how to read a excel file in java

1//You need Apache POI library in order to work this code
2
3//Using Apache POI
4    import java.io.File;  
5    import java.io.FileInputStream;  
6    import java.io.IOException;  
7    import org.apache.poi.hssf.usermodel.HSSFSheet;  
8    import org.apache.poi.hssf.usermodel.HSSFWorkbook;  
9    import org.apache.poi.ss.usermodel.Cell;  
10    import org.apache.poi.ss.usermodel.FormulaEvaluator;  
11    import org.apache.poi.ss.usermodel.Row;  
12    public class ReadExcelFileDemo  
13    {  
14    public static void main(String args[]) throws IOException  
15    {  
16    //obtaining input bytes from a file  
17    FileInputStream fis=new FileInputStream(new File("C:\\demo\\student.xls"));  
18    //creating workbook instance that refers to .xls file  
19    HSSFWorkbook wb=new HSSFWorkbook(fis);   
20    //creating a Sheet object to retrieve the object  
21    HSSFSheet sheet=wb.getSheetAt(0);  
22    //evaluating cell type   
23    FormulaEvaluator formulaEvaluator=wb.getCreationHelper().createFormulaEvaluator();  
24    for(Row row: sheet)     //iteration over row using for each loop  
25    {  
26    for(Cell cell: row)    //iteration over cell using for each loop  
27    {  
28    switch(formulaEvaluator.evaluateInCell(cell).getCellType())  
29    {  
30    case Cell.CELL_TYPE_NUMERIC:   //field that represents numeric cell type  
31    //getting the value of the cell as a number  
32    System.out.print(cell.getNumericCellValue()+ "\t\t");   
33    break;  
34    case Cell.CELL_TYPE_STRING:    //field that represents string cell type  
35    //getting the value of the cell as a string  
36    System.out.print(cell.getStringCellValue()+ "\t\t");  
37    break;  
38    }  
39    }  
40    System.out.println();  
41    }  
42    }  
43    }