File Delete With FileVisitor - Java File Path IO

Java examples for File Path IO:File Visitor

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Description

File Delete With FileVisitor

Demo Code

import java.io.IOException;
import java.nio.file.FileVisitOption;
import java.nio.file.FileVisitResult;
import java.nio.file.FileVisitor;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.EnumSet;

class DeleteDirectory implements FileVisitor<Object> {
  boolean deleteFileByFile(Path file) throws IOException {
    return Files.deleteIfExists(file);
  }/*  w  w w .jav a 2s .  c  om*/

  @Override
  public FileVisitResult postVisitDirectory(Object dir, IOException exc)
      throws IOException {

    if (exc == null) {
      System.out.println("Visited: " + (Path) dir);

      boolean success = deleteFileByFile((Path) dir);

      if (success) {
        System.out.println("Deleted: " + (Path) dir);
      } else {
        System.out.println("Not deleted: " + (Path) dir);
      }
    } else {
      throw exc;
    }
    return FileVisitResult.CONTINUE;
  }
  @Override
  public FileVisitResult preVisitDirectory(Object dir, BasicFileAttributes attrs)
      throws IOException {
    return FileVisitResult.CONTINUE;
  }

  @Override
  public FileVisitResult visitFile(Object file, BasicFileAttributes attrs)
      throws IOException {
    boolean success = deleteFileByFile((Path) file);
    if (success) {
      System.out.println("Deleted: " + (Path) file);
    } else {
      System.out.println("Not deleted: " + (Path) file);
    }
    return FileVisitResult.CONTINUE;
  }

  @Override
  public FileVisitResult visitFileFailed(Object file, IOException exc)
      throws IOException {
    return FileVisitResult.CONTINUE;
  }
}

class Main {
  public static void main(String[] args) throws IOException {
    Path directory = Paths.get("C:/folder1");
    DeleteDirectory walk = new DeleteDirectory();
    EnumSet opts = EnumSet.of(FileVisitOption.FOLLOW_LINKS);
    Files.walkFileTree(directory, opts, Integer.MAX_VALUE, walk);
  }
}

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