二维码生成Java实现代码

二维码生成Java实现代码

本文实例为大家分享了二维码生成java实现代码，供大家参考，具体内容如下

package com.yihaomen.barcode;

import java.awt.BasicStroke;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.Shape;

import java.awt.geom.RoundRectangle2D;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.OutputStream;

import java.util.Hashtable;

import java.util.Random;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.BinaryBitmap;

import com.google.zxing.DecodeHintType;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatReader;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.Result;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.common.HybridBinarizer;

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

/**

* 二维码工具类

*

*/

public class QRCodeUtil {

private static final String CHARSET = "utf-8";

private static final String FORMAT_NAME = "JPG";

// 二维码尺寸

private static final int QRCODE_SIZE = 300;

// LOGO宽度

private static final int WIDTH = 60;

// LOGO高度

private static final int HEIGHT = 60;

private static BufferedImage createImage(String content, String imgPath,

boolean needCompress) throws Exception {

Hashtable hints = new Hashtable();

hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

hints.put(EncodeHintType.CHARACTER_SET, CHARSET);

hints.put(EncodeHintType.MARGIN, 1);

BitMatrix bitMatrix = new MultiFormatWriter().encode(content,

BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);

int width = bitMatrix.getWidth();

int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000

: 0xFFFFFFFF);

}

}

if (imgPath == null || "".equals(imgPath)) {

return image;

}

// 插入图片

QRCodeUtil.insertImage(image, imgPath, needCompress);

return image;

}

/**

* 插入LOGO

*

* @param source

* 二维码图片

* @param imgPath

* LOGO图片地址

* @param needCompress

* 是否压缩

* @throws Exception

*/

private static void insertImage(BufferedImage source, String imgPath,

boolean needCompress) throws Exception {

File file = new File(imgPath);

if (!file.exists()) {

System.err.println(""+imgPath+" 该文件不存在！");

return;

}

Image src = ImageIO.read(new File(imgPath));

int width = src.getWidth(null);

int height = src.getHeight(null);

if (needCompress) { // 压缩LOGO

if (width > WIDTH) {

width = WIDTH;

}

if (height > HEIGHT) {

height = HEIGHT;

}

Image image = src.getScaledInstance(width, height,

Image.SCALE_SMOOTH);

BufferedImage tag = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

Graphics g = tag.getGraphics();

g.drawImage(image, 0, 0, null); // 绘制缩小后的图

g.dispose();

src = image;

}

// 插入LOGO

Graphics2D graph = source.createGraphics();

int x = (QRCODE_SIZE - width) / 2;

int y = (QRCODE_SIZE - height) / 2;

graph.drawImage(src, x, y, width, height, null);

Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);

graph.setStroke(new BasicStroke(3f));

graph.draw(shape);

graph.dispose();

}

/**

* 生成二维码(内嵌LOGO)

*

* @param content

* 内容

* @param imgPath

* LOGO地址

* @param destPath

* 存放目录

* @param needCompress

* 是否压缩LOGO

* @throws Exception

*/

public static void encode(String content, String imgPath, String destPath,

boolean needCompress) throws Exception {

BufferedImage image = QRCodeUtil.createImage(content, imgPath,

needCompress);

mkdirs(destPath);

String file = new Random().nextInt(99999999)+".jpg";

ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));

}

/**

* 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)

* @author lanyuan

* Email: mmm333zzz520@163.com

* @date 2013-12-11 上午10:16:36

* @param destPath 存放目录

*/

public static void mkdirs(String destPath) {

File file =new File(destPath);

//当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)

if (!file.exists() && !file.isDirectory()) {

file.mkdirs();

}

}

/**

* 生成二维码(内嵌LOGO)

*

* @param content

* 内容

* @param imgPath

* LOGO地址

* @param destPath

* 存储地址

* @throws Exception

*/

publhttp://ic static void encode(String content, String imgPath, String destPath)

throws Exception {

QRCodeUtil.encode(content, imgPath, destPath, false);

}

/**

* 生成二维码

*

* @param content

* 内容

* @param destPath

* 存储地址

* @param needCompress

* 是否压缩LOGO

* @throws Exception

*/

public static void encode(String content, String destPath,

boolean needCompress) throws Exception {

QRCodeUtil.encode(content, null, destPath, needCompress);

}

/**

* 生成二维码

*

* @param content

* 内容

* @param destPath

* 存储地址

* @throws Exception

*/

public static void encode(String content, String destPath) throws Exception {

QRCodeUtil.encode(content, null, destPath, false);

}

/**

* 生成二维码(内嵌LOGO)

*

* @param content

* 内容

* @param imgPath

* LOGO地址

* @param output

* 输出流

* @param needCompress

* 是否压缩LOGO

* @throws Exception

*/

public static void encode(String content, String imgPath,

OutputStream output, boolean needCompress) throws Exception {

BufferedImage image = QRCodeUtil.createImage(content, imgPath,

needCompress);

ImageIO.write(image, FORMAT_NAME, output);

}

/**

* 生成二维码

*

* @param content

* 内容

* @param output

* 输出流

* @throws Exception

*/

public static void encode(String content, OutputStream output)

throws Exception {

QRCodeUtil.encode(content, null, output, false);

}

/**

* 解析二维码

*

* @param file

* 二维码图片

* @return

* @throws Exception

*/

public static String decode(File file) throws Exception {

BufferedImage image;

image = ImageIO.read(file);

if (image == null) {

return null;

}

BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(

image);

BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

Result result;

Hashtable hints = new Hashtable();

hints.put(DecodeHintType.CHARACTER_SET, CHARSET);

result = new MultiFormatReader().decode(bitmap, hints);

String resultStr = result.getText();

return resultStr;

}

/**

* 解析二维码

*

* @param path

* 二维码图片地址

* @return

* @throws Exception

*/

public static String decode(String path) throws Exception {

return QRCodeUtil.decode(new File(path));

}

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

String text = "http://yihaomen.com";

QRCodeUtil.encode(text, "c:/me.jpg", "c:/barcode", true);

}

}

大家可以参考专题：java二维码进行学习

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