创建目录.如果存在,删除目录及其内容并在Java中创建新目录

Question

我正在尝试用Java创建一个目录.如果它存在,我想删除该目录及其内容并创建一个新目录.我试图执行以下操作,但不删除该目录.新文件将附加到目录中.

File file = new File("path");
boolean isDirectoryCreated = file.mkdir();
   if (isDirectoryCreated) {
       System.out.println("successfully made");
        } else {
          file.delete();
          file.mkdir();
          System.out.println("deleted and made");
          }

我在运行时在正在运行的项目的目录中创建此目录.每次运行后,必须删除旧内容,并且必须在此目录中显示新内容.

Answer 1

感谢Apache,这非常简单.

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;

public class DeleteFolder {

    public static void main(String[] args){
        try {
            File f = new File("/var/www/html/testFolder1");
            FileUtils.cleanDirectory(f); //clean out directory (this is optional -- but good know)
            FileUtils.forceDelete(f); //delete directory
            FileUtils.forceMkdir(f); //create directory
        } catch (IOException e) {
            e.printStackTrace();
        } 
    }

}

Answer 2

public static boolean deleteDir(File dir) {
    if (dir.isDirectory()) {
        String[] children = dir.list();
        for (int i=0; i<children.length; i++) {
            boolean success = deleteDir(new File(dir, children[i]));
            if (!success) {
                return false;
            }
        }
    }
    return dir.delete();
}

Answer 3

你需要先删除目录的内容,然后才能删除目录..你可以尝试这样的事情: -

File file = new File("path");
boolean isDirectoryCreated = file.mkdir();

if (isDirectoryCreated) {
       System.out.println("successfully made");

} else {
       deleteDir(file);  // Invoke recursive method
       file.mkdir();       
}


public void deleteDir(File dir) {
    File[] files = dir.listFiles();

    for (File myFile: files) {
        if (myFile.isDirectory()) {  
            deleteDir(myFile);
        } 
        myFile.delete();

    }
}