项目中需要访问别的项目的接口，利用其返回的数据进行操作。
记录一下如何将http中的response中的data取出使用。

        RestTemplate restTemplate = new RestTemplate();
        //发送请求并接收数据
        ResponseEntity<String> responseEntity = restTemplate.postForEntity("http://" + ip + ":" + port + "/api/resource/v1/regions/root", generatePostJson(new HashMap<>()), String.class);
        //将Rest结果转换为Map
        Map<String, Object> body = JSONObject.parseObject(responseEntity.getBody());
        List<Map<String, Object>> dataList = new ArrayList<>();
        //接收response body
        Object obj;
        if(body != null) {
            obj = body.get("data");
        } else {
            throw new Exception("请求返回空response body");
        }
        //将response body中的data转换为List
        if(obj instanceof List<?>) {
            for(Object o : (List<?>) obj) {
                dataList.add(Map.class.cast(o));
            }
        }
        //遍历List中的Map
        for(Map<String, Object> data : dataList) {
            logger.info("name: " + data.get("name"));
            logger.info("indexCode: " + data.get("indexCode"));
            logger.info("treeCode: " + data.get("treeCode"));
            logger.info("parentIndexCode: " + data.get("parentIndexCode"));
        }

输出结果：

name: 根节点
indexCode: aaabbbccc1111
treeCode: 1
parentIndexCode: -1

解决~