复制文件

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

public class CopyFileDemo {
    public static void main(String[] args) {
        try(
                FileInputStream fis=new FileInputStream("E:\\abc\\xxx\\1.png");
                FileOutputStream fos=new FileOutputStream("E:\\abc\\xxx\\2.png");
        )
        {
            int len=0;
            byte[] bytes=new byte[1024];
            while((len=fis.read(bytes))!=-1){
                //System.out.println(len);
                fos.write(bytes,0,len);
            }

        }catch(IOException e){
            System.out.println(e);
        }

    }
}