Java 从Hashmap中格式化JSON

我的问题是我有一个Hashmap来建立文件系统的层次结构。键是文件或文件夹的名称，以及层次结构中更深层次的文件的值哈希映射

Hashmap
├── Key : Name of the File (eg. root)
└── Value : Deeper Files
    ├── Hashmap File 1
    │    ├── Key : Name of the File
    │    └── Value : Deeper Files
    └── Hashmap File 2
         ├── ....

现在，我尝试将Gson的漂亮格式映射为JSON：

      {
      "": {
        "src": {
          "main": {
            "java": {
              "tools": {
                "mockfile": {
                  "generator": {
                    "data": {
                      "RecordPart.java": {},
                      "RecordAll.java": {}
                    },
                    "AnalyzerTEST.java": {},
                    "AnalyzerSFTP.java": {}
                  }
 ...

但对于我的应用程序，我需要以下格式：

    {
     "name": "",
     "children": [
      {
       "name": "src",
       "children": [
        {
         "name": "main",
         "children": [
            {
             "name": "tools",
             "children": [
                {
                 "name": "generator",
                 "children": [
                    {
                     "name": "data",
                     "children": [
                        {"name": "RecordTotal.java"},
                        {"name": "RecordAll.java"}
                     ]
                    },
                    {"name": "AnalyzerTEST.java"},
                    {"name": "AnalyzerSFTP.java"}
                 ]
                }
 ...

---

有没有办法用我的Hashmap解决这个问题

假设我们有DTO

public class Data {
    private String name;
    private Data[] children;

    public Data(String name, Data[] children) {
        this.name = name;
        this.children = children;
    }
}

您需要将HashMap转换为DTO数据数组

以下是我们如何使用此方法：

HashMap<String, HashMap> map = // You already have that
Data[] data = convertMap2Data(map);

Gson gson = new GsonBuilder().setPrettyPrinting().create();
System.out.println(gson.toJson(data[0])); // If there is only one root use this
//System.out.println(gson.toJson(data));  // If there are multiple root

HashMap<String, HashMap> map = // You already have that
Data[] data = convertMap2Data(map);

Gson gson = new GsonBuilder().setPrettyPrinting().create();
System.out.println(gson.toJson(data[0])); // If there is only one root use this
//System.out.println(gson.toJson(data));  // If there are multiple root