Writing to a New CSV File

Deepika Sahu answered on December 21, 2021 Popularity 10/10 Helpfulness 1/10

answer Writing to a New CSV File

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Writing to a New CSV File

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import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.supercsv.cellprocessor.Optional;
import org.supercsv.cellprocessor.ParseInt;
import org.supercsv.cellprocessor.ParseLong;
import org.supercsv.cellprocessor.constraint.NotNull;
import org.supercsv.cellprocessor.constraint.StrRegEx;
import org.supercsv.cellprocessor.ift.CellProcessor;
import org.supercsv.io.CsvBeanWriter;
import org.supercsv.io.ICsvBeanWriter;
import org.supercsv.prefs.CsvPreference;

public class WriteCSVFileExample
{
	//Watch out for Exception in thread "main" java.lang.ExceptionInInitializerError
	private static List&lt;Customer&gt; customers = new ArrayList&lt;Customer&gt;();

	static
	{
		customers.add(new Customer(1, "Lokesh", "India", 12345L, "howtodoinjava@gmail.com"));
		customers.add(new Customer(2, "Mukesh", "India", 34234L, "mukesh@gmail.com"));
		customers.add(new Customer(3, "Paul", "USA", 52345345L, "paul@gmail.com"));
	}

	private static CellProcessor[] getProcessors()
	{
		final String emailRegex = "[a-z0-9\\._]+@[a-z0-9\\.]+";

		StrRegEx.registerMessage(emailRegex, "must be a valid email address");

		final CellProcessor[] processors = new CellProcessor[] {
				new NotNull(new ParseInt()), // CustomerId
				new NotNull(), // CustomerName
				new NotNull(), // Country
				new Optional(new ParseLong()), // PinCode
				new StrRegEx(emailRegex) // Email
		};
		return processors;
	}

	public static void main(String[] args)
	{

		ICsvBeanWriter beanWriter = null;

		try
		{
			beanWriter = new CsvBeanWriter(new FileWriter("temp.csv"), CsvPreference.STANDARD_PREFERENCE);
			final String[] header = new String[] { "CustomerId", "CustomerName", "Country", "PinCode" ,"Email" };

			final CellProcessor[] processors = getProcessors();

			// write the header
			beanWriter.writeHeader(header);

			// write the beans data
			for (Customer c : customers) {
				beanWriter.write(c, header, processors);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}  finally {
			try {
				beanWriter.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}

Popularity 10/10 Helpfulness 1/10 Language java

Source: howtodoinjava.com

Tags: csv file java

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Contributed on Dec 30 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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python writing to csv file

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import csv  

header = ['name', 'area', 'country_code2', 'country_code3']
data = ['Afghanistan', 652090, 'AF', 'AFG']

with open('countries.csv', 'w', encoding='UTF8') as f:
    writer = csv.writer(f)

    # write the header
    writer.writerow(header)

    # write the data
    writer.writerow(data)

Popularity 10/10 Helpfulness 6/10 Language python

Source: www.pythontutorial.net

Tags: csv

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Contributed on Dec 21 2021

Colorful Copperhead

0 Answers Avg Quality 2/10

Writing into a CSV File

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import com.opencsv.CSVWriter;
import java.io.FileWriter;
import java.net.URL;

public class WritingCSVFileExample {

  public static void main(String[] args) throws Exception {
    URL fileUrl = WritingCSVFileExample.class.getClassLoader().getResource("data.csv");

    CSVWriter writer = new CSVWriter(new FileWriter(fileUrl.getFile()));

    //Create record
    String[] record = "2,Rahul,Vaidya,India,35".split(",");

    //Write the record to file
    writer.writeNext(record, false);

    //close the writer
    writer.close();
  }
}

Popularity 9/10 Helpfulness 1/10 Language java

Source: howtodoinjava.com

Tags: csv

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Contributed on Dec 30 2022

Deepika Sahu

0 Answers Avg Quality 2/10

wat doet write.csv

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# Voorbeeld dataframe
my_data <- data.frame(
  Name = c("John", "Alice", "Bob"),
  Age = c(30, 25, 35),
  Gender = c("Male", "Female", "Male")
)

# Bekijk het dataframe
print(my_data)

Popularity 3/10 Helpfulness 1/10 Language whatever

Source: chat.openai.com

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Contributed on Mar 28 2024

Leon Geldhof

0 Answers Avg Quality 2/10

wat doet write.csv

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Name Age Gender
1  John  30   Male
2 Alice  25 Female
3   Bob  35   Male

Popularity 3/10 Helpfulness 1/10 Language whatever

Source: chat.openai.com

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Contributed on Mar 28 2024

Leon Geldhof

0 Answers Avg Quality 2/10

Writing to a New CSV File

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