Vue生成多文件pdf准考证

news2024/12/24 22:10:10

这是渲染的数据

在这里插入图片描述

这是生成的pdf文件，直接可以打印

在这里插入图片描述

需要安装和npm依赖和引入封装的pdf.js文件

npm install --save html2canvas  // 页面转图片
npm install jspdf --save  // 图片转pdf

pdf.js文件

import html2canvas from "html2canvas";
import jsPDF from "jspdf";
// 为传的pdf名称动态fileName
export const downloadPDF = (page, fileName) => {
    html2canvas(page).then(function (canvas) {
        canvas2PDF(canvas, fileName);
    });
};
const canvas2PDF = (canvas, fileName) => {
    let contentWidth = canvas.width;
    let contentHeight = canvas.height;

    //a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高
    let imgWidth = 595.28;
    let imgHeight = 595.28 / contentWidth * contentHeight;
    // 第一个参数： l：横向  p：纵向
    // 第二个参数：测量单位（"pt"，"mm", "cm", "m", "in" or "px"）
    let pdf = new jsPDF("p", "pt");
    pdf.addImage(
        canvas.toDataURL("image/jpeg", 1.0),
        "JPEG",
        0,
        0,
        imgWidth,
        imgHeight
    );

    pdf.save(fileName + ".pdf");
};

具体实现

Tempalte

<template>   
	<div> 
    <div v-for="(item, index) in listDatas" :key="index">
      <div class="boss">
        <div class="box" :ref="`pdf-${index}`">
          <div class="box_son">
            <div class="titles">"XXX"竞赛</div>
            <div class="zhunasd">准考证</div>
            <div class="once">
              <div class="contents">
                <div>姓名: &nbsp;{{ item.name }}</div>
                <div>考号: &nbsp;{{ item.kaohao }}</div>
                <div>司职: &nbsp;{{ item.gongzhongTitle }}</div>
              </div>

              <div class="photos">
                <img :src="item.sfzhimgs" alt="" width="100%" height="150px" />
              </div>
            </div>

            <table
              border="1px solid #2D2822"
              cellpadding="0"
              cellspacing="0"
              class="tables"
            >
              <tr>
                <td style="width: 250px; border: 1px solid #2d2822">
                  &nbsp;考试类别
                </td>

                <td style="width: 180px; border: 1px solid #2d2822">
                  &nbsp;序号
                </td>
              </tr>

              <tr>
                <td style="width: 250px; border: 1px solid #2d2822">
                  &nbsp;理论测试
                </td>
                <td style="width: 180px; border: 1px solid #2d2822">
                  &nbsp;{{ item.liLunZw }}
                </td>
              </tr>

              <tr>
                <td
                  style="width: 250px; border: 1px solid #2d2822"
                  v-if="item.fangzhen[1] != undefined"
                >
                  &nbsp;{{ item.fangzhen[0] }}
                </td>
                <td
                  style="width: 180px; border: 1px solid #2d2822"
                  v-if="item.uuid[1] != undefined"
                >
                  &nbsp;{{ item.uuid[0] }}
                </td>
              </tr>
              <tr>
                <td
                  style="width: 250px; border: 1px solid #2d2822"
                  v-if="item.fangzhen[1] != undefined"
                >
                  &nbsp;{{ item.fangzhen[1] }}
                </td>
                <td
                  style="width: 180px; border: 1px solid #2d2822"
                  v-if="item.uuid[1] != undefined"
                >
                  &nbsp;{{ item.uuid[1] }}
                </td>
              </tr>
              <tr>
                <td
                  style="width: 250px; border: 1px solid #2d2822"
                  v-if="item.fangzhen[2] != undefined"
                >
                  &nbsp;{{ item.fangzhen[2] }}
                </td>
                <td
                  style="width: 180px; border: 1px solid #2d2822"
                  v-if="item.uuid[2] != undefined"
                >
                  &nbsp;{{ item.uuid[2] }}
                </td>
              </tr>
              <tr>
                <td
                  style="width: 250px; border: 1px solid #2d2822"
                  v-if="item.fangzhen[3] != undefined"
                >
                  &nbsp;{{ item.fangzhen[3] }}
                </td>
                <td
                  style="width: 180px; border: 1px solid #2d2822"
                  v-if="item.uuid[3] != undefined"
                >
                  &nbsp;{{ item.uuid[3] }}
                </td>
              </tr>
            </table>

            <div class="footers">
              <div>注意事项:</div>

              <div class="footers_one">
                1、考生凭准考证和身份证进入考场,对号入座,并将准考证、<br />
                <div class="footers_two">身份证放在桌面上</div>
              </div>
              <div class="footers_two">
                2、准考证如有涂改或者损坏严重情况,将视为无效证件。
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
    <button @click="handleExport">导出PDF</button>

</div>
</template>

Script

1.转换为base64的图片才能生效 http和https的图片生成都不生效

2.这里用到的是Google Chrome浏览器多文件下载一次最多只有10个，这里我们有做异步处理延迟1秒下载

<script>

import { downloadPDF } from "../utils/pdf"; //创建一个utils文件夹 下放封装的pdf
export default {
  data() {
    return {
      listDatas: [
        {
          kaohao: "2100",
          liLunZw: "D106",
          sfzh: "2110",
          name: "Stephen Curry",
          uuid: ["GS01", "GA02", "GF03"],
          gongzhongTitle: "后卫",
          fangzhen: ["运球训练", "投篮训练", "上篮训练"],
          sfzhimgs: "转换为base64的图片才能生效 http和https的图片生成都不生效",
        },
        {
          kaohao: "2100",
          liLunZw: "D107",
          sfzh: "2110",
          name: "Andrew Wiggins",
          uuid: ["GS01", "GA02", "GF03"],
          gongzhongTitle: "小前锋",
          fangzhen: ["运球训练", "投篮训练", "上篮训练"],
          sfzhimgs: "",
        },
        {
          kaohao: "2100",
          liLunZw: "D107",
          sfzh: "2110",
          name: "Andrew Wiggins",
          uuid: ["GS01", "GA02", "GF03"],
          gongzhongTitle: "小前锋",
          fangzhen: ["运球训练", "投篮训练", "上篮训练"],
          sfzhimgs: "",
        },
        {
          kaohao: "2100",
          liLunZw: "D107",
          sfzh: "2110",
          name: "Andrew Wiggins",
          uuid: ["GS01", "GA02", "GF03"],
          gongzhongTitle: "小前锋",
          fangzhen: ["运球训练", "投篮训练", "上篮训练"],
          sfzhimgs: "",
        },
      ],
    };
  },

  methods: {
    // 导出pdf
    handleExport() {
      this.downloadPDFs();
    },
    // 异步执行下载pdf
    async downloadPDFs() {
      const downloadPromises = [];
      for (let index = 0; index < this.listDatas.length; index++) {
        const item = this.listDatas[index].name; //获取名称
        const pdfElement = this.$refs[`pdf-${index}`][0]; //获取pdf内容循环
        var content = pdfElement.textContent; //获取文本内容
        const startIndex = content.indexOf("考号:") + 4; //截取考号为pdf的名称
        const endIndex = content.indexOf("工种:");
        const examNumber = content.substring(startIndex, endIndex).trim(); //pdf的名字
        const ZhongName = item + "," + examNumber; //名称+考号为pdf名称
        await this.delay(1000); // 延迟1秒
        const downloadPromise = downloadPDF(pdfElement, ZhongName); //获取打印pdf的内容

        downloadPromises.push(downloadPromise);
      }
      Promise.all(downloadPromises)
        .then(() => {
          // 全部下载完成后执行的代码
          console.log("全部下载完成");
        })
        .catch((error) => {
          // 处理下载错误
          console.error("下载出错", error);
        });
    },
    delay(ms) {
      return new Promise((resolve) => setTimeout(resolve, ms));
    },
  },
};
</script>

Style

<style>
.boss {
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  overflow: hidden;
}
.box {
  width: 480px;
  height: 760px;
  // border: 1px solid #000;
  display: flex;
  justify-content: center;
  // margin-top: 50px;
}
.box_son {
  width: 425px;
  height: 600px;
  margin-top: 30px;
  // border: 1px solid yellow;
}
.titles {
  font-size: 20px;
  font-weight: 800;
  display: flex;
  justify-content: center;
  margin-top: 10px;
}
.zhunasd {
  font-size: 20px;
  font-family: Microsoft YaHei;
  font-weight: 800;
  text-align: center;
}
.once {
  width: 100%;
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
  font-size: 17px;
  font-family: Microsoft YaHei;
  font-weight: 500;
  // border: 1px solid #000;
}
.contents {
  width: 70%;
  height: 160px;
  // border: 1px solid red;
  line-height: 56px;
}
.photos {
  width: 30%;
  height: 160px;
  // border: 1px solid blue;
}
.tables {
  width: 425px;
  margin-top: 20px;
  height: 180px;
}
.footers {
  margin-top: 20px;
}
.footers_one {
  margin-top: 10px;
}
.footers_two {
  margin-top: 10px;
}
</style>