使用RestTemplate使用Header的HTTP get

Question

如何使用Spring RestTemplate发送GET请求？其他问题都用了POST，但我需要用get。当我运行这个程序时，程序继续工作，但似乎网络堵塞了，因为它在一个AsyncTask中，当我单击这个按钮后试图运行另一个AsyncTask时，它们将无法工作。

我试着做

String url = "https://api.blah.com/2.0/search/cubes?w=jdfkl&whitespace=1";

MultiValueMap<String, String> map = new LinkedMultiValueMap<String, String>();
map.add("Bearer", accessToken);

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED); //copied this from somewhere else, not sure what its for

HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<MultiValueMap<String, String>>(map, headers);

HttpMessageConverter<String> stringConverter = new StringHttpMessageConverter();
FormHttpMessageConverter formConverter = new FormHttpMessageConverter();
List<HttpMessageConverter<?>> msgConverters = new ArrayList<HttpMessageConverter<?>>();


msgConverters.add(formConverter);
msgConverters.add(new MappingJacksonHttpMessageConverter());
msgConverters.add(stringConverter); 

template.setMessageConverters(msgConverters);
//SetSearchResponseData is my custom class to store the incoming JSON
ResponseEntity<SetSearchResponseData> result = template.exchange(url, HttpMethod.GET, request, SetSearchResponseData.class);
//If I was using post, i could have done SetSearchResponseDataresponse = restTemplate.postForObject(url, request, SetSearchResponseData.class);

Answer 1

RestTemplateGetForObject()方法不支持设置标头。解决方案是使用exchange()方法。

因此，不要使用resttemplate.getforobject(url，string.class，param)（它没有标头）

HttpHeaders headers = new HttpHeaders();
headers.set("Header", "value");
headers.set("Other-Header", "othervalue");
...

HttpEntity entity = new HttpEntity(headers);

ResponseEntity<String> response = restTemplate.exchange(
    url, HttpMethod.GET, entity, String.class, param);

最后，使用response.getbody()获取结果。

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