java实验六

package org.example;
import java.io.*;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws IOException {
        String source_filename = "D://Hello.txt";
        String target_filename = "D://Hello.txt";

        System.out.println("请输入源文件地址 ");
        source_filename = ( new Scanner(System.in)).nextLine();
        System.out.println("请输入目标文件地址 ");
        target_filename = ( new Scanner(System.in)).nextLine();


        FileReader fr = new FileReader(source_filename);
        BufferedReader br = new BufferedReader(fr);

        FileWriter fw = new FileWriter(target_filename, true);
        BufferedWriter bw = new BufferedWriter(fw);




        String line;
        while((line = br.readLine())!=null){
            bw.write(line);
            bw.newLine();
            System.out.println(line);
        }

        bw.flush();

        br.close();
        fr.close();
        bw.close();
        fw.close();
    }
}