import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVParser;
import org.apache.commons.csv.CSVRecord;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
public class CSVReader {
public static void main(String[] args) {
try (Reader reader = new FileReader("data.csv");
CSVParser csvParser = new CSVParser(reader, CSVFormat.DEFAULT)) {
for (CSVRecord csvRecord : csvParser) {
String name = csvRecord.get(0);
int age = Integer.parseInt(csvRecord.get(1));
String city = csvRecord.get(2);
Person person = new Person(name, age, city);
System.out.println(person);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
class Person {
private String name;
private int age;
private String city;
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age=" + age +
", city='" + city + '\'' +
'}';
}
}
import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVPrinter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
public class CSVWriter {
public static void main(String[] args) {
try (Writer writer = new FileWriter("output.csv");
CSVPrinter csvPrinter = new CSVPrinter(writer, CSVFormat.DEFAULT)) {
List<Person> persons = new ArrayList<>();
persons.add(new Person("Alice", 25, "New York"));
persons.add(new Person("Bob", 30, "San Francisco"));
for (Person person : persons) {
csvPrinter.printRecord(person.getName(), person.getAge(), person.getCity());
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVParser;
import org.apache.commons.csv.CSVRecord;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
public class CustomCSVReader {
public static void main(String[] args) {
try (Reader reader = new FileReader("data.csv");
CSVParser csvParser = new CSVParser(reader, CSVFormat.DEFAULT
for (CSVRecord csvRecord : csvParser) {
String name = csvRecord.get(0);
int age = Integer.parseInt(csvRecord.get(1));
System.out.println("Name: " + name);
System.out.println("Age: " + age);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
