使用C++通过JavaScript将JSON转换为CSV
Contents
[
Hide
]
将JSON转换为CSV
Aspose.Cells for JavaScript通过C++支持将简单和嵌套的JSON转换为CSV。为此，API提供JsonLayoutOptions和JsonUtility类。JsonLayoutOptions类提供JSON布局的选项，如JsonLayoutOptions.arrayAsTable（将数组作为表处理）。JsonUtility类使用JsonLayoutOptions类设置的布局选项处理JSON。
以下代码示例演示了如何使用 JsonLayoutOptions 和 JsonUtility 类加载 源 JSON 文件，并生成 输出 CSV 文件。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells JSON to CSV Example</title>
</head>
<body>
<h1>Import JSON to CSV Example</h1>
<input type="file" id="fileInput" accept=".json" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, JsonLayoutOptions, JsonUtility, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
const resultDiv = document.getElementById('result');
if (!fileInput.files.length) {
resultDiv.innerHTML = '<p style="color: red;">Please select a JSON file.</p>';
return;
}
const file = fileInput.files[0];
const jsonText = await file.text();
// Create empty workbook
const workbook = new Workbook();
// Get Cells from first worksheet
const cells = workbook.worksheets.get(0).cells;
// Set JsonLayoutOptions
const importOptions = new JsonLayoutOptions();
importOptions.convertNumericOrDate = true;
importOptions.arrayAsTable = true;
importOptions.ignoreTitle = true;
// Import JSON data into worksheet cells starting at A1 (0,0)
JsonUtility.importData(jsonText, cells, 0, 0, importOptions);
// Save Workbook as CSV
const outputData = workbook.save(SaveFormat.Csv);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'SampleJson_out.csv';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download CSV File';
resultDiv.innerHTML = '<p style="color: green;">JSON imported and CSV prepared. Click the download link to get the CSV file.</p>';
});
</script>
</html>