CSV File Writing By Appending Data

In the post I am going to explaining CSV File Writing By Appending Data by using opencsv jar file. You can see what is CSV file?. Find the below example and see how to creating csv file by appending data using FileWriter class.

Before going to write java program we need to download opencsv jar file and assign to build path.

OpenCsvWriterByAppend.java

/*
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 */
package com.narayanatutorial.opencsv;

import au.com.bytecode.opencsv.CSVWriter;
import java.io.FileWriter;

public class OpenCsvWriterByAppend {

    public static void main(String args[]) {
                String csvFilename = "D:/narayanatutorial/SampleFiles/OpenCSVWriteByAppend.csv";
        try {

            FileWriter csvwriter = new FileWriter(csvFilename);
            csvwriter.append("FIRSTNAME");
            csvwriter.append(",");
            csvwriter.append("LASTNAME");
            csvwriter.append(",");
            csvwriter.append("AGE");
            csvwriter.append(",");
            csvwriter.append("\n");

            csvwriter.append("Narayana");
            csvwriter.append(",");
            csvwriter.append("Ragi");
            csvwriter.append(",");
            csvwriter.append("'300000000000");
            csvwriter.append(",");
            csvwriter.append("\n");
            csvwriter.close();
            System.out.println("CSV file created succesfully.");
        } catch (Exception e) {
            System.out.println("exception :" + e.getMessage());
        }

    }
}

Output

CSV file created succesfully.

You can find the output as follows in the generated csv file.

FIRSTNAME,LASTNAME,AGE,
Narayana,Ragi,'300000000000,

you can find the above sample program in the github. If you have git account you can download from github and other sample programs also available and find the below github link to download. We used Netbeans IDE to develop sample programs. So you can directly import into Netbeans if you are having Netbeans else create sample project in your IDE and replace src folder.

Git link

I hope you understand CSV File Writing By Appending Data by using opencsv jar file.