java中如何复制一个文件呢？

实现思路:
   使用Files.copy()方法即可实现复制文件的效果

package com.java265.test;
import java.io.IOException;
import java.nio.file.*;

public class NioFileCopyDemo {
    public static void main(String[] args) { 
        Path source = Paths.get("D:/test/log.txt");
        Path target = Paths.get("D:/test/log.bak");
 
        CopyOption[] options = new CopyOption[]{
                StandardCopyOption.replace_EXISTING,
                StandardCopyOption.COPY_ATTRIBUTES
        };

        try { 
            Files.copy(source, target, options);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}