从一个文本文件中获取数据并将其移至新的文本文件 [英] Taking data from one text file and moving it to a new text file

问题描述

我有一个文件，里面有数据.在我的主要方法中，我读取了文件并关闭了文件.我调用另一个在原始文件的同一文件夹内创建新文件的方法.所以现在我有两个文件，原始文件和从我调用的方法生成的文件.我需要另一种方法，该方法将从原始文件中获取数据并将其写入创建的新文件中.我该怎么办?

I have a file that has data inside of it. In my main method I read in the file and closed the file. I call another method that created a new file inside of the same folder of the original file. So now I have two files, the original file and the file that is being made from the method that I call. I need another method that takes the data from the original file and writes it to the new file that is created. How do I do that?

import java.io.*;
import java.util.Scanner;
import java.util.*;
import java.lang.*;

public class alice {

    public static void main(String[] args) throws FileNotFoundException {
        String filename = ("/Users/DAndre/Desktop/Alice/wonder1.txt");
        File textFile = new File(filename);
        Scanner in = new Scanner(textFile);
        in.close();
        newFile();
    }

    public static void newFile() {
        final Formatter x;
        try {
            x = new Formatter("/Users/DAndre/Desktop/Alice/new1.text");
            System.out.println("you created a new file");
        } catch (Exception e) {
            System.out.println("Did not work");
        }
    }

    private static void newData() {
    }

}

推荐答案

如果您的要求是将原始文件内容复制到新文件中.那么这可能是一个解决方案.

If your requirement is to copy your original files content to new file. Then this may be a solution.

解决方案:

首先，使用BufferedReader读取原始文件，然后将内容传递给使用PrintWriter创建新文件的另一种方法.并将您的内容添加到新文件中.

First, read to your original file using BufferedReader and pass your content to another method which creates new file using PrintWriter. and add your content to your new file.

示例:

public class CopyFile {

  public static void main(String[] args) throws FileNotFoundException, IOException {
    String fileName = ("C:\\Users\\yubaraj\\Desktop\\wonder1.txt");
    BufferedReader br = new BufferedReader(new FileReader(fileName));
    try {
        StringBuilder stringBuilder = new StringBuilder();
        String line = br.readLine();

        while (line != null) {
            stringBuilder.append(line);
            stringBuilder.append("\n");
            line = br.readLine();
        }
        /**
         * Pass original file content as string to another method which
         * creates new file with same content.
         */
        newFile(stringBuilder.toString());
    } finally {
        br.close();
    }

  }

  public static void newFile(String fileContent) {
    try {
        String newFileLocation = "C:\\Users\\yubaraj\\Desktop\\new1.txt";
        PrintWriter writer = new PrintWriter(newFileLocation);
        writer.write(fileContent);//Writes original file content into new file
        writer.close();
        System.out.println("File Created");
    } catch (Exception e) {
        e.printStackTrace();
    }
  }
}

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