Resttemplate android: RestClientException:无法提取响应:找不到合适的HttpMessageConverter
Resttemplate android: RestClientException:无法提取响应:找不到合适的HttpMessageConverter
提问于 2013-01-23 18:06:41
我使用Androd resttemplate和MappingJacksonHttpMessageConverter。对于某些urls，交换工作得很好，但其中一个会导致异常。Resttemplate的实例化
restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());
rootUrl = "http://someserver.com"和交换功能：
public Questions loadQuestQuestions(int quest_id, String token) {
HashMap<String, Object> urlVariables = new HashMap<String, Object>();
urlVariables.put("quest_id", quest_id);
urlVariables.put("token", token);
HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.setAccept(Collections.singletonList(MediaType.parseMediaType("application/json")));
HttpEntity<Object> requestEntity = new HttpEntity<Object>(httpHeaders);
return restTemplate.exchange(rootUrl.concat("/tasks/{quest_id}/questions?token={token}"), HttpMethod.GET, requestEntity, Questions.class, urlVariables).getBody();
}问题-
import org.codehaus.jackson.map.annotate.JsonRootName;
import java.util.LinkedList;
/**
* Wrapper for collection
*/
@JsonRootName(value = "questions")
public class Questions extends LinkedList<Question> {
}包含所有需要的注解的Question，包括@JsonRootName
Json通信有内容类型'application/json‘，一切正常，最近运行良好。但是抛出了异常：org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [Questions] and content type [application/json;charset=utf-8]
Stack Overflow用户
发布于 2013-02-18 10:49:51
我看不出你的代码有什么问题。Spring3.2.x添加了使用Jackson 2- MappingJackson2HttpMessageConverter的转换器。也许你可以试试这个转换器。这解决了我过去遇到的类似问题。确保您的POJO有Jackson 2注释。希望这对你有帮助。
RestTemplate template = new RestTemplate();
List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
MappingJackson2HttpMessageConverter map = new MappingJackson2HttpMessageConverter();
messageConverters.add(map);
template.setMessageConverters(messageConverters);
MyClass msg = template.postForObject(url, request, MyClass.class);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/14477010
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