/**
*
*/
package com.spg.test;
/**
* 項目名稱：weixinpay
*
* @description:二維碼生成<br>
* 注意生成二維碼和解析過程中的編碼必須爲GBK，否則解析過程會出錯。
*
* @author spg
*
* @create_time：2014年5月20日 上午11:26:27
*
* @version V1.0.0
*
*/
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
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.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
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;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
public class QRCodeUtil
{
/**
* 二維碼寬高度默認200
*/
private static final int DEFAULT_IMAGE_WIDTH = 300;
private static final int DEFAULT_IMAGE_HEIGHT = 300;
/**
* 生成帶圖片二維碼時內部圖片大小
*/
private static final int INNER_IMAGE_WIDTH = 60;
private static final int INNER_IMAGE_HEIGHT = 60;
private static final int IMAGE_HALF_WIDTH = INNER_IMAGE_WIDTH / 2;
private static final int FRAME_WIDTH = 2;
/**
* 生成普通二維碼
*
* @param contents 內容
* @param width 二維碼寬度，如果小於0，則按默認大小生成
* @param height 二維碼高度，如果小於0，則按默認大小生成
* @param imgPath 生成後的文件完整存放路徑，包含文件名。形如D:\aa.jpg
*/
public static void encodePR(String contents, int width, int height,
String imgPath)
{
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
// 指定糾錯等級
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
// 指定編碼格式
hints.put(EncodeHintType.CHARACTER_SET, "GBK");
if (width <= 0 || height <= 0)
{
width = DEFAULT_IMAGE_WIDTH;
height = DEFAULT_IMAGE_HEIGHT;
}
try
{
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
BarcodeFormat.QR_CODE, width, height, hints);
MatrixToImageWriter.writeToStream(bitMatrix, "jpg",
new FileOutputStream(imgPath));
} catch (Exception e)
{
e.printStackTrace();
}
}
/**
* 生成帶圖片的二維碼
*
* @param content
* @param width
* @param height
* @param srcImagePath
* @param destImagePath
*/
public static void encodePR(String content, int width, int height,
String srcImagePath, String destImagePath)
{
try
{
ImageIO.write(genBarcode(content, width, height, srcImagePath),
"jpg", new File(destImagePath));
} catch (IOException e)
{
e.printStackTrace();
} catch (WriterException e)
{
e.printStackTrace();
}
}
/**
* 針對二維碼進行解析
*
* @param imgPath 二維碼文件路徑
* @return
*/
public static String decodePR(String imgPath)
{
BufferedImage image = null;
Result result = null;
try
{
image = ImageIO.read(new File(imgPath));
if (image == null)
{
throw new RuntimeException("the decode image may be not exists.");
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
hints.put(DecodeHintType.CHARACTER_SET, "GBK");
result = new MultiFormatReader().decode(bitmap, hints);
return result.getText();
} catch (Exception e)
{
e.printStackTrace();
}
return null;
}
/**
* 創建條形碼
*
* @param contents
* @param width
* @param height
* @param imgPath
*/
public static void encodeBar(String contents, int width, int height,
String imgPath)
{
// 條形碼的最小寬度
int codeWidth = 98;
codeWidth = Math.max(codeWidth, width);
try
{
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
BarcodeFormat.EAN_13, codeWidth, height, null);
MatrixToImageWriter.writeToStream(bitMatrix, "png",
new FileOutputStream(imgPath));
} catch (Exception e)
{
e.printStackTrace();
}
}
/**
* 針對條形碼進行解析
*
* @param imgPath
* @return
*/
public static String decodeBar(String imgPath)
{
BufferedImage image = null;
Result result = null;
try
{
image = ImageIO.read(new File(imgPath));
if (image == null)
{
System.out.println("the decode image may be not exit.");
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
result = new MultiFormatReader().decode(bitmap, null);
return result.getText();
} catch (Exception e)
{
e.printStackTrace();
}
return null;
}
/**
* 把傳入的原始圖像按高度和寬度進行縮放，生成符合要求的圖標
*
* @param srcImageFile
* 源文件地址
* @param height
* 目標高度
* @param width
* 目標寬度
* @param hasFiller
* 比例不對時是否需要補白：true爲補白; false爲不補白;
* @throws IOException
*/
private static BufferedImage scale(String srcImageFile, int height,
int width, boolean hasFiller) throws IOException
{
double ratio = 0.0; // 縮放比例
File file = new File(srcImageFile);
