我想將這個帶有 multipart/form-data 標頭請求的郵遞員客戶端轉(zhuǎn)換為 spring 模板客戶端?，F(xiàn)在，我有一個基本的休息控制器，效果很好。@RestController@RequestMapping("/api")public class MainConroller { private static final Logger log = LoggerFactory.getLogger(MainConroller.class); @Autowired private MainService mainService; public MainConroller(MainService mainService) { this.mainService = mainService; } @PostMapping("/mails/send") public void send( @RequestParam("usertoken") String usertoken, @RequestParam("sendTo") String sendTo, @RequestParam("subject") String subject, @RequestParam("content") String content, @RequestParam(required = false, name = "files") List<MultipartFile> multipartFiles) { log.debug("{}, {}, {}, {}", usertoken, sendTo, subject, content); mainService.processMessage(usertoken, sendTo, subject, content, multipartFiles); }}但是，我需要創(chuàng)建一個休息客戶端，所以我使用了一個休息模板，它現(xiàn)在看起來像這樣：ArrayList<HttpMessageConverter<?>> converters = new ArrayList<>( Arrays.asList(new MappingJackson2HttpMessageConverter(), new ResourceHttpMessageConverter(), new FormHttpMessageConverter())); @Bean public RestTemplate restTemplate() { return new RestTemplate(converters); }問題是當(dāng)我嘗試發(fā)送發(fā)布請求時，它拋出Exception in thread "main" org.springframework.web.client.RestClientException: Could not write request: no suitable HttpMessageConverter found for request type [org.springframework.util.LinkedMultiValueMap] and content type [multipart/form-data]
2 回答
鳳凰求蠱
TA貢獻1825條經(jīng)驗 獲得超4個贊
你把事情搞得太復(fù)雜了。您應(yīng)該使用單個地圖來保存表單值，而不是地圖的地圖。在 Spring Boot 旁邊已經(jīng)提供了一個，RestTemplate所以你不需要再次配置你自己的。
File file = new File("*********");
HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.setContentType(MediaType.MULTIPART_FORM_DATA);
MultiValueMap<String, Object> form = new LinkedMultiValueMap<>();
form.add("files", file);
form.add("files", file);
form.add("files", file);
form.add("usertoken", "test");
form.add("sendTo", "test");
form.add("subject", "test");
form.add("content", "test");
HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(form, httpHeaders);
String serverUrl = "****";
restTemplate().postForEntity(serverUrl, requestEntity, String.class);
在RestTemplate（或?qū)嶋H上的FormHttpMessageConverter），將其轉(zhuǎn)化為一個正確的請求。
慕標琳琳
TA貢獻1830條經(jīng)驗 獲得超9個贊
默認的 RestTemplate 構(gòu)造函數(shù)不包含任何消息轉(zhuǎn)換器，您需要添加它。例如，您可以這樣做：
HttpEntity<MultiValueMap<String, Object>> requestEntity = new
HttpEntity<MultiValueMap<String, Object>>(parts, requestHeaders);
RestTemplate restTemplate = getRestTemplate();
restTemplate.getMessageConverters().add(new FormHttpMessageConverter());
restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
return restTemplate.postForObject(apiURI, requestEntity, String.class);
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