Microsoft Excel提供了一个使用Unicode编码导出电子表格的选项。请看下面的截图。

我发现OpenOffice的电子表格应用程序Calc非常擅长处理CSV数据。

在“另存为…”对话框中，单击“格式选项”可获得CSV的不同编码。LibreOffice的工作原理与AFAIK相同。

Microsoft Excel提供了一个使用Unicode编码导出电子表格的选项。请看下面的截图。

使用Powershell怎么样?

Get-Content 'C:\my.csv' | Out-File 'C:\my_utf8.csv' -Encoding UTF8

I needed to automate this process on my Mac. I originally tried using catdoc/xls2csv as suggested by mpowered, but xls2csv had trouble detecting the original encoding of the document and not all documents were the same. What I ended up doing was setting the default webpage output encoding to be UTF-8 and then providing the files to Apple's Automator, applying the Convert Format of Excel Files action to convert to Web Page (HTML). Then using PHP, DOMDocument and XPath, I queried the documents and formatted them to CSV.

这是PHP脚本(process.php):

<?php
$pi = pathinfo($argv[1]);
$file = $pi['dirname'] . '/' . $pi['filename'] . '.csv';
$fp = fopen($file,'w+');
$doc = new DOMDocument;
$doc->loadHTMLFile($argv[1]);
$xpath = new DOMXPath($doc);
$table = [];
foreach($xpath->query('//tr') as $row){
    $_r = [];
    foreach($xpath->query('td',$row) as $col){
        $_r[] = trim($col->textContent);
    }
    fputcsv($fp,$_r);
}
fclose($fp);
?>

这是我用来将HTML文档转换为csv的shell命令:

find . -name '*.htm' | xargs -I{} php ./process.php {}

这是一种非常非常迂回的方法，但这是我发现的最可靠的方法。

(在Mac上:)从Excel保存为CSV文件。在TextWrangler中打开CSV文件(它是免费的)，并使用“另存为”。在保存对话框中选择Unicode (UTF-8)。完成

(我猜你也可以用TextEdit做到这一点-如果你玩打开和保存设置。尝试打开文件:自动，保存文件:UTF-8)