用QRCode生成带有中间logo图的二维码

              1、qrcode.jar下载的地址是：http://download.csdn.net/download/ilovejavas/6767365            

              2、下面是代码实现：

                    2.1、用来设置二维码一些基本参数的pojo类如下：

package kingpoint.qrcode.entity;

import java.io.Serializable;

public class Entity_Qrcode implements Serializable{

private static final long serialVersionUID = 1L;

/**
* 内容
*/
private String content;
/**
* 二维码图片地址
*/
private String qrcodePath;
/**
* logo图片地址
*/
private String logoPath;
/**
* 二维码图片的宽度
*/
private int width;
/**
* 二维码图片的高度
*/
private int height;
/**
* 是否添加logo图片
*/
private boolean isFlag;
/**
* 生成图片的格式
*/
private String format;
/**
* 纠错级别
*/
private char qrcodeErrorCorrect;
/**
* 编码模式
*/
private char qrcodeEncodeModel;
/**
* 设置二维码版本
*/
private int version;

/** getter and setter */

public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getQrcodePath() {
return qrcodePath;
}
public void setQrcodePath(String qrcodePath) {
this.qrcodePath = qrcodePath;
}
public String getLogoPath() {
return logoPath;
}
public void setLogoPath(String logoPath) {
this.logoPath = logoPath;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
public boolean isFlag() {
return isFlag;
}
public void setFlag(boolean isFlag) {
this.isFlag = isFlag;
}
public String getFormat() {
return format;
}
public void setFormat(String format) {
this.format = format;
}
public char getQrcodeErrorCorrect() {
return qrcodeErrorCorrect;
}
public void setQrcodeErrorCorrect(char qrcodeErrorCorrect) {
this.qrcodeErrorCorrect = qrcodeErrorCorrect;
}
public char getQrcodeEncodeModel() {
return qrcodeEncodeModel;
}
public void setQrcodeEncodeModel(char qrcodeEncodeModel) {
this.qrcodeEncodeModel = qrcodeEncodeModel;
}
public int getVersion() {
return version;
}
public void setVersion(int version) {
this.version = version;
}

}

                2.2、解析二维码时要用到的一个pojo类：

package kingpoint.qrcode.test;

import java.awt.image.BufferedImage;

import jp.sourceforge.qrcode.data.QRCodeImage;

public class CodeImage implements QRCodeImage {

private BufferedImage bufferedImage;

public CodeImage(BufferedImage image){
this.bufferedImage = image;
}

@Override
public int getHeight() {
return bufferedImage.getHeight();
}

@Override
public int getPixel(int x, int y) {
return bufferedImage.getRGB(x, y);
}

@Override
public int getWidth() {
return bufferedImage.getHeight();
}

}

                  2.3、具体代码实现如下：

package kingpoint.qrcode.test;
/**
* 下载地址：http://swetake.com/qrcode/java/qr_java.html
* 总结：用QrCode无法解析Zxing生成的二维码,反过来则可以
*/
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.text.SimpleDateFormat;
import java.util.Date;

import javax.imageio.ImageIO;

import jp.sourceforge.qrcode.QRCodeDecoder;
import jp.sourceforge.qrcode.exception.DecodingFailedException;
import kingpoint.qrcode.entity.Entity_Qrcode;

import com.swetake.util.Qrcode;

public class QrCode {
/**
* 生成二维码(QRCode)图片
* @param qrcode
*/
public static void createQRCode(Entity_Qrcode qrcode) {
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(qrcode.getQrcodeErrorCorrect());
/* N代表数字,A代表字符a-Z,B代表其他字符 */
qrcodeHandler.setQrcodeEncodeMode(qrcode.getQrcodeEncodeModel());
/* 设置设置二维码版本，取值范围1-40，值越大尺寸越大，可存储的信息越大 */
qrcodeHandler.setQrcodeVersion(qrcode.getVersion());

byte[] contentBytes = qrcode.getContent().getBytes("UTF-8");
/*二维码的宽与高*/
int width = qrcode.getWidth();
int height = qrcode.getHeight();
BufferedImage bufImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D gs = bufImg.createGraphics();

gs.setBackground(Color.WHITE);
gs.clearRect(0, 0, width, height);

/* 设置图像颜色 */
gs.setColor(Color.BLACK);

/* 设置偏移量 不设置可能导致解析出错 */
int pixoff = 3;
/* 输出内容 > 二维码 */
if (contentBytes.length > 0 && contentBytes.length <width) {
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 {
System.err.println("QRCode content bytes length = "
+ contentBytes.length + " not in [ 0,200]. ");
}
/* 判断是否需要添加logo图片 */
if(qrcode.isFlag()){
int width_4 = width / 4;
int width_8 = width_4 / 2;
int height_4 = height / 4;
int height_8 = height_4 / 2;
Image img = ImageIO.read(new File(qrcode.getLogoPath()));
gs.drawImage(img, width_4 + width_8, height_4 + height_8,width_4,height_4, null);
gs.dispose();
bufImg.flush();
}

/* 生成二维码QRCode图片 */
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String fileName = sdf.format(new Date()) + "." + qrcode.getFormat();
String url = qrcode.getQrcodePath() + fileName;
File imgFile = new File(url);
if(!imgFile.exists()){
imgFile.mkdirs();
}
ImageIO.write(bufImg, qrcode.getFormat(), imgFile);
System.out.println("生成二维码图片成功!");
} catch (Exception e){
e.printStackTrace();
}
}
/**
* 解析二维码
*/
public static String decode(String imagePath){
// QRCode 二维码图片的文件
File imageFile = new File(imagePath);
BufferedImage bufImg = null;
String content = null;
try {
bufImg = ImageIO.read(imageFile);
QRCodeDecoder decoder = new QRCodeDecoder();
content = new String(decoder.decode(new CodeImage(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;
}
public static void main(String[] args) {
Entity_Qrcode qrcode = new Entity_Qrcode();
qrcode.setContent("http://www.baidu.com这是一个百度地址是发生的发生斯蒂芬随碟附送的斯蒂芬斯蒂芬是");
qrcode.setQrcodePath
4000
("f:/qrcode/");
qrcode.setLogoPath("f:/qrcode/3.gif");
qrcode.setFormat("png");
qrcode.setFlag(true);
qrcode.setQrcodeErrorCorrect('M');
qrcode.setWidth(300);
qrcode.setHeight(300);
qrcode.setVersion(20);
qrcode.setQrcodeEncodeModel('B');
//    	QrCode.createQRCode(qrcode);
String content = QrCode.decode("f:/qrcode/20130826174039.png");
System.out.println(content);
}
}