首先我不得不说,我对 Springs RestTemplate 还是很陌生。
我正在尝试从imdb-api接收数据。(例如http://imdbapi.org/?title=Avatar&type=xml)因此我使用 Springs RestTemplate。但:
- Web服务将数据作为应用程序/八位字节流返回(即使我声明我想要它作为xml(当我用浏览器浏览网站时,我得到的数据是text/xml))
- RestTemplate 没有找到我声明的 ByteArrayMessageConverter(转换应用程序/八位字节流)
我真的不知道我的错误在哪里。
这是初始化restTemplate的代码:
public void onInit() {
_log.debug("Setting up the Spring Resttemplate");
_restTemplate = new RestTemplate();
List<HttpMessageConverter<?>> list = new ArrayList<HttpMessageConverter<?>>();
list.add(new SourceHttpMessageConverter<Source>());
list.add(new ByteArrayHttpMessageConverter());
_restTemplate.setMessageConverters(list);
_log.debug("Setting up the HTTP Headers for Restrequest");
List<MediaType> acceptableMediaTypes = new ArrayList<MediaType>();
_log.trace("allow {}", MediaType.APPLICATION_XML_VALUE);
acceptableMediaTypes.add(MediaType.APPLICATION_XML);
_log.trace("allow {}", MediaType.TEXT_HTML_VALUE);
acceptableMediaTypes.add(MediaType.TEXT_XML);
_log.trace("set accepted charset to uft-8");
List<Charset> acceptableCharsets = new ArrayList<Charset>();
acceptableCharsets.add(Charset.forName("utf-8"));
_httpHeaders = new HttpHeaders();
_httpHeaders.set("User-Agent", "something"); //only a user-agent, because the api returns a 403 if it is not set
_httpHeaders.setAcceptCharset(acceptableCharsets);
_httpHeaders.setAccept(acceptableMediaTypes);
}
这是调用的代码:
_log.info("connect to Imdb-Webservice {}", _imbdWebserviceBaseUrl);
Map<String, Object> uriVariables = new HashMap<String, Object>();
uriVariables.put("title", pTitle);
ResponseEntity<Source> response = _restTemplate.exchange(_imbdWebserviceBaseUrl, HttpMethod.GET, new HttpEntity<String>(_httpHeaders), Source.class, uriVariables);
_imbdWebserviceBaseUrl 设置为http://imdbapi.org/?title= {title}&type=xml
然后我收到此错误消息:
org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [interface javax.xml.transform.Source] and content type [application/octet-stream]
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:107)
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:687)
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:673)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:491)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:454)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:401)
at my.domain.projectname.integrationimpl.WebserviceHelper.getXml(WebserviceHelper.java:131)
谢谢你的帮助