[英]How to use RestTemplate with application/octet-stream response type
我正在使用ISBNdB来获取有关书籍的信息。响应类型是应用程序/八位字节流。 我得到的示例 json 响应如下所示
{
"index_searched" : "isbn",
"data" : [
{
"publisher_id" : "john_wiley_sons_inc",
"publisher_name" : "John Wiley & Sons, Inc",
"title_latin" : "Java programming interviews exposed",
"language" : "eng",
"summary" : "",
"physical_description_text" : "1 online resource (xvi, 368 pages) :",
"author_data" : [
{
"name" : "Markham, Noel",
"id" : "markham_noel"
},
{
"id" : "greg_milette",
"name" : "Greg Milette"
}
],
"title_long" : "Java programming interviews exposed",
"urls_text" : "",
"publisher_text" : "New York; John Wiley & Sons, Inc",
"book_id" : "java_programming_interviews_exposed",
"awards_text" : "; ",
"subject_ids" : [],
"isbn13" : "9781118722862",
"lcc_number" : "",
"title" : "Java programming interviews exposed",
"isbn10" : "1118722868",
"dewey_decimal" : "005.13/3",
"edition_info" : "; ",
"notes" : "\"Wrox programmer to programmer\"--Cover.; Acceso restringido a usuarios UCM = For UCM patrons only.",
"marc_enc_level" : "",
"dewey_normal" : "5.133"
}
]
}
我正在使用 Jackson 来转换此响应。 我的 Pojo 如下所示
@JsonIgnoreProperties(ignoreUnknown = true)
public class value {
private String index_searched;
// Another pojo in different file with ignore properties
private data[] dat;
public value(){
}
public data[] getDat() {
return dat;
}
public void setDat(data[] dat) {
this.dat = dat;
}
public String getIndex_searched() {
return index_searched;
}
public void setIndex_searched(String index_searched) {
this.index_searched = index_searched;
}
}
当我尝试跟随
value book = restTemplate.getForObject(FINAL_URL, value.class);
我得到这个例外
org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class com.rocketrenga.mylibrary.domain.value] and content type [application/octet-stream]
但我能够将响应映射到字符串
String book = restTemplate.getForObject(FINAL_URL, String.class);
ObjectMapper mapper = new ObjectMapper();
value val = mapper.readValue(book, value.class);
System.out.println(val.getIndex_searched());
如何直接映射响应 POJO 而不是 String 并转换回 POJO
您需要使用消息转换器配置 restTemplate。 在您的配置中执行以下操作:
@Bean
public RestOperations restTemplate() {
RestTemplate restTemplate = new RestTemplate();
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
converter.setSupportedMediaTypes(
Arrays.asList(new MediaType[]{MediaType.APPLICATION_JSON, MediaType.APPLICATION_OCTET_STREAM}));
restTemplate.setMessageConverters(Arrays.asList(converter, new FormHttpMessageConverter()));
return restTemplate;
}
我想更好的解决方案是添加另一个转换器,而不是修改当前的:
@Bean
public RestTemplate restTemplate() {
final RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(jacksonSupportsMoreTypes());
return restTemplate;
}
private HttpMessageConverter jacksonSupportsMoreTypes() {//eg. Gitlab returns JSON as plain text
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
converter.setSupportedMediaTypes(Arrays.asList(MediaType.parseMediaType("text/plain;charset=utf-8"), MediaType.APPLICATION_OCTET_STREAM));
return converter;
}
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