How to Read and Parse CSV File in Java

In this example, let’s see how to read and parse CSV file in Java.

Source Code

(1) Read CSV File To Java

package com.beginner.examples;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;

import com.csvreader.CsvReader;

/**
 * @desc Read CSV files
 */

public class ReadCSV {

	public static void main(String[] args) {
		try {
			FileReader fileReader = new FileReader("E:tmptest.csv");
			CsvReader reader = new CsvReader(fileReader,',');
			ArrayList csvList = new ArrayList();
			while(reader.readRecord()) {
				csvList.add(reader.getValues());
			}
			reader.close();
			for(int row=0; row<csvList.size(); row++) {
				System.out.print(csvList.get(row)[0] + ",");
				System.out.print(csvList.get(row)[1] + ",");
				System.out.println(csvList.get(row)[2] + ",");
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

Output:

name,age,address,

Alic,18,Shanghai,

(2) Write Data from Java To CSV File

package com.beginner.examples;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class WriteCSV {

	public static void main(String[] args) {

		try {
			File csv = new File("E:tmptest.csv");
			BufferedWriter writer = new BufferedWriter(new FileWriter(csv, true));
			writer.write(""Bob"" + "," + ""2000"" + "," + ""2004"");
			writer.newLine();
			writer.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

References

Imported packages in Java documentation: