读取.txt文件并转换为.csv文件

Question

Having trouble converting data from a .txt file into a .csv file. Everything runs pretty clean but when it converts to the .csv file it only displays partial data from the .txt file. .txt file is input.txt Here's what I have:

import java.util.Scanner;
import java.io.*;
import com.csvreader.CsvWriter;

public class InputOutputExample
{

public static void main(String[] args) throws IOException 
{

Scanner keyboard = new Scanner(System.in);

    System.out.println("Enter the name and file type: ");
    String filename = keyboard.nextLine();

    File file = new File(filename);
    Scanner inputFile = new Scanner(file);

    while (inputFile.hasNext()) {
        String studentInfo = inputFile.nextLine();

        System.out.println(studentInfo);

        CsvWriter outputFile = new CsvWriter("C:\\Users\\John\\Desktop\\output.csv");
        outputFile.write(studentInfo);
        outputFile.close();

    }



    inputFile.close();

}

}

Output in Java Program:

Enter the name and file type: 
input.txt [Enter]

Student_Id, student_name, gender, grade

993541, Ricky, male, A
037832, Joanne, female, A
034442, Amanda, female, B
054335, Logan, male, B
042343, Paul, male, B

Process finished with exit code 0

When converted to .csv it only displays 42343, Paul, male, B in the cells

Answer 1

You should remove csv file creating out of while loop:

CsvWriter outputFile = new CsvWriter("C:\\Users\\John\\Desktop\\output.csv");

while (inputFile.hasNext()) {
    String studentInfo = inputFile.nextLine();
    System.out.println(studentInfo);
    outputFile.write(studentInfo);
    outputFile.newLine();
}

outputFile.close();

Answer 2

You should extract CsvWriter outputFile = new CsvWriter("C:\\\\Users\\\\John\\\\Desktop\\\\output.csv"); from while loop and outputFile.close(); also. The code should be like this:

`CsvWriter outputFile = new CsvWriter("C:\\Users\\John\\Desktop\\output.csv"); while (inputFile.hasNext()) { String studentInfo = inputFile.nextLine();

    System.out.println(studentInfo);

    outputFile.write(studentInfo);
}

outputFile.close();`

Try with above code replacement