为什么RestTemplate会从HAL+;JSON响应?
我使用RestTemplate测试通过SpringDataREST公开的API,在解析响应时无法获得链接。rest模板配置有Jackson2HalModule支持的HttpConverter,请求的实体具有指向JSON响应中显示的关联的链接 这里是JSON为什么RestTemplate会从HAL+;JSON响应?,json,spring,spring-data-rest,spring-hateoas,spring-web,Json,Spring,Spring Data Rest,Spring Hateoas,Spring Web,我使用RestTemplate测试通过SpringDataREST公开的API,在解析响应时无法获得链接。rest模板配置有Jackson2HalModule支持的HttpConverter,请求的实体具有指向JSON响应中显示的关联的链接 这里是JSON { "name" : "Hero @ Bangalore", "venue" : { "name" : "Wayne Manor", "address" : "1 MG Road", "city" : "Ban
{
"name" : "Hero @ Bangalore",
"venue" : {
"name" : "Wayne Manor",
"address" : "1 MG Road",
"city" : "Bangalore",
"state" : "Karnataka",
"pincode" : "560001"
},
"seatsAvailable" : 40,
"workshopType" : "Batman Challengers",
"date" : "2015-09-10",
"_links" : {
"self" : {
"href" : "http://localhost:8080/workshops/1{?projection}",
"templated" : true
},
"venue" : {
"href" : "http://localhost:8080/workshops/1/venue"
}
}
}
RestTemplate配置为,因为我们得到的是HAL+JSON响应
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
objectMapper.registerModule(new Jackson2HalModule());
MappingJackson2HttpMessageConverter halConverter = new MappingJackson2HttpMessageConverter();
halConverter.setSupportedMediaTypes(Arrays.asList(MediaTypes.HAL_JSON));
halConverter.setObjectMapper(objectMapper);
restTemplate = new RestTemplate();
List<HttpMessageConverter<?>> existingConverters = restTemplate.getMessageConverters();
List<HttpMessageConverter<?>> httpMessageConverters = new ArrayList<>();
httpMessageConverters.add(halMessageConverter);
httpMessageConverters.addAll(existingConverters);
给出一个
NullPointerException
您没有向RestTemplate
注册halConverter
,因为您只是查找现有的,并将它们加上halConverter
添加到一个任意列表中,该列表再也不会进入RestTemplate
。以及workshopResource.getBody().getLink(“场地”)
并更改为workshopResource.getBody().getLink(“场地”).getHref().equals(…)
修复了测试
ResponseEntity<Resource<Workshop>> workshopResource =
restTemplate
.exchange(DEFAULT_PROJECTION, HttpMethod.GET, null,
new ParameterizedTypeReference<Resource<Workshop>>() {
});
Workshop responseBody = workshopResource.getBody().getContent();
assertTrue(workshopResource.getBody().getLink("venue").equals(paulURI.toString()));