Java读取本地json文件及相应处理方法

//读取json文件地址  /* String path = getClass().getClassLoader().getResource("menu.json").toString();  path = path.replace("//", "/");  if (path.contains(":")) {   path = path.replace("file:/", "");  }*/  ClassPathResource resource = new ClassPathResource("menu.json");  File filePath = resource.getFile();  JSONArray btnArray = null;  //读取文件  String input = FileUtils.readFileToString(filePath, "UTF-8");  //将读取的数据转换为JSONObject  JSONObject jsonObject = JSONObject.fromObject(input);  if (jsonObject != null) {   //取出按钮权限的数据   btnArray = jsonObject.getJSONArray("btnList");  }  Map<String, List<MenuVo>> btnMap = new HashMap<>();  Iterator<Object> num = btnArray.iterator();  //遍历JSONArray，转换格式。按按钮集合按模块（name）放入map中  while (num.hasNext()) {   JSONObject btn = (JSONObject) num.next();   btnMap.put((String) btn.get("name"), JSONArray.toList((JSONArray) btn.get("children"), new MenuVo(), new JsonConfig()));  }

{ "btnList": [ {  "name": "用户管理",  "children": [  {   "id": "yhgladd",   "name": "添加"  },  {   "id": "yhgledit",   "name": "编辑"  },  {   "id": "yhgldelete",   "name": "暂停"  },  {   "id": "yhglstart",   "name": "启用"  },  {   "id": "yhglsee",   "name": "查看"  }  ] }, {  "name": "角色管理",  "children": [  {   "id": "jsgladd",   "name": "添加"  },  {   "id": "jsgledit",   "name": "编辑"  },  {   "id": "jsglauth",   "name": "授权"  },  {   "id": "jsgldelete",   "name": "删除"  }  ] } ]}