初始是這樣的：

@PostMapping("/parentId")
public Result listByParentId(@RequestBody Map<String,String> map) {
    String regionId = map.get("regionId");
    //獲取使用者有許可權檢視的車站ID集合
    Set<String> stationIds = this.getStationIds();
    List<String> ids = new ArrayList<>(stationIds);
    return Result.ok(stationRegionTreeService.listByParent(regionId, ids));
}

返回的資料的格式為：
 

     }
    ]
}

修改後：

    @GetMapping("/parentId")
public Result listByParentId(String regionId) {
        Set<String> stationIds = this.getStationIds();
        List<String> ids = new ArrayList<>(stationIds);
        List<StationRegionTree> stationRegionTrees = stationRegionTreeService.listByParent(regionId, ids);
        HashMap<Object, List<StationRegionTree>> map = new HashMap<>();
        map.put("content",stationRegionTrees);
        return Result.ok(map);
    }
 

}