为数据列表的每条记录生成对应的二维码

效果图：

一、前端

html 复制代码

<!DOCTYPE html>
<html lang="zh" xmlns:th="http://www.thymeleaf.org" xmlns:shiro="http://www.pollix.at/thymeleaf/shiro">
<head>
    <th:block th:include="include :: header('固定资产信息列表')" />
</head>
<body class="gray-bg">
     <div class="container-div">
        <div class="row">
            <div class="col-sm-12 search-collapse">
                <form id="formId">
                    <div class="select-list">
                        <ul>
                            <li>
                                <label>资产名称：</label>
                                <input type="text" name="zcmc"/>
                            </li>
                            <li>
                                <label>资产型号：</label>
                                <input type="text" name="zcxh"/>
                            </li>
                            <li>
                                <a class="btn btn-primary btn-rounded btn-sm" onclick="$.table.search()"><i class="fa fa-search"></i>&nbsp;搜索</a>
                                <a class="btn btn-warning btn-rounded btn-sm" onclick="$.form.reset()"><i class="fa fa-refresh"></i>&nbsp;重置</a>
                            </li>
                        </ul>
                    </div>
                </form>
            </div>

            <div class="btn-group-sm" id="toolbar" role="group">
                <a class="btn btn-success" onclick="$.operate.add()" shiro:hasPermission="biz:gdzcxx:add">
                    <i class="fa fa-plus"></i> 添加
                </a>
                <a class="btn btn-primary single disabled" onclick="$.operate.edit()" shiro:hasPermission="biz:gdzcxx:edit">
                    <i class="fa fa-edit"></i> 修改
                </a>
                <a class="btn btn-danger multiple disabled" onclick="$.operate.removeAll()" shiro:hasPermission="biz:gdzcxx:remove">
                    <i class="fa fa-remove"></i> 删除
                </a>
                <a class="btn btn-warning" onclick="$.table.exportExcel()" shiro:hasPermission="biz:gdzcxx:export">
                    <i class="fa fa-download"></i> 导出
                </a>
            </div>
            <div class="col-sm-12 select-table table-striped">
                <table id="bootstrap-table"></table>
            </div>
        </div>
    </div>
    <th:block th:include="include :: footer" />
    <script th:inline="javascript">
        var qrcodeFlag = [[${@permission.hasPermi('biz:gdzcxx:createQRCode')}]];
        var editFlag = [[${@permission.hasPermi('biz:gdzcxx:edit')}]];
        var removeFlag = [[${@permission.hasPermi('biz:gdzcxx:remove')}]];
        var prefix = ctx + "biz/gdzcxx";

        //生成二维码
        function createQRCode(id){
            $.ajax({
                url: prefix + "/createQRCode",
                data: {gdzcxxid:id},
                type: 'POST',
                success: function (result) {
                    $.table.refresh();
                }
            });
        }
        $(function() {
            var options = {
                url: prefix + "/list",
                createUrl: prefix + "/add",
                updateUrl: prefix + "/edit/{id}",
                removeUrl: prefix + "/remove",
                exportUrl: prefix + "/export",
                modalName: "固定资产信息",
                columns: [{
                    checkbox: true
                },
                {
                    field: 'gdzcxxId',
                    title: '资产ID'
                },
                {
                    field: 'zcmc',
                    title: '资产名称'
                },
                {
                    field: 'zcxh',
                    title: '资产型号'
                },
                {
                    field: 'ewm',
                    title: '二维码',
                    formatter:function(value, row, index){
                        var imageDataUrl = 'data:image/png;base64,' + value;
                        return "<img src='"+imageDataUrl+"' width='100' height='100' />";
                    }
                },
                {
                    field: 'bz',
                    title: '备注'
                },
                {
                    title: '操作',
                    align: 'center',
                    formatter: function(value, row, index) {
                        var actions = [];
                        actions.push('<a class="btn btn-success btn-xs ' + editFlag + '" href="javascript:void(0)" onclick="$.operate.edit(\'' + row.gdzcxxId + '\')"><i class="fa fa-edit"></i>编辑</a> ');
                        actions.push('<a class="btn btn-danger btn-xs ' + removeFlag + '" href="javascript:void(0)" onclick="$.operate.remove(\'' + row.gdzcxxId + '\')"><i class="fa fa-remove"></i>删除</a>');
                        actions.push('<a class="btn btn-success btn-xs ' + qrcodeFlag + '" href="javascript:void(0)" onclick="createQRCode(\'' + row.gdzcxxId + '\')"><i class="fa fa-edit"></i>生成二维码</a> ');
                        return actions.join('');
                    }
                }]
            };
            $.table.init(options);
        });
    </script>
</body>
</html>

