java 获取excel最后一行_查找Excel电子表格中的最后一行
確切知道的唯一方法是測試行 . 這是我用于同一問題的解決方案：
int lastRowIndex = -1;
if( sheet.getPhysicalNumberOfRows() > 0 )
{
// getLastRowNum() actually returns an index, not a row number
lastRowIndex = sheet.getLastRowNum();
// now, start at end of spreadsheet and work our way backwards until we find a row having data
for( ; lastRowIndex >= 0; lastRowIndex-- ){
Row row = sheet.getRow( lastRowIndex );
if( row != null ){
break;
}
}
}
注意：這不會檢查看似空但不是的行，例如其中包含空字符串的單元格 . 為此，您需要一個更完整的解決方案，例如：
private int determineRowCount()
{
this.evaluator = workbook.getCreationHelper().createFormulaEvaluator();
this.formatter = new DataFormatter( true );
int lastRowIndex = -1;
if( sheet.getPhysicalNumberOfRows() > 0 )
{
// getLastRowNum() actually returns an index, not a row number
lastRowIndex = sheet.getLastRowNum();
// now, start at end of spreadsheet and work our way backwards until we find a row having data
for( ; lastRowIndex >= 0; lastRowIndex-- )
{
Row row = sheet.getRow( lastRowIndex );
if( !isRowEmpty( row ) )
{
break;
}
}
}
return lastRowIndex;
}
/**
* Determine whether a row is effectively completely empty - i.e. all cells either contain an empty string or nothing.
*/
private boolean isRowEmpty( Row row )
{
if( row == null ){
return true;
}
int cellCount = row.getLastCellNum() + 1;
for( int i = 0; i < cellCount; i++ ){
String cellValue = getCellValue( row, i );
if( cellValue != null && cellValue.length() > 0 ){
return false;
}
}
return true;
}
/**
* Get the effective value of a cell, formatted according to the formatting of the cell.
* If the cell contains a formula, it is evaluated first, then the result is formatted.
*
* @param row the row
* @param columnIndex the cell's column index
* @return the cell's value
*/
private String getCellValue( Row row, int columnIndex )
{
String cellValue;
Cell cell = row.getCell( columnIndex );
if( cell == null ){
// no data in this cell
cellValue = null;
}
else{
if( cell.getCellType() != Cell.CELL_TYPE_FORMULA ){
// cell has a value, so format it into a string
cellValue = this.formatter.formatCellValue( cell );
}
else {
// cell has a formula, so evaluate it
cellValue = this.formatter.formatCellValue( cell, this.evaluator );
}
}
return cellValue;
}
總結
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