How to convert
org.apache.poi.hssf.usermodel.HSSFWorkbook
to
org.apache.poi.xssf.usermodel.XSSFWorkbook
in Apache POI?
Environment :
- JSE1.6
- JBossAS 4.3.2
- POI 3.7
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Answer
this code has been adapted from what I found here on coderanch forum
public final class ExcelDocumentConverter {
public static XSSFWorkbook convertWorkbookHSSFToXSSF(HSSFWorkbook source) {
XSSFWorkbook retVal = new XSSFWorkbook();
for (int i = 0; i < source.getNumberOfSheets(); i++) {
XSSFSheet xssfSheet = retVal.createSheet();
HSSFSheet hssfsheet = source.getSheetAt(i);
copySheets(hssfsheet, xssfSheet);
}
return retVal;
}
public static void copySheets(HSSFSheet source, XSSFSheet destination) {
copySheets(source, destination, true);
}
/**
* @param destination
* the sheet to create from the copy.
* @param the
* sheet to copy.
* @param copyStyle
* true copy the style.
*/
public static void copySheets(HSSFSheet source, XSSFSheet destination, boolean copyStyle) {
int maxColumnNum = 0;
Map<Integer, HSSFCellStyle> styleMap = (copyStyle) ? new HashMap<Integer, HSSFCellStyle>() : null;
for (int i = source.getFirstRowNum(); i <= source.getLastRowNum(); i++) {
HSSFRow srcRow = source.getRow(i);
XSSFRow destRow = destination.createRow(i);
if (srcRow != null) {
copyRow(source, destination, srcRow, destRow, styleMap);
if (srcRow.getLastCellNum() > maxColumnNum) {
maxColumnNum = srcRow.getLastCellNum();
}
}
}
for (int i = 0; i <= maxColumnNum; i++) {
destination.setColumnWidth(i, source.getColumnWidth(i));
}
}
/**
* @param srcSheet
* the sheet to copy.
* @param destSheet
* the sheet to create.
* @param srcRow
* the row to copy.
* @param destRow
* the row to create.
* @param styleMap
* -
*/
public static void copyRow(HSSFSheet srcSheet, XSSFSheet destSheet, HSSFRow srcRow, XSSFRow destRow,
Map<Integer, HSSFCellStyle> styleMap) {
// manage a list of merged zone in order to not insert two times a
// merged zone
Set<CellRangeAddressWrapper> mergedRegions = new TreeSet<CellRangeAddressWrapper>();
destRow.setHeight(srcRow.getHeight());
// pour chaque row
for (int j = srcRow.getFirstCellNum(); j <= srcRow.getLastCellNum(); j++) {
HSSFCell oldCell = srcRow.getCell(j); // ancienne cell
XSSFCell newCell = destRow.getCell(j); // new cell
if (oldCell != null) {
if (newCell == null) {
newCell = destRow.createCell(j);
}
// copy chaque cell
copyCell(oldCell, newCell, styleMap);
// copy les informations de fusion entre les cellules
// System.out.println("row num: " + srcRow.getRowNum() +
// " , col: " + (short)oldCell.getColumnIndex());
CellRangeAddress mergedRegion = getMergedRegion(srcSheet, srcRow.getRowNum(),
(short) oldCell.getColumnIndex());
if (mergedRegion != null) {
// System.out.println("Selected merged region: " +
// mergedRegion.toString());
CellRangeAddress newMergedRegion = new CellRangeAddress(mergedRegion.getFirstRow(),
mergedRegion.getLastRow(), mergedRegion.getFirstColumn(), mergedRegion.getLastColumn());
// System.out.println("New merged region: " +
// newMergedRegion.toString());
CellRangeAddressWrapper wrapper = new CellRangeAddressWrapper(newMergedRegion);
if (isNewMergedRegion(wrapper, mergedRegions)) {
mergedRegions.add(wrapper);
destSheet.addMergedRegion(wrapper.range);
}
}
}
}
}
/**
* @param oldCell
* @param newCell
* @param styleMap
*/
public static void copyCell(HSSFCell oldCell, XSSFCell newCell, Map<Integer, HSSFCellStyle> styleMap) {
if (styleMap != null) {
int stHashCode = oldCell.getCellStyle().hashCode();
HSSFCellStyle sourceCellStyle = styleMap.get(stHashCode);
XSSFCellStyle destnCellStyle = newCell.getCellStyle();
if (sourceCellStyle == null) {
sourceCellStyle = oldCell.getSheet().getWorkbook().createCellStyle();
}
destnCellStyle.cloneStyleFrom(oldCell.getCellStyle());
styleMap.put(stHashCode, sourceCellStyle);
newCell.setCellStyle(destnCellStyle);
}
switch (oldCell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
newCell.setCellValue(oldCell.getStringCellValue());
break;
case HSSFCell.CELL_TYPE_NUMERIC:
newCell.setCellValue(oldCell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_BLANK:
newCell.setCellType(HSSFCell.CELL_TYPE_BLANK);
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
newCell.setCellValue(oldCell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_ERROR:
newCell.setCellErrorValue(oldCell.getErrorCellValue());
break;
case HSSFCell.CELL_TYPE_FORMULA:
newCell.setCellFormula(oldCell.getCellFormula());
break;
default:
break;
}
}
/**
* Récupère les informations de fusion des cellules dans la sheet source
* pour les appliquer à la sheet destination... Récupère toutes les zones
* merged dans la sheet source et regarde pour chacune d'elle si elle se
* trouve dans la current row que nous traitons. Si oui, retourne l'objet
* CellRangeAddress.
*
* @param sheet
* the sheet containing the data.
* @param rowNum
* the num of the row to copy.
* @param cellNum
* the num of the cell to copy.
* @return the CellRangeAddress created.
*/
public static CellRangeAddress getMergedRegion(HSSFSheet sheet, int rowNum, short cellNum) {
for (int i = 0; i < sheet.getNumMergedRegions(); i++) {
CellRangeAddress merged = sheet.getMergedRegion(i);
if (merged.isInRange(rowNum, cellNum)) {
return merged;
}
}
return null;
}
/**
* Check that the merged region has been created in the destination sheet.
*
* @param newMergedRegion
* the merged region to copy or not in the destination sheet.
* @param mergedRegions
* the list containing all the merged region.
* @return true if the merged region is already in the list or not.
*/
private static boolean isNewMergedRegion(CellRangeAddressWrapper newMergedRegion,
Set<CellRangeAddressWrapper> mergedRegions) {
return !mergedRegions.contains(newMergedRegion);
}
}