使用到的包: poi-ooxml-3.14.jar; poi-ooxml.jar;
1. 在網上查找相關文件,最多的答案就是使用 HSSFWorkbook 進行讀取:
POIFSFileSystem poifsFileSystem = new POIFSFileSystem(new FileInputStream(file)); HSSFWorkbook workbook = new HSSFWorkbook(poifsFileSystem);
結果:對xlsx文件識別不了;
2.專門針對xlsx文件找解決方案,得到用 XSSFWorkbook 進行處理;
XSSFWorkbook workbook = new XSSFWorkbook(new BufferedInputStream(stream));
結果:可以識別xlsx文件;
3.需要對文件進行判定,什么情況用 HSSFWorkbook,什么情況下用XSSFWorkbook
if(!inp.markSupported()) inp = new PushbackInputStream(inp, 8); if(NPOIFSFileSystem.hasPOIFSHeader(IOUtils.peekFirst8Bytes(inp))){ NPOIFSFileSystem fs = new NPOIFSFileSystem(inp); }else if(POIXMLDocument.hasOOXMLHeader(inp)) return new XSSFWorkbook(OPCPackage.open(inp)); else throw new InvalidFormatException("你的excel版本目前poi解析不了");
ok,看似完美解決問題,但其實在WorkbookFactory里已經有了對excel 的相關操作方法
4. 借用工具類 WorkbookFactory
/** * Creates the appropriate HSSFWorkbook / XSSFWorkbook from * the given InputStream. * Your input stream MUST either support mark/reset, or * be wrapped as a {@link PushbackInputStream}! */ public static Workbook create(InputStream inp) throws IOException, InvalidFormatException { // If clearly doesn't do mark/reset, wrap up if(! inp.markSupported()) { inp = new PushbackInputStream(inp, 8); } if(POIFSFileSystem.hasPOIFSHeader(inp)) { return new HSSFWorkbook(inp); } if(POIXMLDocument.hasOOXMLHeader(inp)) { return new XSSFWorkbook(OPCPackage.open(inp)); } throw new IllegalArgumentException("Your InputStream was neither an OLE2 stream, nor an OOXML stream"); }
5. 終極版
Workbook workbook = WorkbookFactory.create(new FileInputStream(file));
一行代碼搞定,^_^;