Java tutorial
package gov.nih.nci.evs.app.neopl; import java.io.*; import java.util.*; import org.apache.poi.hssf.usermodel.*; 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.*; import org.apache.poi.xssf.usermodel.XSSFWorkbook; /** * <!-- LICENSE_TEXT_START --> * Copyright 2008-2016 NGIS. This software was developed in conjunction * with the National Cancer Institute, and so to the extent government * employees are co-authors, any rights in such works shall be subject * to Title 17 of the United States Code, section 105. * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the disclaimer of Article 3, * below. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * 2. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by NGIS and the National * Cancer Institute." If no such end-user documentation is to be * included, this acknowledgment shall appear in the software itself, * wherever such third-party acknowledgments normally appear. * 3. The names "The National Cancer Institute", "NCI" and "NGIS" must * not be used to endorse or promote products derived from this software. * 4. This license does not authorize the incorporation of this software * into any third party proprietary programs. This license does not * authorize the recipient to use any trademarks owned by either NCI * or NGIS * 5. THIS SOFTWARE IS PROVIDED "AS IS," AND ANY EXPRESSED OR IMPLIED * WARRANTIES, (INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE) ARE * DISCLAIMED. IN NO EVENT SHALL THE NATIONAL CANCER INSTITUTE, * NGIS, OR THEIR AFFILIATES BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * <!-- LICENSE_TEXT_END --> */ /** * @author EVS Team * @version 1.0 * * Modification history: * Initial implementation kim.ong@ngc.com * */ public class XLStoXLSX { /** * @param args * @throws InvalidFormatException * @throws IOException */ public static void run(String inputfile, String outputfile) throws IOException { InputStream in = new BufferedInputStream(new FileInputStream(inputfile)); try { Workbook wbIn = new HSSFWorkbook(in); File outFn = new File(outputfile); if (outFn.exists()) { outFn.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<Row> rowIt = sIn.rowIterator(); while (rowIt.hasNext()) { Row rowIn = rowIt.next(); Row rowOut = sOut.createRow(rowIn.getRowNum()); Iterator<Cell> 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(outFn)); try { wbOut.write(out); } finally { out.close(); } } finally { in.close(); } } public static void main(String[] args) throws IOException { String inputfile = args[0]; String outputfile = args[1]; run(inputfile, outputfile); } }