copyfiledemo.java

来自「java 教程相应的代码 全是自己写的内附注释 很容易看明白的」· Java 代码 · 共 45 行

package demo.chapter.file;

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

public class CopyFileDemo {

	public static void main(String[] args) {
		try {
			Scanner scan = new Scanner(System.in);
			
			System.out.println("请输入源文件:");
			String src = scan.nextLine();
			System.out.println("请输入目标文件:");
			String dest = scan.nextLine();
			
			BufferedInputStream input = 
				new BufferedInputStream(
						new FileInputStream(src));
			BufferedOutputStream output = 
				new BufferedOutputStream(
						new FileOutputStream(dest));
			
			while(true) {
				int len = input.read();
				if (len == -1)
					break;
                output.write(len);
            }
			// output.flush(); 在close()方法里帮我们做了flush
            output.close();
            input.close();
            
			System.out.println("复制完成");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}