java Files.copy(Path,Path) 是否创建目录？
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Does Files.copy(Path,Path) create directories?
提问by knowads
I have a bunch of text files(say ss1.txt,ss2.txt,ss3.txt etc.) under a directory with my Java program (C:/Users/java/dir1)?
I want to move my txt files to a new directory that hasn't been created yet. I have a String address for all of my files and I think I can turn them into Paths using
我的 Java 程序 ( C:/Users/java/dir1)目录下有一堆文本文件（比如 ss1.txt、ss2.txt、ss3.txt 等）？
我想将我的 txt 文件移动到尚未创建的新目录中。我的所有文件都有一个字符串地址，我想我可以使用
Path path = Paths.get(textPath);
路径路径 = Paths.get(textPath);
Would creating a String (C:/Users/java/dir2), turning that into a path using the above method and then using
将创建一个字符串（C:/Users/java/dir2），使用上述方法将其转换为路径，然后使用
Files.copy(C:/Users/java/dir1/ss1.txt,C:/Users/java/dir2)
Files.copy(C:/Users/java/dir1/ss1.txt,C:/Users/java/dir2)
result in ss1.textbeing copied to a new directory?
结果ss1.text被复制到一个新目录？
采纳答案by Mateusz Sroka
Method Files.copy(C:/Users/java/dir1/ss1.txt,C:/Users/java/dir2)will not create directory, it will create file dir2 in directory java that will contain ss1.txt data.
方法Files.copy(C:/Users/java/dir1/ss1.txt,C:/Users/java/dir2)不会创建目录，它会在包含 ss1.txt 数据的目录 java 中创建文件 dir2。
You could try it with this code:
你可以用这个代码试试：
File sourceFile = new File( "C:/Users/java/dir1/ss1.txt" );
Path sourcePath = sourceFile.toPath();
File destFile = new File( "C:/Users/java/dir2" );
Path destPath = destFile.toPath();
Files.copy( sourcePath, destPath );
Remember use java.nio.file.Files and java.nio.file.Path.
记住使用 java.nio.file.Files 和 java.nio.file.Path。
If you want to use class form java.nio to copy files from one directory to other you should use Files.walkFileTree(...) method. You can see solution here Java: Using nio Files.copy to Move Directory.
如果您想使用类形式 java.nio 将文件从一个目录复制到另一个目录，您应该使用 Files.walkFileTree(...) 方法。您可以在此处查看解决方案Java: Using nio Files.copy to Move Directory。
Or you can simply use `FileUtils class from apache http://commons.apache.org/proper/commons-io/library, available since version 1.2.
或者，您可以简单地使用 apache http://commons.apache.org/proper/commons-io/库中的`FileUtils 类，该类从1.2 版开始可用。
File source = new File("C:/Users/java/dir1");
File dest = new File("C:/Users/java/dir2");
try {
FileUtils.copyDirectory(source, dest);
} catch (IOException e) {
e.printStackTrace();
}
回答by Daniel De León
This is very easy with Files.createDirectories()
这很容易使用Files.createDirectories()
Path source = Path.of("c:/dir/dir-x/file.ext");
Path target = Path.of("c:/target-dir/dir-y/target-file.ext");
Files.createDirectories(target.getParent());
Files.copy(path, target, StandardCopyOption.REPLACE_EXISTING);
And do not worry if the directories already exist, in that case it will do nothing and keep going...
并且不要担心目录是否已经存在，在这种情况下它什么都不做并继续......
