package yanzm;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;
import javax.imageio.ImageIO;
import org.junit.Test;
import com.alibaba.fastjson.JSONObject;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
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.NotFoundException;
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;
public class yzm {
public static void main(String[] args)throws WriterException, IOException {
testEncode();
}

/**
* 生成圖像
*
* @throws WriterException
* @throws IOException
*/
public static void testEncode() throws WriterException, IOException {
String filePath = "D://";
String fileName = "zxing.png";
JSONObject json = new JSONObject();
json.put( "zxing","https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing");
json.put("author", "shihy");
String content = json.toJSONString();// 內容
int width = 200; // 圖像寬度
int height = 200; // 圖像高度
String format = "png";// 圖像類型
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
BarcodeFormat.QR_CODE, width, height, hints);// 生成矩陣
Path path = FileSystems.getDefault().getPath(filePath, fileName);
MatrixToImageWriter.writeToPath(bitMatrix, format, path);// 輸出圖像
System.out.println("輸出成功.");
}

/**
* 解析圖像
*/
public void testDecode() {
String filePath = "D://zxing.png";
BufferedImage image;
try {
image = ImageIO.read(new File(filePath));
LuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 對圖像進行解碼
JSONObject content = JSONObject.parseObject(result.getText());
System.out.println("圖片中內容： ");
System.out.println("author： " + content.getString("author"));
System.out.println("zxing： " + content.getString("zxing"));
System.out.println("圖片中格式： ");
System.out.println("encode： " + result.getBarcodeFormat());
} catch (IOException e) {
e.printStackTrace();
} catch (NotFoundException e) {
e.printStackTrace();
}
}
}

--------------------------------------------------------二 帶logo地址：http://blog.csdn.net/wangnan537/article/details/50353174---------------------------------------------------------------------------

package yanzm;
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.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
* 二維碼工具類
*
*/
public class QRCodeUtil {
private static final String CHARSET = "utf-8";
private static final String FORMAT = "JPG";
// 二維碼尺寸
private static final int QRCODE_SIZE = 300;
// LOGO寬度
private static final int LOGO_WIDTH = 60;
// LOGO高度
private static final int LOGO_HEIGHT = 60;

private static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
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 (logoPath == null || "".equals(logoPath)) {
return image;
}
// 插入圖片
QRCodeUtil.insertImage(image, logoPath, needCompress);
return image;
}

/**
* 插入LOGO
*
* @param source
* 二維碼圖片
* @param logoPath
* LOGO圖片地址
* @param needCompress
* 是否壓縮
* @throws Exception
*/
private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception {
File file = new File(logoPath);
if (!file.exists()) {
throw new Exception("logo file not found.");
}
Image src = ImageIO.read(new File(logoPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 壓縮LOGO
if (width > LOGO_WIDTH) {
width = LOGO_WIDTH;
}
if (height > LOGO_HEIGHT) {
height = LOGO_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); // 繪制縮小後的圖
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();
}

/**
* 生成二維碼(內嵌LOGO)
* 二維碼文件名隨機，文件名可能會有重復
*
* @param content
* 內容
* @param logoPath
* LOGO地址
* @param destPath
* 存放目錄
* @param needCompress
* 是否壓縮LOGO
* @throws Exception
*/
public static String encode(String content, String logoPath, String destPath, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
mkdirs(destPath);
String fileName = new Random().nextInt(99999999) + "." + FORMAT.toLowerCase();
ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName));
return fileName;
}

/**
* 生成二維碼(內嵌LOGO)
* 調用者指定二維碼文件名
*
* @param content
* 內容
* @param logoPath
* LOGO地址
* @param destPath
* 存放目錄
* @param fileName
* 二維碼文件名
* @param needCompress
* 是否壓縮LOGO
* @throws Exception
*/
public static String encode(String content, String logoPath, String destPath, String fileName, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
mkdirs(destPath);
fileName = fileName.substring(0, fileName.indexOf(".")>0?fileName.indexOf("."):fileName.length())
+ "." + FORMAT.toLowerCase();
ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName));
return fileName;
}

/**
* 當文件夾不存在時，mkdirs會自動創建多層目錄，區別於mkdir．
* (mkdir如果父目錄不存在則會拋出異常)
* @param destPath
* 存放目錄
*/
public static void mkdirs(String destPath) {
File file = new File(destPath);
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}

/**
* 生成二維碼(內嵌LOGO)
*
* @param content
* 內容
* @param logoPath
* LOGO地址
* @param destPath
* 存儲地址
* @throws Exception
*/
public static String encode(String content, String logoPath, String destPath) throws Exception {
return QRCodeUtil.encode(content, logoPath, destPath, false);
}

/**
* 生成二維碼
*
* @param content
* 內容
* @param destPath
* 存儲地址
* @param needCompress
* 是否壓縮LOGO
* @throws Exception
*/
public static String encode(String content, String destPath, boolean needCompress) throws Exception {
return QRCodeUtil.encode(content, null, destPath, needCompress);
}

/**
* 生成二維碼
*
* @param content
* 內容
* @param destPath
* 存儲地址
* @throws Exception
*/
public static String encode(String content, String destPath) throws Exception {
return QRCodeUtil.encode(content, null, destPath, false);
}

/**
* 生成二維碼(內嵌LOGO)
*
* @param content
* 內容
* @param logoPath
* LOGO地址
* @param output
* 輸出流
* @param needCompress
* 是否壓縮LOGO
* @throws Exception
*/
public static void encode(String content, String logoPath, OutputStream output, boolean needCompress)
throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
ImageIO.write(image, FORMAT, output);
}

/**
* 生成二維碼
*
* @param content
* 內容
* @param output
* 輸出流
* @throws Exception
*/
public static void encode(String content, OutputStream output) throws Exception {
QRCodeUtil.encode(content, null, output, false);
}

/**
* 解析二維碼
*
* @param file
* 二維碼圖片
* @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<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
result = new MultiFormatReader().decode(bitmap, hints);
String resultStr = result.getText();
return resultStr;
}

/**
* 解析二維碼
*
* @param path
* 二維碼圖片地址
* @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://www.baidu.com";
//不含Logo
//QRCodeUtil.encode(text, null, "e:\\", true);
//含Logo，不指定二維碼圖片名
//QRCodeUtil.encode(text, "e:\\csdn.jpg", "e:\\", true);
//含Logo，指定二維碼圖片名
QRCodeUtil.encode(text, "e:\\csdn.jpg", "e:\\", "qrcode", true);
}
}