前端生成快递单PDF本文介绍了如何使用JavaScript创建一个在线快递单PDF生成器。可以直接在浏览器上生成PDF文

快递包装上一般都贴着快递单，通常包含以下信息：

发件人和收件人的详细信息（姓名、电话号码、地址）
快递单号
用于使用机器读取信息的条码

国际上快递单的尺寸一般是为4x6英寸（10x15厘米）。

快递单示例：

在本文中，我们将编写一个在线快递单PDF生成器。可以在任何具有浏览器功能的设备上执行此操作。

我们将使用两个库：

Dynamsoft Document Viewer：绘制文本和图形并输出PDF文件。需要许可证才能使用它。可以在这里申请一个证书。
bwip-js：用于生成条码。

在线demo

新建HTML文件

创建一个包含以下模板的新HTML文件。

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Rotate an Image with JavaScript</title>
  <style>
  h2 {
    text-align: center;
  }

  #app {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  </style>
</head>
<body>
  <div id="app">
    <h2>Online Shipping Label Generator</h2>
  </div>
  <script></script>
</body>
</html>

添加依赖项

在head中包含第三方库：

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/bwip-js/dist/bwip-js-min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/dynamsoft-document-viewer@latest/dist/ddv.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/dynamsoft-document-viewer@latest/dist/ddv.css">

布局设计

创建一个用于输入详细信息的表单。在表单底部，添加用于生成快递单的按钮，并添加用于填写预设模板内容的按钮。在表单下方，将生成的标签显示在Dynamsoft Document Viewer的Edit Viewer中。我们可以查看文档图像、将图像下载为PDF文件并打印文档。

代码：

<style>
h2 {
  text-align: center;
}

#app {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.form {
  display: flex;
  flex-direction: column;
  width: 80%;
  border: 1px solid lightgray;
  border-radius: 5px;
}

.section {
  padding: 5px 20px;
  width: 100%;
}

#container {
  margin-top: 20px;
  width: 80%;
  height: 480px;
}
<style/>
<div id="app">
  <h2>Online Shipping Label Generator</h2>
  <div class="form">
    <div class="section">
      <h3>Sender:</h3>
      <div>
        <label for="senderName">
          Name: <input id="senderName" type="text"/>
        </label>
      </div>
      <div>
        <label for="senderPhone">
          Phone: <input id="senderPhone" type="text"/>
        </label>
      </div>
      <div>
        <label for="senderAddressLineOne">
          Address line 1: <input id="senderAddressLineOne" type="text"/>
        </label>
      </div>
      <div>
        <label for="senderAddressLineTwo">
          Address line 2: <input id="senderAddressLineTwo" type="text"/>
        </label>
      </div>
      <div>
        <label for="senderCity">
          City: <input id="senderCity" type="text"/>
        </label>
      </div>
      <div>
        <label for="senderState">
          State/Province: <input id="senderState" type="text"/>
        </label>
      </div>
      <div>
        <label for="senderPostalCode">
          Postal code: <input id="senderPostalCode" type="text"/>
        </label>
      </div>
    </div>
    <div class="section">
      <h3>To:</h3>
      <div>
        <label for="receiverName">
          Name: <input id="receiverName" type="text"/>
        </label>
      </div>
      <div>
        <label for="receiverPhone">
          Phone: <input id="receiverPhone" type="text"/>
        </label>
      </div>
      <div>
        <label for="receiverAddressLineOne">
          Address line 1: <input id="receiverAddressLineOne" type="text"/>
        </label>
      </div>
      <div>
        <label for="receiverAddressLineTwo">
          Address line 2: <input id="receiverAddressLineTwo" type="text"/>
        </label>
      </div>
      <div>
        <label for="receiverCity">
          City: <input id="receiverCity" type="text"/>
        </label>
      </div>
      <div>
        <label for="receiverState">
          State/Province: <input id="receiverState" type="text"/>
        </label>
      </div>
      <div>
        <label for="receiverPostalCode">
          Postal code: <input id="receiverPostalCode" type="text"/>
        </label>
      </div>
    </div>
    <div class="section">
      <h3>Other:</h3>
      <label for="packageNumber">
        Package Number: <input id="packageNumber" type="text"/>
      </label>
    </div>
    <div class="section">
      <div>
        <button onclick="generate()">Generate</button>
        <button onclick="fillInTemplate()">Fill in template</button>
      </div>
    </div>
  </div>
  <div class="barcodes" style="display: none;">
    <div id="code128"><canvas id="code128CVS"></canvas></div>
    <div id="qrcode"><canvas id="qrcodeCVS"></canvas></div>
  </div>
  <div id="container"></div>
</div>

生成快递单标签

接下来，让我们使用JavaScript生成快递单标签。

初始化Dynamsoft Document Viewer

使用许可证初始化Dynamsoft Document Viewer。可以在这里申请一个证书。

async function initDDV(){
  Dynamsoft.DDV.Core.license = "DLS2eyJoYW5kc2hha2VDb2RlIjoiMjAwMDAxLTE2NDk4Mjk3OTI2MzUiLCJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSIsInNlc3Npb25QYXNzd29yZCI6IndTcGR6Vm05WDJrcEQ5YUoifQ=="; // Public trial license which is valid for 24 hours
  Dynamsoft.DDV.Core.engineResourcePath = "https://cdn.jsdelivr.net/npm/dynamsoft-document-viewer@latest/dist/engine";// Lead to a folder containing the distributed WASM files
  await Dynamsoft.DDV.Core.loadWasm();
  await Dynamsoft.DDV.Core.init();
}

创建一个新的Edit Viewer的实例和一个文档实例。将Edit Viewer与文档和div容器绑定。

function initEditViewer(){
  // Configure image filter feature
  Dynamsoft.DDV.setProcessingHandler("imageFilter", new Dynamsoft.DDV.ImageFilter());
  // Create an edit viewer
  editViewer = new Dynamsoft.DDV.EditViewer({
    container: "container",
    uiConfig: Dynamsoft.DDV.getDefaultUiConfig("editViewer", {includeAnnotationSet: true}),
  });
  const docManager = Dynamsoft.DDV.documentManager;
  doc = docManager.createDocument();
  editViewer.openDocument(doc.uid);
}

生成条码

使用bwip-js生成条码供之后使用。

生成一个Code128格式的条码以表示快递单号。

let code128CVS = bwipjs.toCanvas("code128CVS",{
  bcid:        'code128',       // Barcode type
  text:        document.getElementById("packageNumber").value,    // Text to encode
  scale:       5,
  height:      12,              // Bar height, in millimeters
  includetext: true,            // Show human-readable text
  textxalign:  'center',        // Always good to set this
  textcolor:   '000000',        // Black text
});

生成一个QR二维码以存储额外信息。
```
let text = JSON.stringify(getDataFor2D(),null,0);
let qrcodeCVS = bwipjs.toCanvas("qrcodeCVS",{
  bcid:        'qrcode',       // Barcode type
  text:        text,    // Text to encode
  scale:       5
});

function getDataFor2D(){
  let data = {
    "senderName": document.getElementById("senderName").value,
    "receiverName": document.getElementById("receiverName").value,
    "packageNumber": document.getElementById("packageNumber").value
  }
  return data;
}
```
快递单还常用到其它格式的二维码：
- Maxicode：MaxiCode由美国UPS公司于 1992年创建，用于跟踪和管理包裹的运输。它通常包含有关包裹的结构化承运人消息。
- Aztec：与其他矩阵型条码相比，Aztec码周围不需要空白 "静区"，因此可以节省空间。Aztec代码广泛用于交通票务。
- PDF417：PDF417是一种堆叠式条形码，可以通过简单的线性扫描进行读取，而其他2D代码则需要图像传感器。
在这里，我们使用QR二维码作为示例。

绘制文本和图形

Dynamsoft Document Viewer提供的标注功能，允许我们绘制文本和图形。我们将使用它来绘制快递单。

使用Canvas创建A4大小的文档页面，并将其加载到Dynamsoft Document Viewer。

let canvas = document.createElement("canvas");
canvas.width = 2480; //pixels of A4 size in 300 DPI
canvas.height = 3508;
let context = canvas.getContext('2d');
context.fillStyle = 'rgb(255,255,255)';
context.fillRect(0,0,canvas.width,canvas.height);
canvas.toBlob(async (blob) => {
  await doc.loadSource(blob);
});

绘制一个快递单大小的矩形。

const pageUid = editViewer.indexToUid(doc.pages.length - 1);
let width = 900; // 4 inches -> 900 points in 72 DPI
let height = 1350; // 6 inches -> 1350 points in 72 DPI
let margin = 50; //margin to the A4 page
const options = {
  x: margin,
  y: margin,
  width: width,
  height: height,
  borderWidth: 5,
  borderColor: "black",
  background: "transparent"
}
const rect = Dynamsoft.DDV.annotationManager.createAnnotation(pageUid, "rectangle",options);

绘制二维码。

const qrBlob = await getBarcodeImageBlob("qrcodeCVS");
const qrStampOptions = {
  x: 90,
  y: 90,
  width: 200,
  height: 200,
  stamp: qrBlob
}
const qrStamp = await Dynamsoft.DDV.annotationManager.createAnnotation(pageUid, "stamp", qrStampOptions);

function getBarcodeImageBlob(id){
  return new Promise((resolve, reject) => {
    let canvas = document.getElementById(id);
    canvas.toBlob(async (blob) => {
      resolve(blob)
    });
  })
}

绘制在二维码和发件人信息之间的线。

const firstLineOptions = {
  startPoint: {x:margin, y:340},
  endPoint: {x:width+margin, y:340},
  borderWidth: 2,
  borderColor: "black",
  background: "black"
}
const firstline = await Dynamsoft.DDV.annotationManager.createAnnotation(pageUid, "line", firstLineOptions);

使用文本框绘制发件人的信息。

const senderTextBoxOptions = {
  x: 90,
  y: 400,
  width: 600,
  height: 150,
  textAlign: "left",
  borderWidth: 0,
  textContents: getSenderText()
};
const senderTextBox = await Dynamsoft.DDV.annotationManager.createAnnotation(pageUid, "textBox", senderTextBoxOptions);

function getSenderText(){
  let text = document.getElementById("senderName").value + "\n";
  text = text + document.getElementById("senderPhone").value + "\n";
  text = text + document.getElementById("senderAddressLineOne").value + "\n";
  if (document.getElementById("senderAddressLineTwo").value) {
    text = text + document.getElementById("senderAddressLineTwo").value + "\n";
  }
  text = text + document.getElementById("senderCity").value + ", " + document.getElementById("senderState").value + " " + document.getElementById("senderPostalCode").value;
  return [{content: text, fontSize: 22}]
}

使用文本框绘制收件人的信息，并在文本框前面加上"To:"（收件人）。

const toTextBoxOptions = {
  x: 90,
  y: 640,
  width: 50,
  height: 150,
  textAlign: "left",
  borderWidth: 0,
  textContents: [{"content":"To:","fontWeight":"bold","fontSize":24}]
}
const toTextBox = await Dynamsoft.DDV.annotationManager.createAnnotation(pageUid, "textBox", toTextBoxOptions);
const receiverTextBoxOptions = {
  x: 140,
  y: 640,
  width: 600,
  height: 150,
  textAlign: "left",
  borderWidth: 0,
  textContents: getReceiverText()
};
const receiverTextBox = await Dynamsoft.DDV.annotationManager.createAnnotation(pageUid, "textBox", receiverTextBoxOptions);
function getReceiverText(){
  let text = document.getElementById("receiverName").value + "\n";
  text = text + document.getElementById("receiverPhone").value + "\n";
  text = text + document.getElementById("receiverAddressLineOne").value + "\n";
  if (document.getElementById("receiverAddressLineTwo").value) {
    text = text + document.getElementById("receiverAddressLineTwo").value + "\n";
  }
  text = text + document.getElementById("receiverCity").value + ", " + document.getElementById("receiverState").value + " " + document.getElementById("receiverPostalCode").value;
  return [{content: text, fontSize: 22}]
}

绘制在收件人信息和包裹编号条码之间的线。

const secondLineOptions = {
  startPoint: {x:margin, y:870},
  endPoint: {x:width+margin, y:870},
  borderWidth: 2,
  borderColor: "black",
  background: "black"
}
const secondline = await Dynamsoft.DDV.annotationManager.createAnnotation(pageUid, "line", secondLineOptions);

绘制表示快递单号的Code128条码。

const barcodeBlob = await getBarcodeImageBlob("code128CVS");
const code128Canvas = document.getElementById("code128CVS");
const barcodeWidth = width*0.7
const barcodeHeight = code128Canvas.height/(code128Canvas.width/barcodeWidth);
const barcodeStampOptions = {
  x: 90,
  y: 940,
  width: barcodeWidth,
  height: barcodeHeight,
  stamp: barcodeBlob
}
const barcodeStamp = await Dynamsoft.DDV.annotationManager.createAnnotation(pageUid, "stamp", barcodeStampOptions);

将快递单保存为PDF

我们可以使用文档实例的saveToPdf函数将快递单保存为PDF文件。

const pdfSettings = {
  saveAnnotation: "annotation"
};
const blob = await doc.saveToPdf(pdfSettings);

打印快递单

我们也可以使用文档实例的print函数直接打印它。

doc.print({
  printAnnotation: true
});

源代码

查看demo的源代码并尝试使用：

github.com/tony-xlh/sh…