Nil*_*ils 17 java excel poi-hssf apache-poi
我正在使用Apache的POI来使用Java操作Excel(.xls)文件.
我正在尝试创建一个新的单元格,其内容是公式的结果,就像用户复制/粘贴公式一样(我称之为"相对"方式,与"绝对"相反).
为了使自己更清楚,这里有一个简单的例子:Cell A1包含"1",B1包含"2",A2包含"3",B2包含"4".单元格A3包含以下公式"= A1 + B1".如果我将公式复制到excel下的A4单元格,它将变为"= A2 + B2":excel正在动态调整公式的内容.
不幸的是,我无法以编程方式获得相同的结果.我找到的唯一解决方案是将公式标记化并自己完成脏工作,但我真的怀疑这应该是这样做的.我无法在指南或API中找到我想要的内容.
有没有更简单的方法来解决这个问题？如果是这样的话,请指点我正确的方向吗？
最好的祝福,
尼尔斯
我也认为没有一种简单的方法可以做到这一点.
甚至POI站点上的HSSF和XSSD示例(例如TimesheetDemo)也可以手动执行公式构建.例如,在110号线附近
String ref = (char)('A' + j) + "3:" + (char)('A' + j) + "12";
cell.setCellFormula("SUM(" + ref + ")");
在我看来,user2622016是正确的,除了他的解决方案只管理单元格引用,而不是区域引用(例如它不起作用=SUM(A1:B8)).
以下是我修复此问题的方法:
private void copyFormula(Sheet sheet, Cell org, Cell dest) {
if (org == null || dest == null || sheet == null
|| org.getCellType() != Cell.CELL_TYPE_FORMULA)
return;
if (org.isPartOfArrayFormulaGroup())
return;
String formula = org.getCellFormula();
int shiftRows = dest.getRowIndex() - org.getRowIndex();
int shiftCols = dest.getColumnIndex() - org.getColumnIndex();
XSSFEvaluationWorkbook workbookWrapper =
XSSFEvaluationWorkbook.create((XSSFWorkbook) sheet.getWorkbook());
Ptg[] ptgs = FormulaParser.parse(formula, workbookWrapper, FormulaType.CELL
, sheet.getWorkbook().getSheetIndex(sheet));
for (Ptg ptg : ptgs) {
if (ptg instanceof RefPtgBase) // base class for cell references
{
RefPtgBase ref = (RefPtgBase) ptg;
if (ref.isColRelative())
ref.setColumn(ref.getColumn() + shiftCols);
if (ref.isRowRelative())
ref.setRow(ref.getRow() + shiftRows);
} else if (ptg instanceof AreaPtg) // base class for range references
{
AreaPtg ref = (AreaPtg) ptg;
if (ref.isFirstColRelative())
ref.setFirstColumn(ref.getFirstColumn() + shiftCols);
if (ref.isLastColRelative())
ref.setLastColumn(ref.getLastColumn() + shiftCols);
if (ref.isFirstRowRelative())
ref.setFirstRow(ref.getFirstRow() + shiftRows);
if (ref.isLastRowRelative())
ref.setLastRow(ref.getLastRow() + shiftRows);
}
}
formula = FormulaRenderer.toFormulaString(workbookWrapper, ptgs);
dest.setCellFormula(formula);
}
我仍然不知道我是否对所有细胞配方都正确,但它适用于我,快速可靠.
我查看了FormulaEvaluator类,发现了一些可以为我们工作的POI内部类.
FormulaParser,它将String解析为"解析事物"数组:
String formula = cell.getCellFormula();
XSSFEvaluationWorkbook workbookWrapper =
XSSFEvaluationWorkbook.create((XSSFWorkbook) workbook);
/* parse formula */
Ptg[] ptgs = FormulaParser.parse(formula, workbookWrapper,
FormulaType.CELL, 0 /*sheet index*/ );
ptgs现在是反向抛光表示法的公式.现在浏览所有元素并根据需要逐个修改引用:
/* re-calculate cell references */
for( Ptg ptg : ptgs )
if( ptg instanceof RefPtgBase ) //base class for cell reference "things"
{
RefPtgBase ref = (RefPtgBase)ptg;
if( ref.isColRelative() )
ref.setColumn( ref.getColumn() + 0 );
if( ref.isRowRelative() )
ref.setRow( ref.getRow() + 1 );
}
而且你已准备好将"解析的东西"渲染回String:
formula = FormulaRenderer.toFormulaString(workbookWrapper, ptgs);
cell.setCellFormula( formula );
另一种相对复制公式的方法，用poi 3.12测试
public static void copyCellFormula(Workbook workbook, int sheetIndex, int rowIndex, int sourceColumnIndex, int destinationColumnIndex){
XSSFEvaluationWorkbook formulaParsingWorkbook = XSSFEvaluationWorkbook.create((XSSFWorkbook) workbook);
SharedFormula sharedFormula = new SharedFormula(SpreadsheetVersion.EXCEL2007);
Sheet sheet = workbook.getSheetAt(sheetIndex);
Row lookupRow = sheet.getRow(rowIndex);
Cell sourceCell = lookupRow.getCell(sourceColumnIndex);
Ptg[] sharedFormulaPtg = FormulaParser.parse(sourceCell.getCellFormula(), formulaParsingWorkbook, FormulaType.CELL, sheetIndex);
Ptg[] convertedFormulaPtg = sharedFormula.convertSharedFormulas(sharedFormulaPtg, 0, 1);
Cell destinationCell = lookupRow.createCell(destinationColumnIndex);
destinationCell.setCellFormula(FormulaRenderer.toFormulaString(formulaParsingWorkbook, convertedFormulaPtg));
}
根据需要更新共享公式：
sharedFormula.convertSharedFormulas(sharedFormulaPtg, rowIndexOffset, columnIndexOffset);
