Ler arquivo do excel e gerar um Relatorio sobre ele

package mascarenhas.relatorio.telefonia;

public class Tel {

		
	public static void main(String[] args) {
	
		
		HSSFWorkbook wb = new HSSFWorkbook(); // nao importa o class...

        

	
	}

	
	
}

package mascarenhas.relatorio.telefonia;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class Tel {

		
	public static void main(String[] args) {
	
		 HSSFWorkbook wb = new HSSFWorkbook();

         HSSFSheet sheet1 = wb.createSheet("Planilha Um");

         HSSFSheet sheet2 = wb.createSheet("Planilha Dois");

         HSSFSheet sheet3 = wb.createSheet("Planilha Três");

         HSSFRow row = sheet1.createRow(0);

         row.createCell((short) 0).setCellValue("Isto é uma String");

         FileOutputStream stream = null;
		
         try {
			
        	 stream = new FileOutputStream("c:/planilha.xls");
			
        	 wb.write(stream);
        	 
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        
	}
	
}

package mascarenhas.relatorio.telefonia;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class Teste {

	public static void main(String[] args) {
				
		try {
		
			FileOutputStream f = new FileOutputStream("c:/planilha1.xls");
			
			File fa = new File("c:/arquivo.xls");
						
			fa.createNewFile();
		
			
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
}

package mascarenhas.relatorio.telefonia;

import java.io.FileInputStream;
import java.io.IOException;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class Teste {

	public static void main(String[] args) throws IOException {
				
		HSSFWorkbook wb = null;
        HSSFRow row = null;   
        HSSFCell cell = null;   
        HSSFSheet sheet1 = null;
        HSSFSheet sheet2 = null;
        HSSFSheet sheet3 = null;
        HSSFRow row1 = null;
        HSSFRow row2 = null;
        HSSFCell cel = null;
        HSSFCell cel1 = null;
        HSSFCell cel2 = null;
        HSSFCell cel3 = null;
        
        String path = "c:/teste.xls";   
					
		FileInputStream fis = new FileInputStream(path);
		
		wb = new HSSFWorkbook(fis);   
		
		sheet1 = wb.getSheetAt(0);
		
		row1 = sheet1.getRow(0);
		row2 = sheet1.getRow(1);
		
		cel = row1.getCell(0);
		cel1 = row1.getCell(1);
		cel2 = row2.getCell(0);
		cel3 = row2.getCell(1);
		String nome = cel.getStringCellValue();
				
		System.out.println(nome + " " +cel1.getStringCellValue() +"\n" +cel2.getStringCellValue() +" "
						  +cel3.getStringCellValue()); // nessa instrução aqui cel3, essa celula no excel tem um numero 20
				
	}
}