Using the data format conversion, RestTemplate of

Sring turn Json

<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.31</version>
</dependency>

jsonObject = JSONObject.parseObject(resultJson);
jsonArray = jsonObject.getJSONArray("nodes");

InputStream inputStream = GraphController.class.getClassLoader().getResourceAsStream("static/data/" + 文件名称);
FileOperate operate = new FileOperate();
str = operate.convertStreamToString(inputStream);
jsonObject = JSONObject.parseObject(str);
return jsonObject.toJSONString();

RestTemplate use

graphJson = 需要查询的数据.
String url = psp.getBaseUrl() + "/centrality/centrality/";
//初始化模板
RestTemplate restTemplate = new RestTemplate();
//头部信息
HttpHeaders headers = new HttpHeaders();
//设置头部信息
headers.setContentType(MediaType.APPLICATION_JSON);
//初始化Map参数
MultiValueMap<String, String> params = new LinkedMultiValueMap<String, String>();
params.add("code", graphJson);

//header信息和头部信息封装入一个Map中
HttpEntity<MultiValueMap<String, String>> requestEntity 
				= new HttpEntity<MultiValueMap<String, String>>(params, headers);
// 执行HTTP请求
ResponseEntity<String> response = 
			restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class);
// 输出结果
int code = response.getStatusCodeValue();
String resultJson = response.getBody();

json data transfer entity class

com.fasterxml.jackson.databind.ObjectMapper
com.fasterxml.jackson.databind.JavaType


ObjectMapper mapper = new ObjectMapper();
FinalData.class ==需要转化成的 POJO类
//转换成 json到List<POJO>
JavaType javaType = 
	mapper.getTypeFactory().constructCollectionType(ArrayList.class, FinalData.class);
List<FinalData> list =  (List<FinalData>)mapper.readValue(resultJson, javaType);