Springboot实现调用接口（使用RestTemplate）

一、在启动类配置RestTemplate

    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }

二、引入json的依赖（获取response body可以用到）

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>

三、依赖注入

    @Autowired
    private RestTemplate restTemplate;
    @Autowired
    private ObjectMapper objectMapper;

四、调接口

	String url = "";
	//设置请求头
	HttpHeaders httpHeaders = new HttpHeaders();
	httpHeaders.add("honeycombToken", "");
	//设置请求体
	HashMap<String, String> map = new HashMap<>();
	map.put("", "");
	map.put("", "");
	// 将请求头和请求体封装到HttpEntity中
	HttpEntity<HashMap<String, String>> hashMapHttpEntity = new HttpEntity<>(map,httpHeaders);
	//发送post请求
	ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.POST, hashMapHttpEntity, String.class);
	// 将返回的JSON字符串解析为JsonNode对象
	JsonNode jsonNode = objectMapper.readTree(response.getBody());
	//获取指定的字段名token
	String token = jsonNode.get("data").get("token").toString();