需求:近几天某个项目需要用户录入个自己的网址,然后系统需要根据用户的的网址生成二维码,然后用户可以拿着它给别人扫描,访问到他录入的网址,在这个过程中.我需要知道用户的二维码被扫描的次数,也就是后面根据其可以做一些扫描排名之类的.
思路:
- 先生成二维码,csdn已经有前辈写了,那么我就直接拿过来用了.
- 将用户的id,和用户录入的网址处理之后作为http get参数封装到二维码中,然后用户扫描会自动跳转到我们系统的某个接口
- 在接口中根据用户id将用户查询出来,扫描次数加1后重定向到用户录入页面
代码实现:
1.生成二维码部分,引用了前辈的成果,点个赞,用起来感觉不错!
package javacommon.qrcode; import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import javax.imageio.ImageIO; import org.junit.Test; import jp.sourceforge.qrcode.QRCodeDecoder; import jp.sourceforge.qrcode.exception.DecodingFailedException; import com.swetake.util.Qrcode; /** * 创建二维码工具类,将类改成了静态工具类 * @author Bill * @see 源来自: http://blog.csdn.net/wangpeng047/article/details/7181217 * @since V1.0 2014/01/07 */ public class TwoDimensionCode { /*private TwoDimensionCode() { }*/ /** * 生成二维码(QRCode)图片 * @param content 存储内容 * @param imgPath 图片路径 */ public static void encoderQRCode(String content, String imgPath) { encoderQRCode(content, imgPath, "png", 7); } /** * 生成二维码(QRCode)图片 * @param content 存储内容 * @param output 输出流 */ public static void encoderQRCode(String content, OutputStream output) { encoderQRCode(content, output, "png", 7); } /** * 生成二维码(QRCode)图片 * @param content 存储内容 * @param imgPath 图片路径 * @param imgType 图片类型 */ public static void encoderQRCode(String content, String imgPath, String imgType) { encoderQRCode(content, imgPath, imgType, 7); } /** * 生成二维码(QRCode)图片 * @param content 存储内容 * @param output 输出流 * @param imgType 图片类型 */ public static void encoderQRCode(String content, OutputStream output, String imgType) { encoderQRCode(content, output, imgType, 7); } /** * 生成二维码(QRCode)图片 * @param content 存储内容 * @param imgPath 图片路径 * @param imgType 图片类型 * @param size 二维码尺寸 */ public static void encoderQRCode(String content, String imgPath, String imgType, int size) { try { BufferedImage bufImg = qRCodeCommon(content, imgType, size); File imgFile = new File(imgPath); // 生成二维码QRCode图片 ImageIO.write(bufImg, imgType, imgFile); } catch (Exception e) { e.printStackTrace(); } } /** * 生成二维码(QRCode)图片 * @param content 存储内容 * @param output 输出流 * @param imgType 图片类型 * @param size 二维码尺寸 */ public static void encoderQRCode(String content, OutputStream output, String imgType, int size) { try { BufferedImage bufImg = qRCodeCommon(content, imgType, size); // 生成二维码QRCode图片 ImageIO.write(bufImg, imgType, output); } catch (Exception e) { e.printStackTrace(); } } /** * 生成二维码(QRCode)图片的公共方法 * @param content 存储内容 * @param imgType 图片类型 * @param size 二维码尺寸 取值范围1-40,值越大尺寸越大,可存储的信息越大 * @return */ private static BufferedImage qRCodeCommon(String content, String imgType, int size) { BufferedImage bufImg = null; try { Qrcode qrcodeHandler = new Qrcode(); // 设置二维码排错率,可选L(7%)、M(15%)、Q(25%)、H(30%),排错率越高可存储的信息越少,但对二维码清晰度的要求越小 qrcodeHandler.setQrcodeErrorCorrect('M'); qrcodeHandler.setQrcodeEncodeMode('B'); // 设置设置二维码尺寸,取值范围1-40,值越大尺寸越大,可存储的信息越大 qrcodeHandler.setQrcodeVersion(size); // 获得内容的字节数组,设置编码格式 byte[] contentBytes = content.getBytes("utf-8"); // 图片尺寸 int imgSize = 67 + 12 * (size - 1); bufImg = new BufferedImage(imgSize, imgSize, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); // 设置背景颜色 gs.setBackground(Color.WHITE); gs.clearRect(0, 0, imgSize, imgSize); // 设定图像颜色> BLACK gs.setColor(Color.BLACK); // 设置偏移量,不设置可能导致解析出错 int pixoff = 2; // 输出内容> 二维码 if (contentBytes.length > 0 && contentBytes.length < 800) { boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes); for (int i = 0; i < codeOut.length; i++) { for (int j = 0; j < codeOut.length; j++) { if (codeOut[j][i]) { gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3); } } } } else { throw new Exception("QRCode content bytes length = " + contentBytes.length + " not in [0, 800]."); } gs.dispose(); bufImg.flush(); } catch (Exception e) { e.printStackTrace(); } return bufImg; } /** * 解析二维码(QRCode) * @param imgPath 图片路径 * @return */ public static String decoderQRCode(String imgPath) { // QRCode 二维码图片的文件 File imageFile = new File(imgPath); BufferedImage bufImg = null; String content = null; try { bufImg = ImageIO.read(imageFile); QRCodeDecoder decoder = new QRCodeDecoder(); content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8"); } catch (IOException e) { System.out.println("Error: " + e.getMessage()); e.printStackTrace(); } catch (DecodingFailedException dfe) { System.out.println("Error: " + dfe.getMessage()); dfe.printStackTrace(); } return content; } /** * 解析二维码(QRCode) * @param input 输入流 * @return */ public static String decoderQRCode(InputStream input) { BufferedImage bufImg = null; String content = null; try { bufImg = ImageIO.read(input); QRCodeDecoder decoder = new QRCodeDecoder(); content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8"); } catch (IOException e) { System.out.println("Error: " + e.getMessage()); e.printStackTrace(); } catch (DecodingFailedException dfe) { System.out.println("Error: " + dfe.getMessage()); dfe.printStackTrace(); } return content; } public static void main(String[] args) { String imgPath = "E:/01.png"; //String encoderContent = "Hello 大大、小小,welcome to QRCode!" + "\nMyblog [ http://sjsky.iteye.com ]" + "\nEMail [ [email protected] ]"; TwoDimensionCode handler = new TwoDimensionCode(); //handler.encoderQRCode(encoderContent, imgPath, "png"); // try { // OutputStream output = new FileOutputStream(imgPath); // handler.encoderQRCode(content, output); // } catch (Exception e) { // e.printStackTrace(); // } // System.out.println("========encoder success"); String decoderContent = handler.decoderQRCode(imgPath); System.out.println("解析结果如下:"); System.out.println(decoderContent); System.out.println("========decoder success!!!"); } @Test public void test01() throws UnsupportedEncodingException{ String msg = "http://baike.baidu.com/link?YVWkHK4xQVWK444yX444yXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5ZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHK4n4aZGWU6z5sMY35SyXZxQMYVWkHKIkmbrHT9-s2WBaEbS哈哈哪里拉萨的"; System.out.println("normal:"+msg.length()); System.out.println("bytes:"+msg.getBytes("UTF-8").length); encoderQRCode(msg.toString(),"E:/2/t7.png", "png", 40); System.out.println("ok"); } }
package javacommon.qrcode; import java.awt.image.BufferedImage; import jp.sourceforge.qrcode.data.QRCodeImage; public class TwoDimensionCodeImage implements QRCodeImage { BufferedImage bufImg; public TwoDimensionCodeImage(BufferedImage bufImg) { this.bufImg = bufImg; } @Override public int getHeight() { return bufImg.getHeight(); } @Override public int getPixel(int x, int y) { return bufImg.getRGB(x, y); } @Override public int getWidth() { return bufImg.getWidth(); } }
还有个jar包,附上下载地址:http://pan.baidu.com/s/1jGmoshK
2.生成二维码并且提供外网访问地址方法
<span style="white-space:pre"> </span>/** * 根据用户给的地址,生成一个二维码,并存放到本地. 返回出外网访问地址 * @param qrCodeTargetUrl 用户传入的地址 * @param campaign 活动编号 * @return * @throws UnsupportedEncodingException */ private String generator2Code(String qrCodeTargetUrl,Campaign campaign) throws UnsupportedEncodingException { // TODO 实现二维码创建 if(!StringUtils.isEmpty(qrCodeTargetUrl)){ String httpUrl = AppConfig.getProperty("fileVisitUrl"); String localUrl = AppConfig.getProperty("uploadFileBasePath"); // 文件名 StringBuilder userOfUrl = new StringBuilder("qrcode/"); userOfUrl.append(campaign.getUser().getEmail() + "/"); userOfUrl.append(campaign.get_id() + "/"); new File(localUrl + userOfUrl).mkdirs(); // 创建文件夹 userOfUrl.append("qrcode.png"); // 生成扫描地址 StringBuilder qrcodeScannerUrl = new StringBuilder(); { qrcodeScannerUrl.append(AppConfig.getProperty("qrcodeScannerUrl")); qrcodeScannerUrl.append("t="+URLEncoder.encode(qrCodeTargetUrl, "UTF-8")); qrcodeScannerUrl.append("&i="+campaign.get_id()); } long targetUrlLength = qrcodeScannerUrl.toString().getBytes("UTF-8").length; int qrcodeSize = 0; // 控制生成的二维码大小 if(targetUrlLength <= 120 ){ // 7 qrcodeSize = 7; }else if(targetUrlLength <= 410){ // 15 qrcodeSize = 15; }else{ qrcodeSize = 20; // 这里最大20已经能满足需要了,最大可以设置为40 } TwoDimensionCode.encoderQRCode( qrcodeScannerUrl.toString(), localUrl + userOfUrl, "png", qrcodeSize); return httpUrl + userOfUrl; } return StringUtils.EMPTY; }
3.扫描生成的所有的二维码会访问的接口,在这里进行扫描统计.
/** * 文件名:QrcodeController.java * 版权:Copyright 2014-2015 BuyanTech.All Rights Reserved. * 描述: 负责累加广告的扫描次数 * 修改人:Bill * 修改时间:2014/01/07 * 修改内容: 无 */package com.buyantech.campaign.controller; import java.io.IOException; import javacommon.base.BaseSpringController; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.StringUtils; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import com.buyantech.campaign.model.Campaign; import com.buyantech.campaign.service.CampaignManager; import com.buyantech.campaign.util.AppConfig; /** * 负责累加广告的扫描次数 * @author Bill * @since V1.0 2014/01/07 */ @Controller public class QrcodeController extends BaseSpringController { @Autowired private CampaignManager campaignManager; Logger logger = Logger.getLogger(QrcodeController.class); /** * 用作增加广告二维码扫描次数,和转发 * @param request * @param response * @throws IOException */ public void q(HttpServletRequest request,HttpServletResponse response) throws IOException{ String targetUrl = request.getParameter("t"); // targerUrl : 目标地址 String camId = request.getParameter("i"); // camId : 广告编号 boolean isAddSuccess = false; int scannerSize = -1; if(!StringUtils.isEmpty(camId)){ Campaign campaign = campaignManager.findById(camId); if (campaign != null) { scannerSize = campaign.getQrCodeScanCount() + 1; campaign.setQrCodeScanCount(scannerSize); isAddSuccess = true; campaignManager.save(campaign); } } // 判断是否累加成功 if(!isAddSuccess){ logger.error("用户扫描目标二维码地址为:"+targetUrl+",扫描累加记录失败!"); }else{ logger.info("广告编号:"+camId+"被扫描,当前累积次数为:"+scannerSize); } // 判断是否携带地址,理论上是不存在地址为空的.可能被hacker恶意修改,友好提示! if(!StringUtils.isEmpty(targetUrl)){ response.sendRedirect(targetUrl); }else{ response.getWriter().print("<h3>tips:感谢您扫描本次二维码,地址已经失效了,欢迎您访问:<a href=\""+AppConfig.getProperty("serverUrl")+"\">物联网广告平台</a></h3>"); } } }
好的,到这里就差不多了.
时间: 2024-10-27 13:45:52