.xls使用java和POI APACHE转换为xlsx

我正在尝试使用POI.APACHE来编辑java中的excel文件。 我必须将.xls转换为.xlsx，因为我需要将文件发送到sharepoint。 这就是为什么它不能用不同的扩展名重命名。 我怎么会这样呢？ 我在他们的网站上找不到任何例子。 谢谢

Answer 1

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.Iterator; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.openxml4j.exceptions.InvalidFormatException; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.CellStyle; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.xssf.usermodel.XSSFWorkbook; /** * Partial copy of one of style and data.. * * @author jcalfee */ public class xls2xlsx { /** * @param args * @throws InvalidFormatException * @throws IOException */ public static void main(String[] args) throws InvalidFormatException, IOException { String inpFn = args[0]; String outFn = args[1]; InputStream in = new BufferedInputStream(new FileInputStream(inpFn)); try { Workbook wbIn = new HSSFWorkbook(in); File outF = new File(outFn); if (outF.exists()) outF.delete(); Workbook wbOut = new XSSFWorkbook(); int sheetCnt = wbIn.getNumberOfSheets(); for (int i = 0; i < sheetCnt; i++) { Sheet sIn = wbIn.getSheetAt(0); Sheet sOut = wbOut.createSheet(sIn.getSheetName()); Iterator rowIt = sIn.rowIterator(); while (rowIt.hasNext()) { Row rowIn = rowIt.next(); Row rowOut = sOut.createRow(rowIn.getRowNum()); Iterator cellIt = rowIn.cellIterator(); while (cellIt.hasNext()) { Cell cellIn = cellIt.next(); Cell cellOut = rowOut.createCell( cellIn.getColumnIndex(), cellIn.getCellType()); switch (cellIn.getCellType()) { case Cell.CELL_TYPE_BLANK: break; case Cell.CELL_TYPE_BOOLEAN: cellOut.setCellValue(cellIn.getBooleanCellValue()); break; case Cell.CELL_TYPE_ERROR: cellOut.setCellValue(cellIn.getErrorCellValue()); break; case Cell.CELL_TYPE_FORMULA: cellOut.setCellFormula(cellIn.getCellFormula()); break; case Cell.CELL_TYPE_NUMERIC: cellOut.setCellValue(cellIn.getNumericCellValue()); break; case Cell.CELL_TYPE_STRING: cellOut.setCellValue(cellIn.getStringCellValue()); break; } { CellStyle styleIn = cellIn.getCellStyle(); CellStyle styleOut = cellOut.getCellStyle(); styleOut.setDataFormat(styleIn.getDataFormat()); } cellOut.setCellComment(cellIn.getCellComment()); // HSSFCellStyle cannot be cast to XSSFCellStyle // cellOut.setCellStyle(cellIn.getCellStyle()); } } } OutputStream out = new BufferedOutputStream(new FileOutputStream( outF)); try { wbOut.write(out); } finally { out.close(); } } finally { in.close(); } } }