我正在使用 POI XSSF API,我想转置一张纸。
我怎样才能做到这一点?
谢谢。
转置,如将 A2 与 B1 交换,将 A3 与 C1 交换(因此列变为行)?
如果是这样,则没有内置任何内容,因此您需要自己编写一些代码。您可能想要获取一对单元格,保存其中一个单元格的内容(值和样式),将第二个单元格复制到第一个单元格,然后覆盖第二个单元格。
如果您不确定所有读/写部分,请参阅快速指南。
我一直在寻找相同的答案,不得不自己编写代码。我附上了我的非常简单的解决方案:
我使用的代码是:
public static void transpose(Workbook wb, int sheetNum, boolean replaceOriginalSheet) {
Sheet sheet = wb.getSheetAt(sheetNum);
Pair<Integer, Integer> lastRowColumn = getLastRowAndLastColumn(sheet);
int lastRow = lastRowColumn.getFirst();
int lastColumn = lastRowColumn.getSecond();
LOG.debug("Sheet {} has {} rows and {} columns, transposing ...", new Object[] {sheet.getSheetName(), 1+lastRow, lastColumn});
List<CellModel> allCells = new ArrayList<CellModel>();
for (int rowNum = 0; rowNum <= lastRow; rowNum++) {
Row row = sheet.getRow(rowNum);
if (row == null) {
continue;
}
for (int columnNum = 0; columnNum < lastColumn; columnNum++) {
Cell cell = row.getCell(columnNum);
allCells.add(new CellModel(cell));
}
}
LOG.debug("Read {} cells ... transposing them", allCells.size());
Sheet tSheet = wb.createSheet(sheet.getSheetName() + "_transposed");
for (CellModel cm : allCells) {
if (cm.isBlank()) {
continue;
}
int tRow = cm.getColNum();
int tColumn = cm.getRowNum();
Row row = tSheet.getRow(tRow);
if (row == null) {
row = tSheet.createRow(tRow);
}
Cell cell = row.createCell(tColumn);
cm.insertInto(cell);
}
lastRowColumn = getLastRowAndLastColumn(sheet);
lastRow = lastRowColumn.getFirst();
lastColumn = lastRowColumn.getSecond();
LOG.debug("Transposing done. {} now has {} rows and {} columns.", new Object[] {tSheet.getSheetName(), 1+lastRow, lastColumn});
if (replaceOriginalSheet) {
int pos = wb.getSheetIndex(sheet);
wb.removeSheetAt(pos);
wb.setSheetOrder(tSheet.getSheetName(), pos);
}
}
private static Pair<Integer, Integer> getLastRowAndLastColumn(Sheet sheet) {
int lastRow = sheet.getLastRowNum();
int lastColumn = 0;
for (Row row : sheet) {
if (lastColumn < row.getLastCellNum()) {
lastColumn = row.getLastCellNum();
}
}
return new Pair<Integer, Integer>(lastRow, lastColumn);
}
其中 CellModel 是一个包装器,它保存 Cell 包含的数据(如果您喜欢,可以添加更多属性,例如,评论,...):
static class CellModel {
private int rowNum = -1;
private int colNum = -1;
private CellStyle cellStyle;
private int cellType = -1;
private Object cellValue;
public CellModel(Cell cell) {
if (cell != null) {
this.rowNum = cell.getRowIndex();
this.colNum = cell.getColumnIndex();
this.cellStyle = cell.getCellStyle();
this.cellType = cell.getCellType();
switch (this.cellType) {
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_BOOLEAN:
cellValue = cell.getBooleanCellValue();
break;
case Cell.CELL_TYPE_ERROR:
cellValue = cell.getErrorCellValue();
break;
case Cell.CELL_TYPE_FORMULA:
cellValue = cell.getCellFormula();
break;
case Cell.CELL_TYPE_NUMERIC:
cellValue = cell.getNumericCellValue();
break;
case Cell.CELL_TYPE_STRING:
cellValue = cell.getRichStringCellValue();
break;
}
}
}
public boolean isBlank() {
return this.cellType == -1 && this.rowNum == -1 && this.colNum == -1;
}
public void insertInto(Cell cell) {
if (isBlank()) {
return;
}
cell.setCellStyle(this.cellStyle);
cell.setCellType(this.cellType);
switch (this.cellType) {
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_BOOLEAN:
cell.setCellValue((boolean) this.cellValue);
break;
case Cell.CELL_TYPE_ERROR:
cell.setCellErrorValue((byte) this.cellValue);
break;
case Cell.CELL_TYPE_FORMULA:
cell.setCellFormula((String) this.cellValue);
break;
case Cell.CELL_TYPE_NUMERIC:
cell.setCellValue((double) this.cellValue);
break;
case Cell.CELL_TYPE_STRING:
cell.setCellValue((RichTextString) this.cellValue);
break;
}
}
public CellStyle getCellStyle() {
return cellStyle;
}
public int getCellType() {
return cellType;
}
public Object getCellValue() {
return cellValue;
}
public int getRowNum() {
return rowNum;
}
public int getColNum() {
return colNum;
}
}