生成二维码

pom.xml

@@ -232,6 +232,16 @@
			<artifactId>lombok</artifactId>
			<version>${lombok.version}</version>
		</dependency>
		<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>
	</dependencies>
	<build>

src/main/java/io/renren/modules/app/controller/QRCodeTest.java

@@ -0,0 +1,49 @@
package io.renren.modules.app.controller;
import io.renren.common.utils.R;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.apache.commons.io.IOUtils;
import io.renren.modules.app.utils.QRCodeUtils;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
/**
 * APP测试接口
 *
 * @author Mark sunlightcs@gmail.com
 */
@RestController
@RequestMapping("/app")
@Api("二维码测试接口")
public class QRCodeTest {
    @Autowired
	private QRCodeUtils qRCodeUtils;
    @GetMapping("qcodetest.jpg")
    @ApiOperation("获取二维码图片")
    public void  getCodeImg(HttpServletResponse response, String text){
        response.setHeader("Cache-Control", "no-store, no-cache");
		response.setContentType("image/jpeg");
		//获取图片验证码
		// BufferedImage image = qRCodeUtils.encode(text);
		ServletOutputStream out = response.getOutputStream();
		// ImageIO.write(image, "jpg", out);
		qRCodeUtils.encode(text, out);
		IOUtils.closeQuietly(out);
    }
}

src/main/java/io/renren/modules/app/utils/QRCodeUtils.java

@@ -0,0 +1,271 @@
package io.renren.modules.app.utils;
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<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;
        }
        // 插入图片    
        QRCodeUtils.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 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;
    }
    /**
     * 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)  
     * @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
     */
    public static void encode(String content, String imgPath, String destPath)
            throws Exception {
        QRCodeUtils.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 {
        QRCodeUtils.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 {
        QRCodeUtils.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 = QRCodeUtils.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 {
        QRCodeUtils.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<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;
    }
    /**
     * 解析二维码  
     *
     * @param path
     *            二维码图片地址  
     * @return
     * @throws Exception
     */
    public static String decode(String path) throws Exception {
        return QRCodeUtils.decode(new File(path));
    }
    // public static void main(String[] args) throws Exception {
    //     String text = "http://www.baidu.com";  //这里设置自定义网站url
    //     String logoPath = "C:\\Users\\admin\\Desktop\\test\\test.jpg";
    //     String destPath = "C:\\Users\\admin\\Desktop\\test\\";
    //     System.out.println(QRCodeUtils.encode(text, logoPath, destPath, true));
    // }
}