Advanced Excel Reader useful for selenium WebDriver

In this post I am going to explain how can we read and write data on excel file with the help of Java using Apache POI jar libraries.

Here we can retrieve the data from cell based on row number,column name and data is set into cell based on column name and row number.

 Download Apache POI jar libraries in following link  and configure to your project.
 Download Apache POI jar

Sample Code:
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.xssf.usermodel.*;
import java.io.*;

public class ExcelReader 
{
public static String filename = System.getProperty("user.dir");
public  String path;
public  FileInputStream fis = null;
public  FileOutputStream fileOut =null;
private XSSFWorkbook workbook = null;
private XSSFSheet sheet = null;
private XSSFRow row   =null;
private XSSFCell cell = null;
public static String sActionKeyword=null;

//constructor for path setting
public ExcelReader(String path) 
{
this.path=path;
try 
{
fis = new FileInputStream(path);
workbook = new XSSFWorkbook(fis);
sheet = workbook.getSheetAt(0);
fis.close();
}
catch (Exception e) 
{
e.printStackTrace();
} 

}

// returns the data from a cell based on row and column name
public String getCellData(String sheetName,String colName,int rowNum)
{
try
{
if(rowNum <=0)
return "";

int index = workbook.getSheetIndex(sheetName);
int col_Num=-1;
if(index==-1)
return "";

sheet = workbook.getSheetAt(index);
row=sheet.getRow(0);
for(int i=0;i<row.getLastCellNum();i++)
{
//System.out.println(row.getCell(i).getStringCellValue().trim());
if(row.getCell(i).getStringCellValue().trim().equals(colName.trim()))
col_Num=i;
}
if(col_Num==-1)
return "";

sheet = workbook.getSheetAt(index);
row = sheet.getRow(rowNum-1);
if(row==null)
return "";
cell = row.getCell(col_Num);

if(cell==null)
return "";
//System.out.println(cell.getCellType());
if(cell.getCellType()==Cell.CELL_TYPE_STRING)
 return cell.getStringCellValue();
else if(cell.getCellType()==Cell.CELL_TYPE_NUMERIC || cell.getCellType()==Cell.CELL_TYPE_FORMULA )
{
 
    String cellText  = String.valueOf(cell.getNumericCellValue());
 
return cellText;
 }
else if(cell.getCellType()==Cell.CELL_TYPE_BLANK)
     return ""; 
 else 
 return String.valueOf(cell.getBooleanCellValue());

}
catch(Exception e)
{

e.printStackTrace();
return "row "+rowNum+" or column "+colName +" does not exist in xls";
}
}
// returns true if data is set successfully into cell using column name and row number
public boolean setCellData(String sheetName,String colName,int rowNum, String data)
{
try
{
fis = new FileInputStream(path); 
workbook = new XSSFWorkbook(fis);

if(rowNum<=0)
return false;

int index = workbook.getSheetIndex(sheetName);
int colNum=-1;
if(index==-1)
return false;
sheet = workbook.getSheetAt(index);

row=sheet.getRow(0);
for(int i=0;i<row.getLastCellNum();i++)
{
//System.out.println(row.getCell(i).getStringCellValue().trim());
if(row.getCell(i).getStringCellValue().trim().equals(colName))
colNum=i;
}
if(colNum==-1)
return false;

sheet.autoSizeColumn(colNum); 
row = sheet.getRow(rowNum-1);
if (row == null)
row = sheet.createRow(rowNum-1);

cell = row.getCell(colNum);
if (cell == null)
       cell = row.createCell(colNum);

   
   cell.setCellValue(data);

   fileOut = new FileOutputStream(path);

workbook.write(fileOut);

   fileOut.close();

}
catch(Exception e)
{
e.printStackTrace();
return false;
}
return true;
}
//Usage
  public static void main(String[] args) throws IOException{
  
  ExcelReader ereader = new ExcelReader("C:/Users/Sudharsan/Desktop/TestData.xlsx");
  System.out.println(ereader.getCellData("Sheet1", "Username", 2));
  ereader.setCellData("Sheet1", "Password", 2, "Sgian@1234");
 }

}