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.nio.charset.StandardCharsets;
public class CSVParserExample {
public static void main(String[] args) {
String csvFile = "data.csv";
try (FileReader fileReader = new FileReader(csvFile, StandardCharsets.UTF_8);
CSVParser csvParser = new CSVParser(fileReader, CSVFormat.DEFAULT)) {
for (CSVRecord csvRecord : csvParser) {
String name = csvRecord.get(0);
String email = csvRecord.get(1);
}
} 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.nio.charset.StandardCharsets;
public class CSVValidatorExample {
public static void main(String[] args) {
String csvFile = "data.csv";
try (FileReader fileReader = new FileReader(csvFile, StandardCharsets.UTF_8);
CSVParser csvParser = new CSVParser(fileReader, CSVFormat.DEFAULT)) {
for (CSVRecord csvRecord : csvParser) {
String name = csvRecord.get(0);
String email = csvRecord.get(1);
boolean valid = validate(name, email);
if (!valid) {
System.out.println("Invalid record: " + csvRecord.toString());
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
private static boolean validate(String name, String email) {
return email.matches("[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}");
}
}
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.FileWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
public class CSVValidatorResultProcessor {
public static void main(String[] args) {
String csvFile = "data.csv";
String resultFile = "validation_result.csv";
try (FileReader fileReader = new FileReader(csvFile, StandardCharsets.UTF_8);
CSVParser csvParser = new CSVParser(fileReader, CSVFormat.DEFAULT);
FileWriter fileWriter = new FileWriter(resultFile)) {
for (CSVRecord csvRecord : csvParser) {
String name = csvRecord.get(0);
String email = csvRecord.get(1);
boolean valid = validate(name, email);
if (!valid) {
String invalidRecord = csvRecord.toString();
fileWriter.append(invalidRecord);
fileWriter.append("
");
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
private static boolean validate(String name, String email) {
}
}
