Convert .csv to .xls in Java

Question

Does anyone here know of any quick, clean way to convert csv files to xls or xlsx files in java?

I have something to manage csv files already in place and I need the

Answer 1

Copy paste the below program,I ran the program and it is working fine,Let me know if you have any concerns on this program.(You need Apache POI Jar to run this program)

import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;

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;
import org.apache.poi.ss.usermodel.Cell;


public class CSVToExcelConverter {

    public static void main(String args[]) throws IOException
    {
        ArrayList arList=null;
        ArrayList al=null;
        String fName = "test.csv";
        String thisLine;
        int count=0;
        FileInputStream fis = new FileInputStream(fName);
        DataInputStream myInput = new DataInputStream(fis);
        int i=0;
        arList = new ArrayList();
        while ((thisLine = myInput.readLine()) != null)
        {
            al = new ArrayList();
            String strar[] = thisLine.split(",");
            for(int j=0;j