Read large CSV in java

Question

I want to read huge data from CSV, containing around 500,000 rows. I am using OpenCSV library for it. My code for it is like this

    CsvToBean c         


        

Answer 1

Below Example through you read n number of records from csv file.

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class ReadCSV 
{
    public static void main(String[] args) 
    {
        String csvFile = "C:/Users/LENOVO/Downloads/Compressed/GeoIPCountryWhois.csv";
        BufferedReader br = null;
        String line = "";
        String cvsSplitBy = ",";

        try 
        {
            br = new BufferedReader(new FileReader(csvFile));
            while ((line = br.readLine()) != null) 
            {
                // use comma as separator
                String[] country = line.split(cvsSplitBy);

                System.out.println("Country [code= " + country[4] + " , name=" + country[5] + "]");
            }

        }
        catch (FileNotFoundException e) 
        {
            e.printStackTrace();
        } 
        catch (IOException e) 
        {
            e.printStackTrace();
        } 
        finally 
        {
            if (br != null) 
            {
                try 
                {
                    br.close();
                } 
                catch (IOException e) 
                {
                    e.printStackTrace();
                }
            }
        }
        System.out.println("Done");
    }
}