• 为数据列表的每条记录生成对应的二维码

    效果图：

    一、前端

    1. html>
    2. <html lang="zh" xmlns:th="http://www.thymeleaf.org" xmlns:shiro="http://www.pollix.at/thymeleaf/shiro">
    3. <head>
    4.     <th:block th:include="include :: header('固定资产信息列表')" />
    5. head>
    6. <body class="gray-bg">
    7.      <div class="container-div">
    8.         <div class="row">
    9.             <div class="col-sm-12 search-collapse">
    10.                 <form id="formId">
    11.                     <div class="select-list">
    12.                         <ul>
    13.                             <li>
    14.                                 <label>资产名称：label>
    15.                                 <input type="text" name="zcmc"/>
    16.                             li>
    17.                             <li>
    18.                                 <label>资产型号：label>
    19.                                 <input type="text" name="zcxh"/>
    20.                             li>
    21.                             <li>
    22.                                 <a class="btn btn-primary btn-rounded btn-sm" onclick="$.table.search()"><i class="fa fa-search">i> 搜索a>
    23.                                 <a class="btn btn-warning btn-rounded btn-sm" onclick="$.form.reset()"><i class="fa fa-refresh">i> 重置a>
    24.                             li>
    25.                         ul>
    26.                     div>
    27.                 form>
    28.             div>
    29.  
    30.             <div class="btn-group-sm" id="toolbar" role="group">
    31.                 <a class="btn btn-success" onclick="$.operate.add()" shiro:hasPermission="biz:gdzcxx:add">
    32.                     <i class="fa fa-plus">i> 添加
    33.                 a>
    34.                 <a class="btn btn-primary single disabled" onclick="$.operate.edit()" shiro:hasPermission="biz:gdzcxx:edit">
    35.                     <i class="fa fa-edit">i> 修改
    36.                 a>
    37.                 <a class="btn btn-danger multiple disabled" onclick="$.operate.removeAll()" shiro:hasPermission="biz:gdzcxx:remove">
    38.                     <i class="fa fa-remove">i> 删除
    39.                 a>
    40.                 <a class="btn btn-warning" onclick="$.table.exportExcel()" shiro:hasPermission="biz:gdzcxx:export">
    41.                     <i class="fa fa-download">i> 导出
    42.                 a>
    43.             div>
    44.             <div class="col-sm-12 select-table table-striped">
    45.                 <table id="bootstrap-table">table>
    46.             div>
    47.         div>
    48.     div>
    49.     <th:block th:include="include :: footer" />
    50.     <script th:inline="javascript">
    51.         var qrcodeFlag = [[${@permission.hasPermi('biz:gdzcxx:createQRCode')}]];
    52.         var editFlag = [[${@permission.hasPermi('biz:gdzcxx:edit')}]];
    53.         var removeFlag = [[${@permission.hasPermi('biz:gdzcxx:remove')}]];
    54.         var prefix = ctx + "biz/gdzcxx";
    55.  
    56.         //生成二维码
    57.         function createQRCode(id){
    58.             $.ajax({
    59.                 url: prefix + "/createQRCode",
    60.                 data: {gdzcxxid:id},
    61.                 type: 'POST',
    62.                 success: function (result) {
    63.                     $.table.refresh();
    64.                 }
    65.             });
    66.         }
    67.         $(function() {
    68.             var options = {
    69.                 url: prefix + "/list",
    70.                 createUrl: prefix + "/add",
    71.                 updateUrl: prefix + "/edit/{id}",
    72.                 removeUrl: prefix + "/remove",
    73.                 exportUrl: prefix + "/export",
    74.                 modalName: "固定资产信息",
    75.                 columns: [{
    76.                     checkbox: true
    77.                 },
    78.                 {
    79.                     field: 'gdzcxxId',
    80.                     title: '资产ID'
    81.                 },
    82.                 {
    83.                     field: 'zcmc',
    84.                     title: '资产名称'
    85.                 },
    86.                 {
    87.                     field: 'zcxh',
    88.                     title: '资产型号'
    89.                 },
    90.                 {
    91.                     field: 'ewm',
    92.                     title: '二维码',
    93.                     formatter:function(value, row, index){
    94.                         var imageDataUrl = 'data:image/png;base64,' + value;
    95.                         return "";
    96.                     }
    97.                 },
    98.                 {
    99.                     field: 'bz',
    100.                     title: '备注'
    101.                 },
    102.                 {
    103.                     title: '操作',
    104.                     align: 'center',
    105.                     formatter: function(value, row, index) {
    106.                         var actions = [];
    107.                         actions.push(''" href="javascript:void(0)" onclick="$.operate.edit(\'' + row.gdzcxxId + '\')">编辑 ');
    108.                         actions.push(''" href="javascript:void(0)" onclick="$.operate.remove(\'' + row.gdzcxxId + '\')">删除');
    109.                         actions.push(''" href="javascript:void(0)" onclick="createQRCode(\'' + row.gdzcxxId + '\')">生成二维码 ');
    110.                         return actions.join('');
    111.                     }
    112.                 }]
    113.             };
    114.             $.table.init(options);
    115.         });
    116.     script>
    117. body>
    118. html>

