java生成二维码

1.文件分布

2.工具类代码

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.text.SimpleDateFormat;
import java.util.Date;
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.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class QRCodeUtil {
    private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "JPG";
    private static final int QRCODE_SIZE = 300;
    private static final int WIDTH = 60;
    private static final int HEIGHT = 60;

    @SuppressWarnings({ "rawtypes", "unchecked" })
    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;
        }
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }
   
    private static void insertImage(BufferedImage source, String imgPath,boolean needCompress) throws Exception {
        File file = new File(imgPath);
        if (!file.exists()) {
            System.err.println(""+imgPath+" The file does not exist");
            return;
        }
        Image src = ImageIO.read(new File(imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) {
            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); 
            g.dispose();
            src = image;
        }
        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();
    }

    public static void encode(String content, String imgPath, String destPath,
            boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress);
        mkdirs(destPath);
        Date date = new Date();
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
        String str = format.format(date);
        String file = str +".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        System.out.println("二维码已生成，在"+destPath+"文件夹下");//The two-dimensional code has been generated , is located in the destPath folder
    }

    public static void mkdirs(String destPath) {
        File file =new File(destPath);   
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }

}

3.测试类代码

import java.util.Scanner;

public class Test {

    /**
     * @param args
     */
    public static void main(String[] args) {
        try {
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入内容：");
            String content = scanner.nextLine();
            if(content.isEmpty())Test.main(args);
            QRCodeUtil.encode(content,"","D:/QRcode",true);
        } catch (Exception e) {
            e.printStackTrace();
        }
        Test.main(args);
    }
}

4.jar包下载路径

http://pan.baidu.com/s/1pLAvw75

 

 

注：该程序的编码均为GBK编码，否则会出现奇数中文最后一个字乱码