Java File相关接口

import java.io.File;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

public class CreateDirAndFileAppMain {
    private static String Root = "F:" + File.separator + "myjava" + File.separator + "lets_java" + File.separator;
    private static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        System.out.println(Root);
        File dir = createDirs();
        File newDir = renameDir(dir);
        if (dir == null) {
            return;
        };

        String fileName = createFile(newDir);
        String newFileName = renameFiles(newDir, fileName);

        deleteFiles(newDir,newFileName);

        deleteDir(newDir);
    }

    private static void deleteDir(File newDir) {
        System.out.println("删除文件夹？");
        boolean deleteDir=sc.nextBoolean();
        if(deleteDir){
            System.out.println("删除文件夹："+newDir.delete());
        }
    }

    private static void deleteFiles(File newDir, String newFileName) {
        System.out.println("是否删除文件");
        boolean deleteFiles=sc.nextBoolean();
        if (deleteFiles){
            for (int i = 0; i < 10; i++) {
                File fn = new File(newDir, newFileName + i + ".txt");
                System.out.println("删除文件"+fn.delete());
            }
        }
    }

    private static String renameFiles(File newDir,String fileName){
        System.out.println("请重新输入名字：");
        String newFileName=sc.nextLine().trim();
        for (int i = 0; i < 10; i++) {
            File f = new File(newDir, fileName + i + ".txt");
            File fn = new File(newDir, newFileName + i + ".txt");
            System.out.println("重命名文件"+f.getName()+":"+f.renameTo(fn));
        }
        return newFileName;
    }

    private static String createFile(File newDir) throws IOException {
        System.out.println("请输入文件名的前缀：");
        String fileName = sc.nextLine().trim();
        for (int i = 0; i < 10; i++) {
            File f = new File(newDir, fileName + i + ".txt");
            System.out.println("创建文件" + f.getName() + ":" + f.createNewFile());
        };
        return fileName;
    }

    private static File renameDir(File dir) {
        System.out.println("请输入新的文件夹的名字：");
        String newDirName = sc.nextLine().trim();
        File newDir = new File(dir.getParentFile(), newDirName);
        boolean renameSuccess = dir.renameTo(newDir);
        if (renameSuccess) {
            System.out.println(dir.getName()+"改名为" + newDirName + "成功");
            return newDir;
        } else {
            System.out.println("改名为"+newDirName+"失败");
            return null;
        }
    }

    private static File createDirs() {
        List<String> pathList = new ArrayList<>();
        while (true){
            System.out.println("请输入路径名，以空格结束:");
            String path = sc.nextLine();
            if (path.isBlank()) {
                break;
            }
            pathList.add(path);
        }
        System.out.println(pathList.toArray(new String[0]));
        return createDir(pathList.toArray(new String[0]));
    }

    private static File createDir(String... restPaths ) {
        String rest = joinRestDir(restPaths);
        System.out.println("将在" + Root + "下创建" + rest);
        File dir =new File(Root,rest);
        if(dir.exists()&& dir.isDirectory()){
            System.out.println("文件夹已经存在"+dir.toString());
            return dir;
        }else {
            boolean createSuccess = dir.mkdirs();
            if(createSuccess){
                return dir;
            }else {
                throw new IllegalArgumentException("无法在"+Root+"下创建"+rest);
            }
        }
    }

    private static String joinRestDir(String... restPaths) {
        return Arrays.stream(restPaths).map(String::trim).collect(Collectors.joining(File.separator));
    }
}