通過遞迴函式，展示某個檔案下目錄結構

public class DirectorList {
	private static Scanner sc;

	public static void main(String[] args) {
		String route = getRoute();
		File file = new File(normRoute(route));
		System.out.println(file.getName());
		showFile(file, 1);
	}
	
	/*
	 * 利用遞迴遍歷所有子目錄,levels記錄資料夾的層數(控制空格長度,模擬分層效果 )
	 */
	public static void showFile(File files,int levels){
		//獲取所有的檔案列表
		File[] arrFiles = files.listFiles();
		String str = "";
		//每向下延伸一層,檔案前增加一層
		for (int i = 0; i < levels; i++) {
			str += "    ";
		}
		//增強for遍歷檔案陣列
		for (File childFile : arrFiles) {
			System.out.println(str + childFile.getName());
			//如果file是目錄,遞迴呼叫
			if(childFile.isDirectory())
				showFile(childFile, levels + 1);	
		}
	}
	
	//獲取使用者輸入檔案路徑
	public static String getRoute(){
		sc = new Scanner(System.in);
		System.out.println("請輸入檔案的絕對路徑:");
		String route = sc.next();
		return route;
	}
	
	//對使用者輸入的檔案路徑進行分割重新組裝
	public static String normRoute(String str){
		//定義分割符\
		String strSplit = "\\\\";
		String normalSplit = "";
		String[] arrRoute = str.split(strSplit);
		for (String sonRoute : arrRoute) {
			normalSplit  = normalSplit + sonRoute + "\\\\";
		}
		return normalSplit;
	}
}

console:
請輸入檔案的絕對路徑:
D:\foxmail\Global
Global
    7_1.ver
    Address
        3.0
            1
                AddrFolderTreeStg.hea
                AddrFolderTreeStg.htb
                AddrFolderTreeStg.rec0
                AddrNoteIdToEmails
                AddrNoteIdToMainEmailId
                Indexes
                    hitCount.ind
            AddressOption
        Images
            contact.png
    alarm