从 poi 3.12 开始，SharedFormula 不支持来自其他工作表 (='Sheet1'!A1) 的单元格引用/公式。以下是 SharedFormula 的更新：
public class SharedFormula {
private final int _columnWrappingMask;
private final int _rowWrappingMask;
public SharedFormula(SpreadsheetVersion ssVersion) {
this._columnWrappingMask = ssVersion.getLastColumnIndex();
this._rowWrappingMask = ssVersion.getLastRowIndex();
}
public Ptg[] convertSharedFormulas(Ptg[] ptgs, int formulaRow, int formulaColumn) {
Ptg[] newPtgStack = new Ptg[ptgs.length];
RefPtgBase areaNPtg = null;
AreaPtgBase var9 = null;
Object ptg = null;
byte originalOperandClass = 0;
for(int k = 0; k < ptgs.length; ++k) {
ptg = ptgs[k];
originalOperandClass = -1;
if(!((Ptg)ptg).isBaseToken()) {
originalOperandClass = ((Ptg)ptg).getPtgClass();
}
if(ptg instanceof RefPtgBase) {
if(ptg instanceof Ref3DPxg) {
areaNPtg = (Ref3DPxg)ptg;
this.fixupRefRelativeRowAndColumn(areaNPtg, formulaRow, formulaColumn);
ptg = areaNPtg;
}else if(ptg instanceof Ref3DPtg) {
areaNPtg = (Ref3DPtg)ptg;
this.fixupRefRelativeRowAndColumn(areaNPtg, formulaRow, formulaColumn);
ptg = areaNPtg;
}else {
areaNPtg = (RefPtgBase)ptg;
ptg = new RefPtg(this.fixupRelativeRow(formulaRow, areaNPtg.getRow(), areaNPtg.isRowRelative()), this.fixupRelativeColumn(formulaColumn, areaNPtg.getColumn(), areaNPtg.isColRelative()), areaNPtg.isRowRelative(), areaNPtg.isColRelative());
}
((Ptg)ptg).setClass(originalOperandClass);
}else if(ptg instanceof AreaPtgBase) {
if(ptg instanceof Area3DPxg) {
var9 = (Area3DPxg)ptg;
this.fixupAreaRelativeRowAndColumn(var9, formulaRow, formulaColumn);
ptg = var9;
}else if(ptg instanceof Area3DPxg) {
var9 = (Area3DPtg)ptg;
this.fixupAreaRelativeRowAndColumn(var9, formulaRow, formulaColumn);
ptg = var9;
}else {
var9 = (AreaPtgBase)ptg;
ptg = new AreaPtg(this.fixupRelativeRow(formulaRow, var9.getFirstRow(), var9.isFirstRowRelative()), this.fixupRelativeRow(formulaRow, var9.getLastRow(), var9.isLastRowRelative()), this.fixupRelativeColumn(formulaColumn, var9.getFirstColumn(), var9.isFirstColRelative()), this.fixupRelativeColumn(formulaColumn, var9.getLastColumn(), var9.isLastColRelative()), var9.isFirstRowRelative(), var9.isLastRowRelative(), var9.isFirstColRelative(), var9.isLastColRelative());
}
((Ptg)ptg).setClass(originalOperandClass);
}else if(ptg instanceof OperandPtg) {
ptg = ((OperandPtg)ptg).copy();
}
newPtgStack[k] = (Ptg)ptg;
}
return newPtgStack;
}
protected void fixupRefRelativeRowAndColumn(RefPtgBase areaNPtg, int formulaRow, int formulaColumn){
areaNPtg.setRow(this.fixupRelativeRow(formulaRow, areaNPtg.getRow(), areaNPtg.isRowRelative()));
areaNPtg.setColumn(this.fixupRelativeColumn(formulaColumn, areaNPtg.getColumn(), areaNPtg.isColRelative()));
areaNPtg.setRowRelative(areaNPtg.isRowRelative());
areaNPtg.setColRelative(areaNPtg.isColRelative());
}
protected void fixupAreaRelativeRowAndColumn(AreaPtgBase var9, int formulaRow, int formulaColumn){
var9.setFirstRow(this.fixupRelativeRow(formulaRow, var9.getFirstRow(), var9.isFirstRowRelative()));
var9.setLastRow(this.fixupRelativeRow(formulaRow, var9.getLastRow(), var9.isLastRowRelative()));
var9.setFirstColumn(this.fixupRelativeColumn(formulaColumn, var9.getFirstColumn(), var9.isFirstColRelative()));
var9.setLastColumn(this.fixupRelativeColumn(formulaColumn, var9.getLastColumn(), var9.isLastColRelative()));
var9.setFirstRowRelative(var9.isFirstRowRelative());
var9.setLastRowRelative(var9.isLastRowRelative());
var9.setFirstColRelative(var9.isFirstColRelative());
var9.setLastColRelative(var9.isLastColRelative());
}
protected int fixupRelativeColumn(int currentcolumn, int column, boolean relative) {
return relative?column + currentcolumn & this._columnWrappingMask:column;
}
protected int fixupRelativeRow(int currentrow, int row, boolean relative) {
return relative?row + currentrow & this._rowWrappingMask:row;
}
}
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