春天RestTemplate没有内容类型

Question

我用弹簧机器人连接到服务器获取JSON并将其映射到一个对象类：

罐子：

jackson-core-asl-1.9.2.jar 
jackson-mapper-asl-1.9.2.jar 
spring-android-auth-1.0.0.M4.jar 
spring-android-core-1.0.0.M4.jar 
spring-android-rest-template-1.0.0.M4.jar 

来源：

RestTemplate restTemplate = new RestTemplate(/* clientHttpRequestFactory */); 

ClientHttpRequestFactory clientHttpRequestFactory = new SimpleClientHttpRequestFactory(); 
restTemplate.setRequestFactory(clientHttpRequestFactory); 

MappingJacksonHttpMessageConverter httpMessageConverter = new MappingJacksonHttpMessageConverter(); 
List<MediaType> supportedMediaTypes = new ArrayList<MediaType>(); 
supportedMediaTypes.add(new MediaType("application", "json")); 
httpMessageConverter.setSupportedMediaTypes(supportedMediaTypes); 

List<HttpMessageConverter<?>> httpMessageConverters = restTemplate 
       .getMessageConverters(); 
httpMessageConverters.add(httpMessageConverter); 
restTemplate.setMessageConverters(httpMessageConverters); 

MultiValueMap<String, Object> map = new LinkedMultiValueMap<String, Object>(); 
map.add("param1", "param1"); 
map.add("param2", "2"); 

T t = restTemplate.postForObject(url, map, T.class); 

来自服务器的结果是一个json字符串，如：

{"aaa":"111", "bbb":"222"} 

结果是：

Caused by: org.springframework.web.client.RestClientException: Cannot extract response: no Content-Type found 
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:60) 
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:470) 
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:425) 
    at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:303) 

必须有在响应标头中没有Content-Type。我怎样才能让RestTemplate不在乎Content-Type？

Answer 1

这看起来像是继承自Spring 3.0.x代码的一个缺陷。有关详细信息，请参阅https://jira.springsource.org/browse/SPR-7911。您可以尝试列出的解决方法之一here