从 SpringBoot 中的 API 获取特定的响应值

Question

我正在拨打一个电话并收到如下回复：

现在我想获取访问令牌的值并执行一些逻辑。如何从响应中获取价值？任何人都可以请帮忙。 API的服务代码。

public String getToken(User user) throws JsonMappingException, JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();
        System.out.println(clientId+clientPass);
        String plainCreds = clientId+":"+clientPass;
        byte[] plainCredsBytes = plainCreds.getBytes();
        byte[] base64CredsBytes = Base64.getEncoder().encode(plainCredsBytes);
        String base64Creds = new String(base64CredsBytes);
        HttpHeaders headers = new HttpHeaders();
        headers.add("Authorization", "Basic " + base64Creds);
        HttpEntity<String> request=new HttpEntity<String>(headers);
        String uri = url+ user.getUser_id()
                + "&password=" + user.getPassword();
        RestTemplate restTemplate = new RestTemplate();
        
        ResponseEntity<String> result = restTemplate.exchange(uri, HttpMethod.POST, request, String.class) ;
        JsonNode newNode = mapper.readTree(result.getBody());
        ObjectNode node = ((ObjectNode) newNode).put("Authentication", "Successful");
        
        return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(node);
    }

Answer 1

我能够弄清楚。 我用过

node.get("access_token")

它成功了！

Answer 2

你可以写 DTO 来响应：

public class ResponseSample {
   @JsonProperty("access_token")
   String accessToken;
   ....
}

（或反序列化为 Map） 而是打电话给ResponseEntity<String> result = restTemplate.exchange(...) 你可以打电话

ResponseEntity<ResponseSample> result = restTemplate.exchange(..., ResponseSample.class)