BufferedImage srcImage = ImageIO.read(file);
Image destImage = srcImage.getScaledInstance(width, height,
BufferedImage.SCALE_SMOOTH);
// 計算比例
if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width))
{
if (srcImage.getHeight() > srcImage.getWidth())
{
ratio = (new Integer(height)).doubleValue()
/ srcImage.getHeight();
} else
{
ratio = (new Integer(width)).doubleValue()
/ srcImage.getWidth();
}
AffineTransformOp op = new AffineTransformOp(
AffineTransform.getScaleInstance(ratio, ratio), null);
destImage = op.filter(srcImage, null);
}
if (hasFiller)
{// 補白
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D graphic = image.createGraphics();
graphic.setColor(Color.white);
graphic.fillRect(0, 0, width, height);
if (width == destImage.getWidth(null))
graphic.drawImage(destImage, 0,
(height - destImage.getHeight(null)) / 2,
destImage.getWidth(null), destImage.getHeight(null),
Color.white, null);
else
graphic.drawImage(destImage,
(width - destImage.getWidth(null)) / 2, 0,
destImage.getWidth(null), destImage.getHeight(null),
Color.white, null);
graphic.dispose();
destImage = image;
}
return (BufferedImage) destImage;
}
/**
* 產生帶有圖片的二維碼緩衝圖像
*
* @param content
* @param width
* @param height
* @param srcImagePath
* @return
* @throws WriterException
* @throws IOException
*/
private static BufferedImage genBarcode(String content, int width,
int height, String srcImagePath) throws WriterException,
IOException
{
// 讀取源圖像
BufferedImage scaleImage = scale(srcImagePath, INNER_IMAGE_WIDTH,
INNER_IMAGE_HEIGHT, true);
int[][] srcPixels = new int[INNER_IMAGE_WIDTH][INNER_IMAGE_HEIGHT];
for (int i = 0; i < scaleImage.getWidth(); i++)
{
for (int j = 0; j < scaleImage.getHeight(); j++)
{
srcPixels[i][j] = scaleImage.getRGB(i, j);
}
}
Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();
hint.put(EncodeHintType.CHARACTER_SET, "GBK");
hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 生成二維碼
MultiFormatWriter mutiWriter = new MultiFormatWriter();
BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,
width, height, hint);
// 二維矩陣轉爲一維像素數組
int halfW = matrix.getWidth() / 2;
int halfH = matrix.getHeight() / 2;
int[] pixels = new int[width * height];
for (int y = 0; y < matrix.getHeight(); y++)
{
for (int x = 0; x < matrix.getWidth(); x++)
{
// 讀取圖片
if (x > halfW - IMAGE_HALF_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH
&& y < halfH + IMAGE_HALF_WIDTH)
{
pixels[y * width + x] = srcPixels[x - halfW
+ IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];
}
// 在圖片四周形成邊框
else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
- IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH))
{
pixels[y * width + x] = 0xfffffff;
} else
{
// 此處可以修改二維碼的顏色，可以分別制定二維碼和背景的顏色；
pixels[y * width + x] = matrix.get(x, y) ? 0xff000000
: 0xfffffff;
}
}
}
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
image.getRaster().setDataElements(0, 0, width, height, pixels);
return image;
}
public static void main(String[] args)
{
String imgPath = "d:/pr1.jpg";
String contents = "你好,李四! welcome to zxing!"
+ "\n李四的博客[http://my.oschina.net/cloudcoder]"
+ "\nEmail[[email protected]]";
// 普通二維碼的生成與解析
QRCodeUtil.encodePR(contents, 0, 10, imgPath);
System.out.println("生成二維碼成功");
System.out.println(QRCodeUtil.decodePR(imgPath));
// 帶圖片的二維的生成與解析
imgPath = "d:/pr2.png";
String srcPath = "d:/src.jpg";
QRCodeUtil.encodePR(contents, 300, 300, srcPath, imgPath);
System.out.println("生成帶圖片的二維碼成功");
System.out.println(QRCodeUtil.decodePR(imgPath));
// 條形碼的生成與解析
imgPath = "d:/bar.png";
QRCodeUtil.encodeBar("6923450657713", 105, 50, imgPath);
System.out.println("生成條形碼成功");
System.out.println(QRCodeUtil.decodeBar(imgPath));
}
}
注意：如果使用JDK1.7版本，jar包的maven庫爲：
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.0.1</version>
</dependency>
但是如果使用JDK1.6一下版本編譯，用以上jar包會報錯，改用2.2版本jar包可解決。
zxing2.2.jar下載地址：http://download.csdn.net/detail/fengspg/7378425