1 需求

需求1：如果目录不存在新建目录；

需求2：如果目录存在，先删除目录，再新建目录； 

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2 接口

• File类
  • mkdir
  • mkdirs
• Files类
  • createDirectories

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3 示例：File类创建目录

import java.io.File;public class Main {public static void main(String[] args) {try {// 创建一个新的File对象File dir = new File("newDirectory");// 如果目录不存在，则创建它if (!dir.exists()) {dir.mkdir();System.out.println("Directory created successfully!");} else {System.out.println("Directory already exists!");}} catch (Exception e) {e.printStackTrace();}}
}

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3.X 示例：Files类创建目录

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;public class DirectoryCreator {public static void main(String[] args) {// 指定要创建的目录的路径Path directoryPath = Paths.get("path/to/new/directory");try {// 创建目录Files.createDirectories(directoryPath);System.out.println("Directory created successfully.");} catch (IOException e) {System.out.println("An error occurred while creating the directory.");e.printStackTrace();}}
}

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4 参考资料