Java 8：从文件夹/子文件夹中获取文件
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Java 8 : Get files from folder / subfolder
提问by Nu?ito de la Calzada
I have this folders inside the resources folder of a SpringBootapp.
我在SpringBoot应用程序的资源文件夹中有这个文件夹。
resources/files/a.txt
resources/files/b/b1.txt
resources/files/b/b2.txt
resources/files/c/c1.txt
resources/files/c/c2.txt
I want to get all the txt file, so this is my code:
我想得到所有的txt文件，所以这是我的代码：
ClassLoader classLoader = this.getClass().getClassLoader();
Path configFilePath = Paths.get(classLoader.getResource("files").toURI());
List<Path> atrackFileNames = Files.list(configFilePath)
.filter(s -> s.toString().endsWith(".txt"))
.map(Path::getFileName)
.sorted()
.collect(toList());
But I only get the file a.txt
但我只得到文件a.txt
采纳答案by Eugene
Path configFilePath = FileSystems.getDefault()
.getPath("C:\Users\sharmaat\Desktop\issue\stores");
List<Path> fileWithName = Files.walk(configFilePath)
.filter(s -> s.toString().endsWith(".java"))
.map(Path::getFileName).sorted().collect(Collectors.toList());
for (Path name : fileWithName) {
// printing the name of file in every sub folder
System.out.println(name);
}
回答by Dumbo
Files.list(path)method returns only stream of files in directory. And the method listing is not recursive.
Instead of that you should use Files.walk(path). This method walks through all file tree rooted at a given starting directory.
More about it:
https://docs.oracle.com/javase/8/docs/api/java/nio/file/Files.html#walk-java.nio.file.Path-java.nio.file.FileVisitOption...-
Files.list(path)方法只返回目录中的文件流。并且方法列表不是递归的。
相反，您应该使用Files.walk(path). 此方法遍历以给定起始目录为根的所有文件树。
更多相关信息：https:
//docs.oracle.com/javase/8/docs/api/java/nio/file/Files.html#walk-java.nio.file.Path-java.nio.file.FileVisitOption。 ..-
