使用流复制文件

package file2;

import java.io.FileInputStream;
import java.io.FileOutputStream;


public class FileCopy {
    public static void main(String[] args) {
        //铺设管道
        try {
            FileInputStream fis = new FileInputStream("D:\\20200415.txt");
            //创建一个程序通往盘符的管道
            FileOutputStream fos = new FileOutputStream("D:\\eclipseWork\\20200415.txt");
            //开水龙头
            int ch = 0;
            while((ch = fis.read())!=-1){
                fos.write(ch);    
            }
            //关水龙头
            fis.close();
            fos.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            System.out.println("文件找不到");
        }
        
    }

}