这取决于你是如何呈现的CSV/XLSX文件。
在CSV中,如果您在NotePad中打开文档,显然您将看不到图像。记事本不会渲染图像,只是文字。正如其他人所说,你可以使用node-base64-image和jQuery-CSV它写在base64
字符串到CSV,因为这样的:
import {encode, decode} from 'node-base64-image'; // ES6
// Get the image as base64 string
var base64string = encode("path/to/img");
// Create an arrays object, to convert to CSV
// Note this is an array of arrays. E.g.,
// For an array:
// array = [ "a", "b", "c" ],
// you get the third element by doing:
// array[2] (= "c")
//
// So, for an array of arrays, i.e., 3 arrays containing 3 elements each:
// arrayOfArrays = [ [ "a", "b", "c" ],[ "d", "e", "f" ], [ "g", "h", "i" ] ]
// you get the third element by doing (as above):
// array[2] (= [ "g", "h", "i" ])
// and the third element of the selected array by doing:
// array[2][2] (= "i")
var csvArrays = [
[ "Image Name", "Image base64 Data" ], // Example titles row
[ "name-for-image", base64string ], // Example data row
];
// Convert arrays to CSV
var csvData = $.csv.fromArrays(csvArrays);
// Write the file!
fs.writeFile('csvFile.csv', csvData, (err) => {
if (err) throw err;
console.log('It\'s saved!');
});
编辑:然后将其从CSV文件进行解码,我们可以得到我们的CSV文件,我们之前保存的:
import {encode, decode} from 'node-base64-image'; // ES6
var csvFile = fs.readFile('csvFile.csv');
var csvDataAsArrays = $.csv.toArrays(csvFile);
// Get the second array from the group of arrays, then the second element from that array, hence `[1][1]`
var csvImgAsBase64 = csvDataAsArrays[1][1];
var imgAsData = decode(csvImgAsBase64);
fs.writeFile("img.jpeg", imgData, function() {
if (err) throw err;
console.log('It\'s saved!');
}
在XLSX中,您可以随意插入图像,然后在Excel中打开工作簿以查看图像。下面是如何使用Excel for Node包来完成:
ws.addImage({
path: './screenshot2.jpeg',
type: 'picture',
position: {
type: 'absoluteAnchor',
x: '1in',
y: '2in'
}
});
您还可以将其定位相对于细胞:
ws.addImage({
path: './screenshot1.png',
type: 'picture',
position: {
type: 'twoCellAnchor',
from: {
col: 1,
colOff: 0,
row: 10,
rowOff: 0
},
to: {
col: 4,
colOff: 0,
row: 13,
rowOff: 0
}
}
});
什么是你期待写? – Matt
csv中的实际图像。 –
它看起来像是你阅读的utf-8数据的'JSON.stringify'版本。如果你需要别的东西,不要把它作为utf-8读取,也不要使用基于JSON的工具。我不相信你可以安全地将非编码的二进制数据写入csv文件。 – Matt