spring RestTemplate无内容类型

Question

我使用spring-android连接到服务器来获取json并将其映射到一个对象类：

jars：

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，如下所示：

{"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)

响应头中不能有Content-Type。如何让RestTemplate不关心Content-Type

Answer 1

这看起来像是从Spring3.0.x代码继承而来的缺陷。详情请参见https://jira.springsource.org/browse/SPR-7911。您可以尝试列出的here中的一种解决方法