for (int j = 0; j < b.length; j++) {
if (b[j][i]) {
g.fillRect(j * 3 + 2, i * 3 + 2, 3, 3);
}
}
}
}

// Image img = ImageIO.read(new File(“D:/tt.png”)); logo

// g.drawImage(img, 25, 55,60,50, null);

g.dispose(); // 释放此图形的上下文以及它使用的所有系统资源。调用 dispose 之后，就不能再使用 Graphics 对象
bi.flush(); // 刷新此 Image 对象正在使用的所有可重构的资源

ImageIO.write(bi, "png", destFile);
System.out.println("Input Encoded data is：" + encodeddata);
}

/**
* 解析二维码，返回解析内容
*
* @param imageFile
* @return
*/
public static String qrCodeDecode(File imageFile) {
String decodedData = null;
QRCodeDecoder decoder = new QRCodeDecoder();
BufferedImage image = null;
try {
image = ImageIO.read(imageFile);
} catch (IOException e) {
System.out.println("Error: " + e.getMessage());
}

try {
decodedData = new String(decoder.decode(new J2SEImage(image)), "GBK");
System.out.println("Output Decoded Data is：" + decodedData);
} catch (DecodingFailedException dfe) {
System.out.println("Error: " + dfe.getMessage());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return decodedData;
}

public static void main(String[] args) {
String FilePath = "d:/qrcode.png";
File qrFile = new File(FilePath);

// 二维码内容
String encodeddata = "Hello X-rapido";
try {
QRCodeUtils.qrCodeEncode(encodeddata, qrFile);
} catch (IOException e) {
e.printStackTrace();
}

// 解码
String reText = QRCodeUtils.qrCodeDecode(qrFile);
System.out.println(reText);
}

106.}

108.class J2SEImage implements QRCodeImage {

BufferedImage image;

public J2SEImage(BufferedImage image) {
this.image = image;
}

public int getWidth() {
return image.getWidth();
}

public int getHeight() {
return image.getHeight();
}

public int getPixel(int x, int y) {
return image.getRGB(x, y);
}

}

Zxing方式

package cn.utils.code;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.io.OutputStream;

import javax.imageio.ImageIO;

import com.google.zxing.common.BitMatrix;

/**

* 二维码的生成需要借助MatrixToImageWriter类，该类是由Google提供的，可以将该类直接拷贝到源码中使用

*/

public class MatrixToImageWriter {

private static final int BLACK = 0xFF000000;

private static final int WHITE = 0xFFFFFFFF;

private MatrixToImageWriter() {
}

public static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
}
}
return image;
}

public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, file)) {
throw new IOException("Could not write an image of format " + format + " to " + file);
}
}

public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
}

}

编写main方法

[java] view plaincopyprint?

package cn.utils.code;

import java.io.File;

import java.util.Hashtable;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.common.BitMatrix;

public class Main {

public static void main(String[] args) throws Exception {

String text = “NiuYueYue I Love You！”; // 二维码内容

int width = 300; // 二维码图片宽度

int height = 300; // 二维码图片高度

String format = “gif”;// 二维码的图片格式

Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");   // 内容所使用字符集编码

BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints);
// 生成二维码
File outputFile = new File("d:" + File.separator + "new.gif");
MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
}

}

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