从绝对路径的集合还原成树形目录结构

1. 流程表格

步骤 描述
1 遍历所有绝对路径
2 将每个绝对路径拆分成目录和文件名
3 根据目录结构构建树形结构
4 输出树形目录结构

2. 具体步骤及代码

步骤1：遍历所有绝对路径

List<String> absolutePaths = Arrays.asList("/root/folder1/file1.txt", "/root/folder2/subfolder/file2.txt");

步骤2：拆分路径

Map<String, Map<String, List<String>>> directoryStructure = new HashMap<>();

for (String path : absolutePaths) {
    String[] parts = path.split("/");
    String fileName = parts[parts.length - 1];
    String directory = String.join("/", Arrays.copyOfRange(parts, 0, parts.length - 1));

    if (!directoryStructure.containsKey(directory)) {
        directoryStructure.put(directory, new HashMap<>());
    }

    Map<String, List<String>> directoryContents = directoryStructure.get(directory);
    if (!directoryContents.containsKey("files")) {
        directoryContents.put("files", new ArrayList<>());
    }

    directoryContents.get("files").add(fileName);
}

步骤3：构建树形结构

class Node {
    String name;
    Map<String, Node> children;
    
    public Node(String name) {
        this.name = name;
        this.children = new HashMap<>();
    }
}

Node root = new Node("");

for (String directory : directoryStructure.keySet()) {
    String[] parts = directory.split("/");
    Node current = root;
    
    for (String part : parts) {
        if (!current.children.containsKey(part)) {
            current.children.put(part, new Node(part));
        }
        current = current.children.get(part);
    }
    
    current.children.putAll(directoryStructure.get(directory));
}

步骤4：输出树形结构

public void printTree(Node node, String indent) {
    System.out.println(indent + node.name + "/");
    
    for (Node child : node.children.values()) {
        printTree(child, indent + "  ");
    }
}

printTree(root, "");

3. 类图

classDiagram
    Node <|-- Main
    class Node {
        String name
        Map<String, Node> children
        Node(name)
    }
    class Main {
        List<String> absolutePaths
        Map<String, Map<String, List<String>>> directoryStructure
        Node root
        printTree(Node node, String indent)
    }

4. 旅行图

journey
    title 绝对路径集合还原成树形目录结构之旅

    section 准备工作
        Main 初始化数据

    section 开始构建
        Main 遍历绝对路径
        Main 拆分路径
        Main 构建树形结构

    section 完成
        Main 输出树形结构

通过以上步骤和代码，你可以实现将绝对路径的集合还原成树形目录结构。希望这篇文章对你有所帮助，如果有任何疑问，欢迎继续提问。祝你学习顺利！