在 java-JXL 或 ApachePOI 中读取 Excel 表的更好的 API 是什么

这两个 API 中哪一个对于读/写/编辑 Excel 表更简单？ 这些 API 不支持 CSV 扩展吗？

对 file.xls 和 file.xlsx 使用 JXL 会得到一个例外，比如:

jxl.read.biff.BiffException: Unable to recognize OLE stream
at jxl.read.biff.CompoundFile.<init>(CompoundFile.java:116)
at jxl.read.biff.File.<init>(File.java:127)
at jxl.Workbook.getWorkbook(Workbook.java:268)
at core.ReadXLSheet.contentReading(ReadXLSheet.java:46)
at core.ReadXLSheet.init(ReadXLSheet.java:22)
at core.ReadXLSheet.main(ReadXLSheet.java:72)

对于.xls 和.xlsx 扩展都是如此。 我使用的 Java 版本是: JDK1.6

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I have used POI.

If you use that, keep on eye those cell formatters: create one and use it multiple times instead of creating each time for cell, it is a huge memory consumption difference on large data.

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I am not familiar with JXL and but we use POI. POI is well maintained and can handle both the binary .xls format and the new xml based format that was introduced in Office 2007.

CSV files are not excel files, they are text based files, so these libraries don't read them. You will need to parse out a CSV file yourself. I am not aware of any CSV file libraries, but I haven't looked either.

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最佳答案

I have used both JXL (now "JExcel") and Apache POI. At first I used JXL, but now I use Apache POI.

First, here are the things where both APIs have the same end functionality:

  • Both are free
  • Cell styling: alignment, backgrounds (colors and patterns), borders (types and colors), font support (font names, colors, size, bold, italic, strikeout, underline)
  • Formulas
  • Hyperlinks
  • Merged cell regions
  • Size of rows and columns
  • Data formatting: Numbers and Dates
  • Text wrapping within cells
  • Freeze Panes
  • Header/Footer support
  • Read/Write existing and new spreadsheets
  • Both attempt to keep existing objects in spreadsheets they read in intact as far as possible.

However, there are many differences:

  • Perhaps the most significant difference is that Java JXL does not support the Excel 2007+ ".xlsx" format; it only supports the old BIFF (binary) ".xls" format. Apache POI supports both with a common design.
  • Additionally, the Java portion of the JXL API was last updated in 2009 (3 years, 4 months ago as I write this), although it looks like there is a C# API. Apache POI is actively maintained.
  • JXL doesn't support Conditional Formatting, Apache POI does, although this is not that significant, because you can conditionally format cells with your own code.
  • JXL doesn't support rich text formatting, i.e. different formatting within a text string; Apache POI does support it.
  • JXL only supports certain text rotations: horizontal/vertical, +/- 45 degrees, and stacked; Apache POI supports any integer number of degrees plus stacked.
  • JXL doesn't support drawing shapes; Apache POI does.
  • JXL supports most Page Setup settings such as Landscape/Portrait, Margins, Paper size, and Zoom. Apache POI supports all of that plus Repeating Rows and Columns.
  • JXL doesn't support Split Panes; Apache POI does.
  • JXL doesn't support Chart creation or manipulation; that support isn't there yet in Apache POI, but an API is slowly starting to form.
  • Apache POI has a more extensive set of documentation and examples available than JXL.

Additionally, POI contains not just the main "usermodel" API, but also an event-based API if all you want to do is read the spreadsheet content.

In conclusion, because of the better documentation, more features, active development, and Excel 2007+ format support, I use Apache POI.

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For reading "plain" CSV files in Java, there is a library called OpenCSV, available here: http://opencsv.sourceforge.net/


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