How to get the last column index reading excel file?

How do i get the index of the last column when reading a xlsx file using the Apache POI API?

There's a getLastRowNum method, but I can't find nothing related to the num开发者_开发技巧ber of columns...

EDIT: I'm dealing with XLSX files

I think you'll have to iterate through the rows and check HSSFRow.getLastCellNum() on each of them.

Check each Row and call Row.getLastCellNum() the max cell number is the last column number.

Row r = sheet.getRow(rowNum);
int maxCell=  r.getLastCellNum();

To get to know the last column that has value of any row , First you need to get the row and then you can find the last column that has value

Syntax :

sheet.getrow(RowNumber).getLastCellNum();

RowNumber --> is the row number for which you want to know the last column that has value

Try this function:

private void maxExcelrowcol() {
    int row, col, maxrow, maxcol;

    //Put file name here for example filename.xls
    String filename = "filename.xls";
    static String TAG = "ExelLog";

    //you can use 'this' in place of context if you want
    Context context = getApplicationContext();

    try {
        // Creating Input Stream
        File file = new File(context.getExternalFilesDir(null), filename);
        FileInputStream myInput = new FileInputStream(file);

        // Create a POIFSFileSystem object
        POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);

        // Create a workbook using the File System
        HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);

        // Get the first sheet from workbook
        HSSFSheet mySheet = myWorkBook.getSheetAt(0);

        //Row iterator 
        Iterator rowIter = mySheet.rowIterator();

        while (rowIter.hasNext()) {
            HSSFRow myRow = (HSSFRow) rowIter.next();
            //Cell iterator for iterating from cell to next cell of a row
            Iterator cellIter = myRow.cellIterator();
            while (cellIter.hasNext()) {
                HSSFCell myCell = (HSSFCell) cellIter.next();

                row = myCell.getRowIndex();
                col = myCell.getColumnIndex();

                if (maxrow < row) {
                    maxrow = row;
                }
                if (maxcol < col) {
                    maxcol = col;
                }
            }
        }
    } catch(FileNotFoundException e) {
        e.printStackTrace();
    } catch(IOException e) {
        e.printStackTrace();
    }
}