    二、后端

    1.  
    2.         
    3.         <dependency>
    4.             <groupId>com.google.zxinggroupId>
    5.             <artifactId>coreartifactId>
    6.             <version>3.4.1version>
    7.         dependency>
    8.         <dependency>
    9.             <groupId>com.google.zxinggroupId>
    10.             <artifactId>javaseartifactId>
    11.             <version>3.4.1version>
    12.         dependency>
    1. @Controller
    2. @RequestMapping("/biz/gdzcxx")
    3. public class BizGdzcxxController extends BaseController
    4. {
    5.     private String prefix = "biz/gdzcxx";
    6.     /**
    7.      * 创建二维码
    8.      */
    9.     @RequiresPermissions("biz:gdzcxx:createQRCode")
    10.     @PostMapping("/createQRCode")
    11.     public String createQRCode(String gdzcxxid) throws IOException, WriterException {
    12.         
    13.         //根据ID取记录，并为其生成二维码
    14.         BizGdzcxx bizGdzcxx = bizGdzcxxService.selectBizGdzcxxByGdzcxxId(Long.valueOf(gdzcxxid));
    15.  
    16.         QRCode qrCode = new QRCode();
    17.  
    18.         //二维码物理存放路径
    19.         String uploadPath = "D:/qrcode";
    20.         qrCode.setFilePath(uploadPath + "/ewm/gdzcxx/" + bizGdzcxx.getZcmc() + ".png");
    21.         
    22.         //二维码内容：http://localhost:8088/prefix/info/1
    23.         qrCode.setQrCodeData("/" + prefix + "/info/" + bizGdzcxx.getGdzcxxId());
    24.         
    25.         //创建二维码
    26.         qrCodeService.createQRCode(qrCode);
    27.  
    28.         //将二维码转二进制
    29.         FileInputStream fis = new FileInputStream(qrCode.getFilePath());
    30.         byte[] bytes = FileCopyUtils.copyToByteArray(fis);
    31.  
    32.         //二进制入库
    33.         bizGdzcxx.setEwm(bytes);
    34.         bizGdzcxxService.updateBizGdzcxx(bizGdzcxx);
    35.         
    36.         return prefix + "/gdzcewm";
    37.     }
    1.  
    2. import com.google.zxing.BarcodeFormat;
    3. import com.google.zxing.EncodeHintType;
    4. import com.google.zxing.WriterException;
    5. import com.google.zxing.client.j2se.MatrixToImageWriter;
    6. import com.google.zxing.common.BitMatrix;
    7. import com.google.zxing.qrcode.QRCodeWriter;
    8. import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
    9. import com.chenf.biz.domain.QRCode;
    10. import com.chenf.biz.service.IQRCodeService;
    11. import org.springframework.stereotype.Service;
    12.  
    13. import java.io.IOException;
    14. import java.nio.file.Files;
    15. import java.nio.file.Path;
    16. import java.nio.file.Paths;
    17. import java.util.HashMap;
    18. import java.util.Map;
    19.  
    20. @Service
    21. public class QRCodeServiceImpl implements IQRCodeService {
    22.     @Override
    23.     public void createQRCode(QRCode qrCode) throws IOException, WriterException {
    24.         QRCodeWriter qrCodeWriter = new QRCodeWriter();
    25.  
    26.         Map hintMap = new HashMap<>();
    27.         hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
    28.         hintMap.put(EncodeHintType.CHARACTER_SET, qrCode.getCharset());
    29.  
    30.         BitMatrix matrix = qrCodeWriter.encode(new String(qrCode.getQrCodeData().getBytes(qrCode.getCharset()), qrCode.getCharset()),
    31.         //BitMatrix matrix = qrCodeWriter.encode(qrCode.getQrCodeData(),
    32.                 BarcodeFormat.QR_CODE, qrCode.getQrCodeWidth(), qrCode.getQrCodeHeight(), hintMap);
    33.         Path path = Paths.get(qrCode.getFilePath());
    34.         if (!Files.exists(path)) {
    35.             try {
    36.                 Files.createDirectories(path);
    37.                 System.out.println("Path created!");
    38.             } catch (Exception e) {
    39.                 System.out.println("An error occurred while creating the path: " + e.getMessage());
    40.             }
    41.         } else {
    42.             System.out.println("Path already exists!");
    43.         }
    44.         MatrixToImageWriter.writeToPath(matrix, qrCode.getFilePath().substring(qrCode.getFilePath().lastIndexOf('.') + 1), path);
    45.     }
    46. }
    1. import com.google.zxing.WriterException;
    2. import com.chenf.biz.domain.QRCode;
    3.  
    4. import java.io.IOException;
    5.  
    6. public interface IQRCodeService {
    7.     void createQRCode(QRCode qrCode) throws IOException, WriterException;
    8. }
    1.  
    2. /**
    3.  * 二维码
    4.  */
    5. public class QRCode {
    6.     //二维码内容
    7.     private String qrCodeData;
    8.     //二维码存放路径
    9.     private String filePath;
    10.     private String charset="UTF-8";
    11.     //二维码调度
    12.     private int qrCodeHeight=200;
    13.     //二维码宽度
    14.     private int qrCodeWidth=200;
    15.  
    16.     public String getQrCodeData(){return this.qrCodeData;}
    17.     public void setQrCodeData(String qrCodeData){ this.qrCodeData = qrCodeData;}
    18.     public String getFilePath(){return this.filePath;}
    19.     public void setFilePath(String filePath){ this.filePath = filePath;}
    20.     public String getCharset(){return this.charset;}
    21.     public void setCharset(String charset){ this.charset = charset;}
    22.     public int getQrCodeHeight(){return this.qrCodeHeight;}
    23.     public void setQrCodeHeight(int qrCodeHeight){ this.qrCodeHeight = qrCodeHeight;}
    24.     public int getQrCodeWidth(){return this.qrCodeWidth;}
    25.     public void setQrCodeWidth(int qrCodeWidth){ this.qrCodeWidth = qrCodeWidth;}
    26. }

    《完结》

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  • 原文地址：https://blog.csdn.net/yetyrain/article/details/133828805