For the sake of simplicity, this article USES HSSF classes.

为简单起见，本文使用hssf类。

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The HSSF classes are for working with Excel versions before 2007 (that is,.xls files).

hssf类用于处理2007版之前的Excel(即. xls文件)。

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The Apache POI API programmers chose an unusual naming convention for their classes involving Excel workbooks; they used the prefix HSSF.

Apache POI API 程序员为他们的那些涉及 Excel 工作簿的类选择了一个不寻常的命名惯例：他们使用前缀 HSSF。

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