二、后端

XML 复制代码

        <!--二维码-->
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.4.1</version>
        </dependency>

java 复制代码

@Controller
@RequestMapping("/biz/gdzcxx")
public class BizGdzcxxController extends BaseController
{
    private String prefix = "biz/gdzcxx";
    /**
     * 创建二维码
     */
    @RequiresPermissions("biz:gdzcxx:createQRCode")
    @PostMapping("/createQRCode")
    public String createQRCode(String gdzcxxid) throws IOException, WriterException {
        
        //根据ID取记录，并为其生成二维码
        BizGdzcxx bizGdzcxx = bizGdzcxxService.selectBizGdzcxxByGdzcxxId(Long.valueOf(gdzcxxid));

        QRCode qrCode = new QRCode();

        //二维码物理存放路径
        String uploadPath = "D:/qrcode";
        qrCode.setFilePath(uploadPath + "/ewm/gdzcxx/" + bizGdzcxx.getZcmc() + ".png");
        
        //二维码内容：http://localhost:8088/prefix/info/1
        qrCode.setQrCodeData("/" + prefix + "/info/" + bizGdzcxx.getGdzcxxId());
        
        //创建二维码
        qrCodeService.createQRCode(qrCode);

        //将二维码转二进制
        FileInputStream fis = new FileInputStream(qrCode.getFilePath());
        byte[] bytes = FileCopyUtils.copyToByteArray(fis);

        //二进制入库
        bizGdzcxx.setEwm(bytes);
        bizGdzcxxService.updateBizGdzcxx(bizGdzcxx);
        
        return prefix + "/gdzcewm";
    }

java 复制代码

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.chenf.biz.domain.QRCode;
import com.chenf.biz.service.IQRCodeService;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;

@Service
public class QRCodeServiceImpl implements IQRCodeService {
    @Override
    public void createQRCode(QRCode qrCode) throws IOException, WriterException {
        QRCodeWriter qrCodeWriter = new QRCodeWriter();

        Map<EncodeHintType, Object> hintMap = new HashMap<>();
        hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
        hintMap.put(EncodeHintType.CHARACTER_SET, qrCode.getCharset());

        BitMatrix matrix = qrCodeWriter.encode(new String(qrCode.getQrCodeData().getBytes(qrCode.getCharset()), qrCode.getCharset()),
        //BitMatrix matrix = qrCodeWriter.encode(qrCode.getQrCodeData(),
                BarcodeFormat.QR_CODE, qrCode.getQrCodeWidth(), qrCode.getQrCodeHeight(), hintMap);
        Path path = Paths.get(qrCode.getFilePath());
        if (!Files.exists(path)) {
            try {
                Files.createDirectories(path);
                System.out.println("Path created!");
            } catch (Exception e) {
                System.out.println("An error occurred while creating the path: " + e.getMessage());
            }
        } else {
            System.out.println("Path already exists!");
        }
        MatrixToImageWriter.writeToPath(matrix, qrCode.getFilePath().substring(qrCode.getFilePath().lastIndexOf('.') + 1), path);
    }
}

java 复制代码

import com.google.zxing.WriterException;
import com.chenf.biz.domain.QRCode;

import java.io.IOException;

public interface IQRCodeService {
    void createQRCode(QRCode qrCode) throws IOException, WriterException;
}

java 复制代码

/**
 * 二维码
 */
public class QRCode {
    //二维码内容
    private String qrCodeData;
    //二维码存放路径
    private String filePath;
    private String charset="UTF-8";
    //二维码调度
    private int qrCodeHeight=200;
    //二维码宽度
    private int qrCodeWidth=200;

    public String getQrCodeData(){return this.qrCodeData;}
    public void setQrCodeData(String qrCodeData){ this.qrCodeData = qrCodeData;}
    public String getFilePath(){return this.filePath;}
    public void setFilePath(String filePath){ this.filePath = filePath;}
    public String getCharset(){return this.charset;}
    public void setCharset(String charset){ this.charset = charset;}
    public int getQrCodeHeight(){return this.qrCodeHeight;}
    public void setQrCodeHeight(int qrCodeHeight){ this.qrCodeHeight = qrCodeHeight;}
    public int getQrCodeWidth(){return this.qrCodeWidth;}
    public void setQrCodeWidth(int qrCodeWidth){ this.qrCodeWidth = qrCodeWidth;}
}

《完结》