zxing 生成二维码，可设置logo、二维码颜色、白边大小

主要是使用google的zxing 生成二维码，可设置logo、二维码前景色/后景色、白边大小、二维码大小

1、用到jar包

<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.1.0</version>
</dependency>

2、生成二维码参数类

/**
* @copyright @2015-2016 Abel-Studio.All Rights Reserved
*/
package com.abel.tools.qrcode;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
* @description
* @author Abel.lin
* @date 2016年7月10日 下午4:41:41
*/
public class QRCodeParams {
private String txt;                //二维码内容
private String qrCodeUrl;          //二维码网络路径
private String filePath;           //二维码生成物理路径
private String fileName;           //二维码生成图片名称（包含后缀名）
private String logoPath;           //logo图片
private Integer width = 300;           //二维码宽度
private Integer height = 300;          //二维码高度
private Integer onColor = 0xFF000000;  //前景色
private Integer offColor = 0xFFFFFFFF; //背景色
private Integer margin = 1;            //白边大小，取值范围0~4
private ErrorCorrectionLevel level = ErrorCorrectionLevel.L;  //二维码容错率

public String getTxt() {
return txt;
}
public void setTxt(String txt) {
this.txt = txt;
}
public String getFilePath() {
return filePath;
}
public void setFilePath(String filePath) {
this.filePath = filePath;
}
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public Integer getWidth() {
return width;
}
public void setWidth(Integer width) {
this.width = width;
}
public Integer getHeight() {
return height;
}
public void setHeight(Integer height) {
this.height = height;
}
public String getQrCodeUrl() {
return qrCodeUrl;
}
public void setQrCodeUrl(String qrCodeUrl) {
this.qrCodeUrl = qrCodeUrl;
}
public String getLogoPath() {
return logoPath;
}
public void setLogoPath(String logoPath) {
this.logoPath = logoPath;
}
public Integer getOnColor() {
return onColor;
}
public void setOnColor(Integer onColor) {
this.onColor = onColor;
}
public Integer getOffColor() {
return offColor;
}
public void setOffColor(Integer offColor) {
this.offColor = offColor;
}
public ErrorCorrectionLevel getLevel() {
return level;
}
public void setLevel(ErrorCorrectionLevel level) {
this.level = level;
}

/**
* 返回文件后缀名
* @return
*/
public String getSuffixName(){
String imgName = this.getFileName();
if(imgName != null && !"".equals(imgName)){
String suffix=fileName.substring(fileName.lastIndexOf(".")+1);
return suffix;
}
return "";
}
public Integer getMargin() {
return margin;
}
public void setMargin(Integer margin) {
this.margin = margin;
}
}

3、生成二维码工具类

/**
* @copyright @2015-2016 Abel-Studio.All Rights Reserved
*/
package com.abel.tools.qrcode;

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.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageConfig;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
* @description
* @author Abel.lin
* @date 2016年7月10日 下午4:41:41
*/
public class QRCodeUtil {
private static int width = 300;              //二维码宽度
private static int height = 300;             //二维码高度
private static int onColor = 0xFF000000;     //前景色
private static int offColor = 0xFFFFFFFF;    //背景色
private static int margin = 1;               //白边大小，取值范围0~4
private static ErrorCorrectionLevel level = ErrorCorrectionLevel.L;  //二维码容错率

/**
* 生成二维码
* @param params
* QRCodeParams属性：txt、fileName、filePath不得为空；
* @throws QRParamsException
*/
public static void generateQRImage(QRCodeParams params)throws QRParamsException{
if(params == null
|| params.getFileName() == null
|| params.getFilePath() == null
|| params.getTxt() == null){

throw new QRParamsException("参数错误");
}
try{
initData(params);

String imgPath = params.getFilePath();
String imgName = params.getFileName();
String txt = params.getTxt();

if(params.getLogoPath() != null && !"".equals(params.getLogoPath().trim())){
generateQRImage(txt, params.getLogoPath(), imgPath, imgName, params.getSuffixName());
}else{
generateQRImage(txt, imgPath, imgName, params.getSuffixName());
}
}catch(Exception e){
e.printStackTrace();
}

}

/**
* 生成二维码
* @param txt          //二维码内容
* @param imgPath      //二维码保存物理路径
* @param imgName      //二维码文件名称
* @param suffix       //图片后缀名
*/
public static void generateQRImage(String txt, String imgPath, String imgName, String suffix){

