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How to delete a directory recursively with all its subdirectories and files in Java

In this short article, you’ll learn how to delete a directory recursively along with all its subdirectories and files.

There are two examples that demonstrate how to achieve this task. The idea behind both of the examples is to traverse the file tree, and delete the files in any directory before deleting the directory itself.

Delete directory recursively - Java 8+

This example makes use of Files.walk(Path) method that returns a Stream<Path> populated with Path objects by walking the file-tree in depth-first order.

package com.baeldung;

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

public class DeleteDirectoryRecursively {

    public static void main(String[] args) throws IOException {
        
        Path dir = Paths.get("java");

        // Traverse the file tree in depth-first fashion and delete each file/directory
        Files.walk(dir)
                .sorted(Comparator.reverseOrder())
                .forEach(path -> {
                    try {
                        System.out.println("Deleting : " + path);
                        Files.delete(path);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                });
    }
}

Delete directory recursively - Java 7

The following example uses Files.walkFileTree(Path, FileVisitor) method that traverses a file tree and invokes the supplied FileVisitor for each file.

We use a SimpleFileVisitor to perform the delete operation.

package com.zetcode;

import java.io.IOException;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;

public class DeleteDirectoryRecursively {

    public static void main(String[] args) throws IOException {
        Path dir = Paths.get("java");

        // Traverse the file tree and delete each file/directory.
        Files.walkFileTree(dir, new SimpleFileVisitor<Path>() {
            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                System.out.println("Deleting file: " + file);
                Files.delete(file);
                return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
                System.out.println("Deleting dir: " + dir);
                if (exc == null) {
                    Files.delete(dir);
                    return FileVisitResult.CONTINUE;
                } else {
                    throw exc;
                }
            }
        });
    }
}

Delete Directory Recursively

标签：main   package   assets   OWIN   let   method   ever   print   example   

原文地址：https://www.cnblogs.com/PrimerPlus/p/13098826.html