zxing生成二维码

在哪生成二维码就把下面这个代码放到哪里

<img class="q_code" src="/xiaotong/QRCode/getQ" />

下面是java代码

package com.xiaotong.controller;import java.io.IOException;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;import com.google.zxing.BarcodeFormat;import com.google.zxing.WriterException;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.QRCodeWriter;import com.xiaotong.bean.VersionsNumber;import com.xiaotong.service.app.VersionsNumberAppService;import com.xiaotong.utils.MatrixToImageWriter;@Controller@RequestMapping(value="/QRCode")public class QRCode {    @Autowired    private VersionsNumberAppService versionsNumberAppService;    @RequestMapping(value = "/getQ", method = { RequestMethod.POST, RequestMethod.GET })    public void getqcode(HttpServletResponse resp,HttpServletRequest request ,String id) throws IOException {        int tomCat = request.getLocalPort();//端口号        String ip = request.getLocalAddr();//tomcat运行的ip地址        String path = request.getContextPath();//项目名        System.out.println(ip);        id="http://"+ip+":"+tomCat+path+"/app/xiaotong.jsp";        String url =  id;        if (url != null && !"".equals(url)) {            ServletOutputStream stream = null;            try {                int width = 200;// 图片的宽度                int height = 200;// 高度                stream = resp.getOutputStream();                QRCodeWriter writer = new QRCodeWriter();                BitMatrix m = writer.encode(url, BarcodeFormat.QR_CODE, height, width);                MatrixToImageWriter.writeToStream(m, "jpg", stream);            } catch (WriterException e) {                e.printStackTrace();            } finally {                if (stream != null) {                    stream.flush();                    stream.close();                }            }        }    }}

package com.xiaotong.utils;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.io.OutputStream;import javax.imageio.ImageIO;import com.google.zxing.common.BitMatrix;/** * 二维码 *  * @author admin * */public class MatrixToImageWriter {    private static final int BLACK = 0xFF000000;    private static final int WHITE = 0xFFFFFFFF;    private MatrixToImageWriter() {    }    public static BufferedImage toBufferedImage(BitMatrix matrix) {        int width = matrix.getWidth();        int height = matrix.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, matrix.get(x, y) ? BLACK : WHITE);            }        }        return image;    }    public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {        BufferedImage image = toBufferedImage(matrix);        if (!ImageIO.write(image, format, file)) {            throw new IOException("Could not write an image of format " + format + " to " + file);        }    }    public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException {        BufferedImage image = toBufferedImage(matrix);        if (!ImageIO.write(image, format, stream)) {            throw new IOException("Could not write an image of format " + format);        }    }}

jar包下载

jar包下载地址:http://download.csdn.net/download/qq_37172500/9995432