Question

无法将.txt文件中的数据转换为.csv文件。一切都运行得非常干净，但当它转换为.csv文件时，它只显示.txt文件中的部分数据。 .txt文件是input.txt 这就是我所拥有的：

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();

}

}

Java程序中的输出：

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

转换为.csv时，它只在单元格中显示42343, Paul, male, B

Answer 1

你应该删除创建out while循环的csv文件：

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

您应该从while循环和CsvWriter outputFile = new CsvWriter("C:\\Users\\John\\Desktop\\output.csv");中提取outputFile.close();。代码应该是这样的：

`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（）;`

尝试使用上面的代码替换

读取.txt文件并转换为.csv文件

2 个答案: