使用 Java 删除文件

原文:https://www.geeksforgeeks.org/delete-file-using-java/

java 提供了使用 Java 程序删除文件的方法。与任何操作系统中的正常删除操作相反，使用 java 程序删除的文件将被永久删除，而不会被移动到废纸篓/回收站。 以下是用 Java 删除文件的方法:

  1. Using java.io.File.delete() function: Deletes the file or directory denoted by this abstract path name. Syntax:

    java public boolean delete() Returns: true if and only if the file or directory is successfully deleted; false otherwise

    ```java // Java program to delete a file  import java.io.*;

    public class Test {     public static void main(String[] args)     {         File file = new File("C:\Users\Mayank\Desktop\1.txt");

    if(file.delete())         {             System.out.println("File deleted successfully");         }         else         {             System.out.println("Failed to delete the file");         }     } } ```

    输出:

    java File deleted successfully

  2. 使用在 files 包中定义的 Java . nio . file . Files . deleteifexists(Path p)方法:该方法删除存在的文件。只有当目录不为空时，它才会删除路径中提到的目录。 语法:

public static boolean deleteIfExists(Path path) throws IOException
Parameters: path - the path to the file to delete
Returns: true if the file was deleted by this method; 
false if the file could not be deleted because it did not exist.
Throws: 
DirectoryNotEmptyException - if the file is a directory and 
could not otherwise be deleted because the directory is not empty
(optional specific exception)
IOException - if an I/O error occurs

// Java program to demonstrate delete using Files class
import java.io.IOException;
import java.nio.file.*;

public class Test
{
    public static void main(String[] args)
    {
        try
        {
            Files.deleteIfExists(Paths.get("C:\\Users\\Mayank\\Desktop\\
            445.txt"));
        }
        catch(NoSuchFileException e)
        {
            System.out.println("No such file/directory exists");
        }
        catch(DirectoryNotEmptyException e)
        {
            System.out.println("Directory is not empty.");
        }
        catch(IOException e)
        {
            System.out.println("Invalid permissions.");
        }

        System.out.println("Deletion successful.");
    }
}

输出:

Deletion successful.

参考:

  • Oracle

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