java--录入文件名复制文件

Posted 2020-12-08 雨曼晴川

package com.test;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;

public class test_3 {

public static void main(String[] args) throws IOException  {
	//extracted_6();
	File file = getFile();
	BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
	BufferedOutputStream  bos = new BufferedOutputStream(new FileOutputStream("yyy.txt"));
	int b;
	while((b=bis.read() ) != -1 ) {
		bos.write(b);
	}
	bis.close();
	bos.close();
}
public static File getFile() {
	Scanner sc = new Scanner(System.in);
	System.out.println("请输入一个文件路径");
	while(true) {
		String line = sc.nextLine();
		File file =new File(line);
		if(!file.exists()) {
			System.out.println("您录入的路径不存在，请重新录入");
		}else if(file.isDirectory()) {
			System.out.println("您录入的路径是文件夹，请重新录入");
		}else {
			return file;
		}
	}
}

}