本文实例讲述了Java实现的生成二维码统计扫描次数并转发到某个地址功能。分享给大家供大家参考，具体如下：
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:
① 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.
② 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
③ 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;
public class TwoDimensionCode {
public static void encoderQRCode(String content, String imgPath) {
encoderQRCode(content, imgPath, "png", 7);
}
public static void encoderQRCode(String content, OutputStream output) {
encoderQRCode(content, output, "png", 7);
}
public static void encoderQRCode(String content, String imgPath, String imgType) {
encoderQRCode(content, imgPath, imgType, 7);
}
public static void encoderQRCode(String content, OutputStream output, String imgType) {
encoderQRCode(content, output, imgType, 7);
}
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();
}
}
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();
}
}
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;
}
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;
}
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 [ sjsky007@gmail.com ]";
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,点击此处本站下载。
2. 生成二维码并且提供外网访问地址方法
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.
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;
@Controller
public class QrcodeController extends baseSpringController {
@Autowired
private CampaignManager campaignManager;
Logger logger = Logger.getLogger(QrcodeController.class);
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("tips:感谢您扫描本次二维码,地址已经失效了,欢迎您访问:物联网广告平台");
}
}
}
好的,到这里就差不多了.
PS：这里再为大家推荐两款二维码相关在线工具供大家参考使用：
在线生成二维码工具(加强版)
http://tools.jb51.net/transcoding/jb51qrcode
在线二维码解码识别工具
http://tools.jb51.net/transcoding/trans_qrcode
更多关于java相关内容感兴趣的读者可查看本站专题：《Java编码操作技巧总结》、《Java数学运算技巧总结》、《Java数据结构与算法教程》、《Java字符与字符串操作技巧总结》、《Java操作DOM节点技巧总结》和《Java缓存操作技巧汇总》
希望本文所述对大家java程序设计有所帮助。
