java生成二維碼簡單實現（帶圖，純碼都有）

最下面是純二維碼

配置pom文件

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

創建工具類

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;

public class QRCodeUtils {
    private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "JPG";
    // 二維碼尺寸    
    private static final int QRCODE_SIZE = 300;
    // LOGO寬度    
    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<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 (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 插入圖片    
        QRCodeUtils.insertImage(image, imgPath, needCompress);
        return image;
    }

    /**
     * 插入LOGO  
     *
     * @param source
     *            二維碼圖片  
     * @param imgPath
     *            LOGO圖片地址  
     * @param needCompress
     *            是否壓縮  
     * @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+"   該文件不存在！");
            return;
        }
        Image src = ImageIO.read(new File(imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 壓縮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); // 繪製縮小後的圖    
            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)  
     *
     * @param content
     *            內容  
     * @param imgPath
     *            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 imgPath, String destPath,
                              boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtils.createImage(content, imgPath,
                needCompress);
        mkdirs(destPath);
        String file = new Random().nextInt(99999999)+".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        return file;
    }

    /**
     * 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)  
     * @date 2013-12-11 上午10:16:36  
     * @param destPath 存放目錄  
     */
    public static void mkdirs(String destPath) {
        File file =new File(destPath);
        //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)    
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }

    /**
     * 生成二維碼(內嵌LOGO)  
     *
     * @param content
     *            內容  
     * @param imgPath
     *            LOGO地址  
     * @param destPath
     *            存儲地址  
     * @throws Exception
     */
    public static void encode(String content, String imgPath, String destPath)
            throws Exception {
        QRCodeUtils.encode(content, imgPath, 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 void encode(String content, String destPath,
                              boolean needCompress) throws Exception {
        QRCodeUtils.encode(content, null, destPath, needCompress);
    }

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

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

    
}  

測試

//二維碼
    @AuthIgnore
    @RequestMapping("erweima")
    public void erweima() throws Exception {
        String text = "https://blog.csdn.net/qq_45777315";  //這裏設置自定義網站url或文字
        String logoPath = "D:\\zxc\\1.jpg"; //二維碼圖片
        String destPath = "D:\\zxc\\";		//保存地址
        //調用工具類
        System.out.println(QRCodeUtils.encode(text, logoPath, destPath, true));
    }

純二維碼

		String content= "https://blog.csdn.net/qq_45777315";  //這裏設置自定義網站url或文字
        String path= "D:/zxc/";		//保存地址
/**
     * zyh
     * 純二維碼
     */
    public static String code(String content,String path) {
        try {
            String codeName = UUID.randomUUID().toString();// 二維碼的圖片名
            String imageType = "jpg";// 圖片類型
            MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
            Map<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 200, 200, hints);
            File file1 = new File(path, codeName + "." + imageType);
            MatrixToImageWriter.writeToFile(bitMatrix, imageType, file1);
            return codeName+".jpg";
        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }