js中LOPOD如何打印pdf base64文件
时间: 2024-03-02 15:53:17 浏览: 133
您可以使用jsPDF和FileSaver库来打印pdf base64文件。以下是一个示例代码:
```javascript
// 将base64编码的pdf文件转换为二进制数据
function base64ToBlob(base64Data, contentType) {
contentType = contentType || '';
var sliceSize = 1024;
var byteCharacters = atob(base64Data);
var bytesLength = byteCharacters.length;
var slicesCount = Math.ceil(bytesLength / sliceSize);
var byteArrays = new Array(slicesCount);
for (var sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
var begin = sliceIndex * sliceSize;
var end = Math.min(begin + sliceSize, bytesLength);
var bytes = new Array(end - begin);
for (var offset = begin, i = 0; offset < end; ++i, ++offset) {
bytes[i] = byteCharacters[offset].charCodeAt(0);
}
byteArrays[sliceIndex] = new Uint8Array(bytes);
}
return new Blob(byteArrays, { type: contentType });
}
// 打印pdf base64文件
function printPdfBase64(base64Data) {
var pdfBlob = base64ToBlob(base64Data, 'application/pdf');
var blobUrl = URL.createObjectURL(pdfBlob);
var iframe = document.createElement('iframe');
iframe.style.display = 'none';
iframe.src = blobUrl;
document.body.appendChild(iframe);
iframe.contentWindow.print();
}
// 示例用法
var base64Data = 'Base64编码的PDF文件内容';
printPdfBase64(base64Data);
```
注意:您需要替换示例代码中的`base64Data`变量,以便它包含您要打印的pdf文件的实际内容。
阅读全文