Exception when writing to the xlsx document several times using apache poi 3.7

Question

I am getting the following exception while trying to write an .xlsx file using Apache POI: org.apache.xmlbeans.impl.values.XmlValueDisconnectedException

Answer 1

This seems to be indeed a bug in XSSFSheet.createRow(int index). As long as the bug is not fixed, using this class as a workaround should do the trick :

import java.util.Iterator;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;

public class PoiHacks
{
    // Fix of XSSFSheet.createRow(int index)
    public static Row createRow(Sheet sheet, int index) {
        Row row = sheet.getRow(index);
        if(row==null) return sheet.createRow(index);

        Iterator it = row.iterator();
        while(it.hasNext()) {
            it.next();
            it.remove();
        }
        return row;
    }
}

Use :

PoiHacks.createRow(sheet, 0);