How to determine empty row?

Question

How I can determine empty rows in .xls documents using Apache POI?

Answer 1

I'm using the following method in my POI project and it's working well. It is a variation of zeller's solution.

public static boolean isRowEmpty(Row row) {
    for (int c = row.getFirstCellNum(); c < row.getLastCellNum(); c++) {
        Cell cell = row.getCell(c);
        if (cell != null && cell.getCellType() != Cell.CELL_TYPE_BLANK)
            return false;
    }
    return true;
}

Answer 2

Yes, but if in some row we will have in some cell = " " and empty values in another cells. This method will be work better:

  boolean isEmptyRow(Row row){
     boolean isEmptyRow = true;
         for(int cellNum = row.getFirstCellNum(); cellNum < row.getLastCellNum(); cellNum++){
            Cell cell = row.getCell(cellNum);
            if(cell != null && cell.getCellType() != Cell.CELL_TYPE_BLANK && StringUtils.isNotBlank(cell.toString())){
            isEmptyRow = false;
            }    
         }
     return isEmptyRow;
   }

Answer 3

If you are using apache-poi [4+]:

Then the below method works for you. As the other methods suggested did not work for me, I had to do it this way.

public static boolean isRowEmpty(Row row) {
    boolean isEmpty = true;
    DataFormatter dataFormatter = new DataFormatter();
    if(row != null) {
        for(Cell cell: row) {
            if(dataFormatter.formatCellValue(cell).trim().length() > 0) {
                isEmpty = false;
                break;
            }
        }
    }
    return isEmpty;
}

The method dataFormatter.formatCellValue(cell) would return "", an empty / ZERO length string when the cell is either null or BLANK.

The import statements for your reference:

import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Cell;

Hope this helps!

Answer 4

get the instance of CellReference and use formatAsString() on the instance. compare it with an empty String

`

if("".equals(cellRef.formatAsString())){
     System.out.println("this is an empty cell");
   }else{
      System.out.println("Cell value : "+cellRef.formatAsString());
   }

` Reference : http://www.javabeat.net/2007/10/apache-poi-reading-excel-sheet-using-java/

Answer 5

boolean isEmptyRow(Row row) {
    boolean isEmpty=true;
    String data="";
    for(Cell cell:row) {
        data=data.concat(cell.getStringCellValue());
    }
    if(!data.trim().isEmpty()) {
        isEmpty=false;
    }
    return isEmpty;
}

Answer 6

You have to iterate through all cells in the row and check if they are all empty. I don't know any other solution...

 short c;
 for (c = lastRow.getFirstCellNum(); c <= lastRow.getLastCellNum(); c++) {
     cell = lastRow.getCell(c);
     if (cell != null && lastRow.getCell(c).getCellType() != HSSFCell.CELL_TYPE_BLANK) {
          nonBlankRowFound = true;
     }
 }

The code is from here