File filePath = new File(imgPath);
if(!filePath.exists()){
filePath.mkdirs();
}

File imageFile = new File(imgPath,imgName);
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
// 指定纠错等级
hints.put(EncodeHintType.ERROR_CORRECTION, level);
// 指定编码格式
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
hints.put(EncodeHintType.MARGIN, margin);   //设置白边
try {
MatrixToImageConfig config = new MatrixToImageConfig(onColor, offColor);
BitMatrix bitMatrix = new MultiFormatWriter().encode(txt,BarcodeFormat.QR_CODE, width, height, hints);
//        	bitMatrix = deleteWhite(bitMatrix);
MatrixToImageWriter.writeToPath(bitMatrix, suffix, imageFile.toPath(), config);
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 生成带logo的二维码图片
* @param txt          //二维码内容
* @param logoPath     //logo绝对物理路径
* @param imgPath      //二维码保存绝对物理路径
* @param imgName      //二维码文件名称
* @param suffix       //图片后缀名
* @throws Exception
*/
public static void generateQRImage(String txt, String logoPath, String imgPath, String imgName, String suffix) throws Exception{

File filePath = new File(imgPath);
if(!filePath.exists()){
filePath.mkdirs();
}

if(imgPath.endsWith("/")){
imgPath += imgName;
}else{
imgPath += "/"+imgName;
}

Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.ERROR_CORRECTION, level);
hints.put(EncodeHintType.MARGIN, margin);  //设置白边
BitMatrix bitMatrix = new MultiFormatWriter().encode(txt, BarcodeFormat.QR_CODE, width, height, hints);
File qrcodeFile = new File(imgPath);
writeToFile(bitMatrix, suffix, qrcodeFile, logoPath);
}

/**
*
* @param matrix 二维码矩阵相关
* @param format 二维码图片格式
* @param file 二维码图片文件
* @param logoPath logo路径
* @throws IOException
*/
public static void writeToFile(BitMatrix matrix,String format,File file,String logoPath) throws IOException {
BufferedImage image = toBufferedImage(matrix);
Graphics2D gs = image.createGraphics();

int ratioWidth = image.getWidth()*2/10;
int ratioHeight = image.getHeight()*2/10;
//载入logo
Image img = ImageIO.read(new File(logoPath));
int logoWidth = img.getWidth(null)>ratioWidth?ratioWidth:img.getWidth(null);
int logoHeight = img.getHeight(null)>ratioHeight?ratioHeight:img.getHeight(null);

int x = (image.getWidth() - logoWidth) / 2;
int y = (image.getHeight() - logoHeight) / 2;

gs.drawImage(img, x, y, logoWidth, logoHeight, null);
gs.setColor(Color.black);
gs.setBackground(Color.WHITE);
gs.dispose();
img.flush();
if(!ImageIO.write(image, format, file)){
throw new IOException("Could not write an image of format " + format + " to " + file);
}
}

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) ? onColor : offColor);
}
}
return image;
}

public static BitMatrix deleteWhite(BitMatrix matrix){
int[] rec = matrix.getEnclosingRectangle();
int resWidth = rec[2] + 1;
int resHeight = rec[3] + 1;

BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
resMatrix.clear();
for (int i = 0; i < resWidth; i++) {
for (int j = 0; j < resHeight; j++) {
if (matrix.get(i + rec[0], j + rec[1]))
resMatrix.set(i, j);
}
}
return resMatrix;
}

private static void initData(QRCodeParams params){
if(params.getWidth() != null){
width = params.getWidth();
}
if(params.getHeight() != null){
height = params.getHeight();
}
if(params.getOnColor() != null){
onColor = params.getOnColor();
}
if(params.getOffColor() != null){
offColor = params.getOffColor();
}
if(params.getLevel() != null){
level = params.getLevel();
}

}
}

4、自定义异常类

/**
* @copyright @2015-2016 Abel-Studio.All Rights Reserved
*/
package com.abel.tools.qrcode;

/**
* @description
* @author Abel.lin
* @date 2016年7月10日 下午4:41:41
*/
public class QRParamsException extends Exception {
private static final long serialVersionUID = 8837582301762730656L;
public QRParamsException() {} //用来创建无参数对象
public QRParamsException(String message) { //用来创建指定参数对象
super(message); //调用超类构造器
}
}


项目源码下载：http://download.csdn.net/detail/rongku/9572265