Java.nio.files - 复制文件

Question

任何人都可以告诉我我在以下代码中做错了什么。我没有收到任何错误 - 它直接进入捕获状态。

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class Main {

    public static void main(String[] args) {
         Path source = Paths.get("C:\\Users\\Public\\Pictures\\SamplePictures");
    Path nwdir = Paths.get("D:\\NetbeansProjects\\CopyingFiles\\copiedImages");

    try{
    Files.copy(source, nwdir);
    }catch (IOException e){
        System.out.println("Unsucessful. What a surprise!");
    }
    }
}

Answer 1

如果你看一下 Files.copy 的 Javadocs ，您会注意到这一行(添加了重点):

If the file is a directory then it creates an empty directory in the target location (entries in the directory are not copied). This method can be used with the walkFileTree method to copy a directory and all entries in the directory, or an entire file-tree where required.

所以看起来您需要使用 walkFileTree 方法。

(正如评论者所说，打印出异常，他们通常会告诉您哪里出了问题!)