使用Apache POI确定MS Excel文件类型 [英] Determine MS Excel file type with Apache POI

问题描述

有没有办法确定Apache POI中的MS Office Excel文件类型？我需要知道什么格式的Excel文件：在Excel '97（-2007）（.xls）或Excel 2007 OOXML（.xlsx）。

Is there a way to determine MS Office Excel file type in Apache POI? I need to know in what format is the Excel file: in Excel '97(-2007) (.xls) or Excel 2007 OOXML (.xlsx).

我想我可以这样做：

int type = PoiTypeHelper.getType(file);
switch (type) {
case PoiType.EXCEL_1997_2007:
   ...
   break;
case PoiType.EXCEL_2007:
   ...
   break;
default:
   ...
}

谢谢。 / p>

Thanks.

推荐答案

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如果你'要做一些特殊的文件，然后 rjokelai的答案是这样做的方式。

If you're going to be doing something special with the files, then rjokelai's answer is the way to do it.

但是，如果您只是要使用HSSF / XSSF / Common SS用户名，那么让POI为您做的更简单，并使用 WorkbookFactory 为您检测并打开类型。你可以这样做：

However, if you're just going to be using the HSSF / XSSF / Common SS usermodel, then it's much simpler to have POI do it for you, and use WorkbookFactory to have the type detected and opened for you. You'd do something like:

 Workbook wb = WorkbookFactory.create(new File("something.xls"));

或

 Workbook wb = WorkbookFactory.create(request.getInputStream());

然后如果你需要做一些特别的事情，测试它是否是一个 HSSFWorkbook 或 XSSFWorkbook 。打开文件时，如果可能，使用文件而不是InputStream 加快速度，节省内存。

Then if you needed to do something special, test if it's a HSSFWorkbook or XSSFWorkbook. When opening the file, use a File rather than an InputStream if possible to speed things up and save memory.

如果您不知道自己的文件是什么，请使用 Apache Tika 进行检测 - 它可以为您检测大量不同的文件格式。

If you don't know what your file is at all, use Apache Tika to do the detection - it can detect a huge number of different file formats for you.

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