Java 实现二维码及有Logo 的二维码（SpringMVC+Zxing+Jsp）

来源：互联网发布：探险家时光相册软件编辑：程序博客网时间：2024/06/01 10:15

需求：我们需要把订单信息生成二维码及有Logo 的二维码。

先看下效果图

提交订单

这里写图片描述

生成二维码

这里写图片描述

解析二维码

这里写图片描述

Zxing简介

本次我们使用优秀的开源利器– ZXing，相比而言它更加灵活方便，可以实现多种编码格式。

官网：http://code.google.com/p/zxing/

当然我们需要用到了源码中core和javase下面的相关的架包：

core-3.2.0.jar
javase-3.2.0.jar

都准备好了我们开始编写了。。。

代码编写

SpringMVC 配置可以看我的 SpringMVC 案例：

Java 实现图片水印之文字水印（SpringMVC + Jsp）

Java 实现图片水印之水印图片（SpringMVC + Jsp）

不多说了。。

1.先写Service类

生成二维码
CoderService.java

package com.wenteryan.service;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.OutputStream;import java.util.HashMap;import java.util.Map;import org.springframework.stereotype.Service;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;@Servicepublic class CoderService {    public String encode(String contents, int width, int height, String uploadPath, String realUploadPath, String imageName) {          //生成条形码时的一些配置        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();          // 指定纠错等级,纠错级别（L 7%、M 15%、Q 25%、H 30%）          hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);          // 内容所使用字符集编码          hints.put(EncodeHintType.CHARACTER_SET, "utf-8");             OutputStream out=null;        try {            if(realUploadPath!=null&&realUploadPath!=""){                out = new FileOutputStream(realUploadPath+"/"+imageName);            }        } catch (FileNotFoundException e1) {            // TODO Auto-generated catch block            e1.printStackTrace();        }        BitMatrix bitMatrix;        try {            // 生成二维码              bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);            MatrixToImageWriter.writeToStream(bitMatrix, "png", out);        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return uploadPath+"/"+imageName ;    }  }

添加Logo
LogoConfig .java

package com.wenteryan.service;import java.awt.BasicStroke;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.geom.RoundRectangle2D;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import javax.imageio.ImageIO;import org.springframework.stereotype.Service;import com.sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGImageEncoder;@Servicepublic class LogoConfig {     public String LogoMatrix(File image, String uploadPath, String realUploadPath, String imgPath) {           /**           * 读取二维码图片，并构建绘图对象           */           OutputStream os = null ;         String logoFileName = "logo_"+imgPath ;          try {            Image image2 = ImageIO.read(image) ;            int width = image2.getWidth(null) ;            int height = image2.getHeight(null) ;            BufferedImage bufferImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB) ;            //BufferedImage bufferImage =ImageIO.read(image) ;            Graphics2D g2 = bufferImage.createGraphics();              g2.drawImage(image2, 0, 0, width, height, null) ;            int matrixWidth = bufferImage.getWidth();              int matrixHeigh = bufferImage.getHeight();              //读取Logo图片             BufferedImage logo= ImageIO.read(new File(realUploadPath+"/"+"logo.jpg"));             //开始绘制图片               g2.drawImage(logo,matrixWidth/5*2,matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5, null);//绘制                    BasicStroke stroke = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);                g2.setStroke(stroke);// 设置笔画对象               //指定弧度的圆角矩形               RoundRectangle2D.Float round = new RoundRectangle2D.Float(matrixWidth/5*2, matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5,20,20);               g2.setColor(Color.white);               g2.draw(round);// 绘制圆弧矩形               //设置logo 有一道灰色边框               BasicStroke stroke2 = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);                g2.setStroke(stroke2);// 设置笔画对象               RoundRectangle2D.Float round2 = new RoundRectangle2D.Float(matrixWidth/5*2+2, matrixHeigh/5*2+2, matrixWidth/5-4, matrixHeigh/5-4,20,20);               g2.setColor(new Color(128,128,128));               g2.draw(round2);// 绘制圆弧矩形               g2.dispose();               bufferImage.flush() ;               os = new FileOutputStream(realUploadPath+"/"+logoFileName) ;                JPEGImageEncoder en = JPEGCodec.createJPEGEncoder(os) ;                en.encode(bufferImage) ;        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {            if(os!=null) {                try {                    os.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        }            return uploadPath+"/"+logoFileName ;       }  }

解码
ZxingDecoderService .java

package com.wenteryan.service;import java.awt.image.BufferedImage;import java.io.File;import java.util.HashMap;import java.util.Map;import javax.imageio.ImageIO;import org.springframework.stereotype.Service;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.Result;import com.google.zxing.client.j2se.BufferedImageLuminanceSource;import com.google.zxing.common.HybridBinarizer;@Servicepublic class ZxingDecoderService {    public String zxingdecode(String realImgPath) {        BufferedImage image = null;          Result result = null;          try {              image = ImageIO.read(new File(realImgPath));              if (image == null) {                  System.out.println("the decode image may be not exit.");              }              LuminanceSource source = new BufferedImageLuminanceSource(image);              BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));              Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();              hints.put(DecodeHintType.CHARACTER_SET, "utf-8");              result = new MultiFormatReader().decode(bitmap, hints);              return result.getText();          } catch (Exception e) {              e.printStackTrace();          }          return result.getText() ;    }}

