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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详解

时间:2021-05-19 12:56     来源/作者:大彪_

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!

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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
 * @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 [ 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

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/**
 * 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.

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/**
* 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.

希望本文所述对大家java程序设计有所帮助。

原文链接:https://blog.csdn.net/u010811257/article/details/42521325

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