2.写实现类

package com.wenteryan.action;import java.io.File;import javax.servlet.http.HttpSession;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.RequestParam;import org.springframework.web.servlet.ModelAndView;import com.wenteryan.service.CoderService;import com.wenteryan.service.LogoConfig;import com.wenteryan.service.ZxingDecoderService;@Controllerpublic class ZxingEncoderAction {    private LogoConfig logiconfig ;    private ZxingDecoderService zxingDecodeService ;    private CoderService coderService ;    @RequestMapping(value="/zxingdecode", method=RequestMethod.GET)    public ModelAndView zxingdecode(@RequestParam("realImgPath") String realImgPath, HttpSession session) {        String uploadPath = "/images" ;        String realUploadPath = session.getServletContext().getRealPath(uploadPath) ;        String imgPath = realUploadPath+"/"+realImgPath ;        String result = zxingDecodeService.zxingdecode(imgPath) ;        ModelAndView ret = new ModelAndView() ;        ret.addObject("result", result) ;        ret.setViewName("zxingdecode");        return ret ;    }    @RequestMapping(value="/zxingcoder", method=RequestMethod.GET)    public ModelAndView watermark(HttpSession session) throws Exception {        String uploadPath = "/images" ;        String realUploadPath = session.getServletContext().getRealPath(uploadPath) ;        String imageName = "12345"+".png" ;        // 模拟订单详情        String contents = "订单编号：20160512082345"+"\n"+"订单金额：￥ 2050.00"+"\n"+"支付方式：预存款"+"\n"+"配送方式：京东快递" ;          int width = 300;          int height = 300;         String zxingImage = coderService.encode(contents, width, height, uploadPath, realUploadPath, imageName);          File image = new File(realUploadPath+"/"+imageName);         String logoImageUrl = logiconfig.LogoMatrix(image, uploadPath, realUploadPath, imageName) ;        ModelAndView ret = new ModelAndView() ;        ret.addObject("imageUrl", zxingImage) ;        ret.addObject("imageName", imageName) ;        ret.addObject("logoImageUrl", logoImageUrl) ;        ret.setViewName("zxingcoder");        return ret ;    }    @Autowired    public void setLogiconfig(LogoConfig logiconfig) {        this.logiconfig = logiconfig;    }    @Autowired    public void setZxingDecodeService(ZxingDecoderService zxingDecodeService) {        this.zxingDecodeService = zxingDecodeService;    }    @Autowired    public void setCoderService(CoderService coderService) {        this.coderService = coderService;    }  }

3. 编写页面

index.jsp

<div class="panel-body">        <h2>请核对你的订单信息</h2>        <table class="table  table-bordered table-hover">            <thead>            </thead>            <tbody>                <tr><td>订单编号：</td><td>20160512082345</td></tr>                <tr><td>订单金额：</td><td>￥ 2050.00</td></tr>                <tr><td>支付方式：</td><td>预存款</td></tr>                <tr><td>配送方式：</td><td>京东快递</td></tr>            </tbody>          </table>        <br>        <a href="zxingcoder" class="btn btn-success" type="submit">如果无误，确认提交</a>    </div>

zxingcoder.jsp

<div class="panel-heading"><h2>二维码与有Logo 的二维码</h2></div>    <div class="panel-body">        <div class="col-md-6" align="center">        <a href="zxingdecode?realImgPath=${imageName }">        <img class="img-responsive img-rounded" src="${pageContext.request.contextPath}${imageUrl }"/>        <b class="btn btn-success" >我要解码</b>        </a>        </div>        <div class="col-md-6" align="center">        <a href="zxingdecode">        <img class="img-responsive img-rounded" src="${pageContext.request.contextPath}${logoImageUrl }"/>        <b class="btn btn-success" >我要解码</b>        </a>        </div>        <div class="col-md-12">        <br>        <a class="btn btn-warning" href="${pageContext.request.contextPath }">返回</a>        </div>    </div>

zxingdecode.jsp

<div class="panel-heading"><h2>二维码解码数据</h2></div>    <div class="panel-body">        <div class="col-md-12" align="center">        <br><br>        <p>${result }</p>        </div>        <div class="col-md-12">        <br>        <a class="btn btn-warning" href="${pageContext.request.contextPath }">返回</a>        </div>    </div>

总结

二维码每个人都一定不陌生，尤其是在支付宝和微信的努力下，相信每个人都或多或少的使用过”扫一扫“，这个功能而作为开发者，不管是练习还是研究或者是公司的项目，大家都应该有过二维码的开发经验。

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